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泡沫塑料吸水率的试验方法硬质泡沫吸水率测定仪：
目的：
通过测量浸没在水下50mm、96h 后样品的浮力来测定本规程规定了样品体积变化的校正和样品切割表面泡孔的体积校正。
设备仪器
天平应能悬挂网笼，准确至0.1g
网笼由不锈钢材料制成，大小能容纳试样，底部附有能抵消试样浮力的重块，顶部有能挂到天平上的挂架
圆简容器直径至少为250mm, 高为250mm
低渗透塑料薄膜如聚乙烯薄膜。
切片器
切片器应有切割样品薄片厚度为0.1mm~0.4mm 的能力
载片
将两片幻灯玻璃片用胶布粘接成活叶状，中间放一张印有标准刻度(长度30mm) 的计算坐标的透明塑料薄片。
投影仪适用于50mM50mm 标准幻灯片的通用型35mm 幻灯片投影仪，或者带有标准刻度的投影显微镜。
试验原理
通过测量在蒸馏水中浸泡一定时间试样的浮力来测定材料的吸水率浸泡液选用蒸留后至少放置48h 后的蒸水检测步骤首先依次进行试验的基本步骤，包括如下内容23+2)。
和按GB/T2918的规定调节试验环境为50±5)%相对湿度；称量干燥后试样质量(m¹),准确至0.1g; 按GB/T342 的规定测量试样线性尺寸用于计算准确至01cm³
在试验环境下将蒸馏水注入圆筒容器内；将网笼没入水中，除去网笼表面气泡，挂在天平上，称其表观质量(m2), 准确至0.1g;
将试样装入网笼，重新浸入水中，并使试样顶面距水面约50mm, 用软毛刷或搅动除去网笼和样品表面气泡；用低渗透塑料薄膜覆盖在圆简容器内；
(96±1)h或其他约定浸泡时间后，移去塑料薄膜，称量浸在水中装有试样的网笼的表观质量(m³),准确至0.1g;。
一、概述硬质泡沫塑料是一种常见的材料，在工业、建筑和包装行业都有广泛的应用。
为了确保其质量和性能能够满足要求，我们需要对其吸水率进行测试。
本指导书旨在对硬质泡沫塑料的吸水率试验进行详细的介绍，确保测试的准确性和可靠性。
二、试验目的1. 了解硬质泡沫塑料对水的吸收能力。
2. 评估硬质泡沫塑料在潮湿环境下的稳定性。
3. 为材料的选材和设计提供参考依据。
三、试验原理硬质泡沫塑料的吸水率指的是单位时间内被吸收水的质量与材料自身质量的比值。
通常使用以下公式进行计算：吸水率 = （吸水后的质量 - 干燥前的质量）/ 干燥前的质量× 100四、试验仪器和设备1. 电子天平2. 恒温恒湿箱3. 干燥器4. 测量容器5. 质量计6. 洁净毛刷五、试验样品准备1. 选择代表性的硬质泡沫塑料样品。
2. 按照标准要求，将样品切割成规定的尺寸。
3. 称量并记录每个样品的初始质量。
六、试验步骤1. 将待测试的样品放入恒温恒湿箱中，设置合适的温度和湿度参数。
2. 设置吸水时间，通常为24小时。
3. 取出样品，用干燥器将其表面的自由水蒸发干净。
4. 使用电子天平精确称量吸水后的样品质量，并记录。
5. 根据试验原理计算吸水率，并记录。
七、数据处理与分析1. 根据试验结果计算吸水率的平均值，并进行统计分析。
2. 将试验数据与标准要求进行对比，评估样品的吸水性能。
八、注意事项1. 样品的选择应该具有代表性，能够反映整批产品的性能。
2. 在试验过程中要注意维持恒温恒湿箱内的环境参数稳定。
3. 进行试验前要对仪器和设备进行校准和检查，确保准确性。
九、安全注意事项1. 在操作试验设备时要注意安全，防止发生意外。
2. 根据设备使用说明书正确操作，防止损坏设备和样品。
十、总结本试验指导书详细介绍了硬质泡沫塑料吸水率试验的具体步骤和注意事项，希望能够对进行相关试验的学生和工作者提供帮助。
在进行试验时，要严格按照标准要求进行操作，确保结果的准确性和可靠性。
硬质泡沫塑料吸水率测定方法1.1 体积吸水率1.1.1 适用范围及规范性引用文件1适用范围本规程规定了硬质泡沫塑料吸水率的测定方法：通过测量浸没在水下50mm 、96h 后样品的浮力来测定。
本规程规定了样品体积变化的校正和样品切割表面泡孔的体积校正。
2规范性引用文件下列标准所包含的条文，通过在本规程中引用而构成为本规程的条文。
使用本规程的各方应探讨使用下列标准最新版本的可能性。
GBT 8810-2005硬质泡沫塑料吸水率的测定GB/T 2918-1998 塑料试样状态调节和试验的标准环境GB/T 6342-1996 泡沫塑料与橡胶线性尺寸的测定1.1.2 设备仪器1天平天平应能悬挂网笼，准确至0.1g。
2网笼由不锈钢材料制成，大小能容纳试样，底部附有能抵消试样浮力的重块，顶部有能挂到天平上的挂架（见图 1.1）。
图 1.1 网笼及试块示意图3圆筒容器直径至少为250mm ，高为 250mm。
4低渗透塑料薄膜如聚乙烯薄膜。
5切片器切片器应有切割样品薄片厚度为0.1mm~0.4mm 的能力（见图10.2）。
图 1.2 切片机6载片将两片幻灯玻璃片用胶布粘接成活叶状，中间放一张印有标准刻度（长度30mm）的计算坐标的透明塑料薄片（见图 1.3）。
图 1.3 载片装置7投影仪适用于 50mm× 50mm 标准幻灯片的通用型35mm 幻灯片投影仪，或者带有标准刻度的投影显微镜。
1.1.3 检测程序1试验原理通过测量在蒸馏水中浸泡一定时间试样的浮力来测定材料的吸水率。
2浸泡液选用蒸馏后至少放置48h 后的蒸馏水。
3检测步骤首先依次进行试验的基本步骤，包括如下内容：按 GB/T 2918 的规定调节试验环境为（23±2）℃和（50±5）%相对湿度；称量干燥后试样质量（m1），准确至 0.1g；按 GB/T6342 的规定测量试样线性尺寸用于计算V0，V0准确至 0.1cm3；在试验环境下将蒸馏水注入圆筒容器内；将网笼浸入水中，除去网笼表面气泡，挂在天平上，称其表观质量（ m2），准确至 0.1g；将试样装入网笼，重新浸入水中，并使试样顶面距水面约50mm ，用软毛刷或搅动除去网笼和样品表面气泡；用低渗透塑料薄膜覆盖在圆筒容器内；（ 96±1） h 或其他约定浸泡时间后，移去塑料薄膜，称量浸在水中装有试样的网笼的表观质量（m3），准确至 0.1g；目测试样溶胀情况，来确定溶胀和切割表面体积的校正。
2.0±0.4mm/min 1.3mm/min 速度80x10x4mm 厚度的15-17倍64x12x3.2mm 跨度:厚度的14-20倍典型试样ISO-178ASTM D790压头半径均为:5±0.1mm25023900kgf/cm233900psi 2340MPa ASTM D 790 Flexural Modulus, 1.3 mm/min, 50 mm span弯曲模量,速度,跨距980kgf/cm213900psi 96MPa ASTM D 790 Flexural Stress, yld, 1.3 mm/min, 50 mm span弯曲强度(挠曲强度),屈服,试样类型,速度241RPDF 文件使用 "pdfFactory Pro" 试用版本创建 却贝冲击强度(Charpy impact strength)ISO179，ASTM D6110 简支梁冲击强度(有刻痕或无刻痕)试样水平放置，两端不固定.若试样未被破坏, 则换一个 更重的摆锤并重复以上步骤, 直到试样破坏.试验数据 冲击强度是冲击能(J)与 缺口处的横截面积之比（m2)PDF 文件使用 "pdfFactory Pro" 试用版本创建 ISO179试样规格(Specimen size)刻痕A B C刻痕圆角半径 (mm)0.25 1.00 0.10水平的刀口朝前的(类型2和3用于长纤维增强的塑料)类型 1 2 3 长度 (mm) 80 25 x 厚度 11 或 13 x 厚度 宽度 (mm) 10 10 或 15 10 或 15 厚度 (mm) 4 3 3 跨距 (mm) 62 20 x 厚度 6 或 8 x 厚度PDF 文件使用 "pdfFactory Pro" 试用版本创建 邵氏硬度(Shore hardness)ASTM D 2240试验范围 用于确定塑料或橡胶等软性材料的相对硬度，数值在20-90间 规定压针在指定压强和时间条件下的压入的深度转为硬度值. 试验方法 把硬度计的压针压入试样内, 并保证它与台面平行, 试样厚度:6.4mmD:1.25mm d:0.79mmD:1.25mm φ:300A型（较软材料）D型（较硬材料）PDF 文件使用 "pdfFactory Pro" 试用版本创建 洛氏硬度(Rockwell hardness)ASTM D785, ISO 20391919年由美国人Rockwell提出 适用于塑料的洛式硬度计有M，L，R三种标尺，数值在50-115之间 试验方法 先施加初压力，压痕深度H1,再施加主压力,记录总深度H2, 15秒后将主压力卸除。
细骨材的密度及吸水率的试验方法Methods of test for density and water absorption of fine aggregates1. 适用范围本规格规定了细骨材（1）的密度及吸水率的试验方法。
注（1）结构用轻量细骨材自绝对干燥状态开始，吸水24小时进行试验时，应按照JIS A1134的规定执行。
备注本规格对应的国际规格如下所示。
另外，表示对应程度的字母，按照ISO/IEC Guide 21，为IDT（表示一致）、MOD （表示有修正）、NEQ（表示不同等）。
ISO 7033:1987, Fine and coarse aggregates for concrete-Determination of the particle mass-per-volume and water absorption–Pycnometer method(MOD)1. 引用的规格如下规格经引用到本规格，将成为本规格的一部分。
这些引用的规格，同样其最新版（包括追加事项）也适用于本规格。
JIS A 1134 结构用轻量细骨材的密度及吸水率的试验方法3. 器具3.1 秤秤的称量应在2kg以上，目量应为0.1g或更小。
3.2 比重瓶烧杯或其它适当的容器（以下简称比重瓶）应为非吸水性材料，能够容易放进细骨材试料（2）。
另外，到达标定的容量刻度的容积，应在容纳试料所需容量的1.5倍以上，3倍以下。
参考标定的容量多为500ml。
轻量骨材时，容器的溶积应在700ml以上为好。
另外，试验浮在水面上的轻量骨材时，应使用带盖子的比重瓶。
注（2）反复进行试验时，容量应能保证在±0.1%以内的精度。
3.3 流量计细骨材表面干澡饱水状态试验用的、非吸水性材料制作的流量计，尺寸应为上面内径40±3mm，底面内径90±3mm，高度75±3mm，厚度4mm以上。
2A1109:20063.4 戳棒戳棒的质量应为340±15g，一端的圆形断面直径应为23±3mm。
环氧树脂吸水率测试标准一、老化测试：紫外老化试验：ASTM G154-06、ISO 4892-3:2006、GBT 16422.3；氙灯老化试验：ASTM G155、ISO 4892-2、GBT 16422.2、SAE J2527-2004；中性盐雾试验：GB/T 10125-1997、ASTM B117-09、GBT 2423.17-2008；交变盐雾试验：GBT 2423.18-2000；酸性盐雾试验：GB/T 10125-1997；臭氧老化试验：GBT 7762-2003；高温老化试验：GBT 2423.2-2008；低温老化试验：GBT 2423.1-2008；高低温循环老化试验：GB2423.22-2002；湿热老化试验：GB2423.22-2002；二、物性测试：邵氏A型硬度ASTM D2240-05(2010)、ISO 868-2003、GB/T 2411-2008 邵氏D型硬度ASTM D2240-05(2010)、ISO 868-2003、GB/T 2411-2008 洛氏硬度ASTM D785-08、ISO 2039-2:1987、GB/T 3398.2-2008球压痕硬度ISO 2039-1:2001、GB/T 3398.1-2008密度GB/T 1033.1-2008(浸泡法）分子量ASTM D3598假比重ASTM D1895粒径分布ASTM D1912透光率ASTM D1003-07e1 Method A、GB/T 2410-2008 Method A灰分/灼烧残余ASTM D482水分含量ISO 15512-2008 Method B吸水率ASTM D570-98(2010)、ISO 62-2008、GB/T 1034-2008磨耗性能GB/T 5478-2008、ISO 9352-1995耐环境应力开裂DBL 5404-2010 7.13粘着力GB/T 10457-2009耐化学试剂ASTM D543-06 方法A (浸泡法)、GB/T 11547-2008(浸泡法) 游离单体拉伸强度ASTM D638-10、GB/T 1040.2:2006、ISO 527-2:1993/Cor.1:1994断裂伸长率ASTM D638-10、GB/T 1040.2:2006、ISO 527-2:1993/Cor.1:1994拉伸模量ASTM D638-10、GB/T 1040.2:2006、ISO 527-2:1993/Cor.1:1994撕裂强度GB/T 16578.1-2008拉伸强度（横向）GB/T 1043.1-2008拉伸强度（纵向）GB/T 1043.1-2008弯曲强度ASTM D790-2010、ISO 178-2010、GB/T 9341-2008弯曲模量ASTM D790-2010、ISO 178-2010、GB/T 9341-2008压缩强度ASTM D695-10、ISO 604-2002、GB/T 1041-2008悬臂梁冲击强度ASTM D256-10、ASTM D4812-06、GB/T 1843-2008、ISO 180-2001简支梁冲击强度ASTM D6110-10、GB/T 1043.1-2008、ISO 179-1-2001 压缩永久变形GB/T 7759-1996、ISO 815-2008体积电阻率GB/T 1409-2006表面电阻率GB/T 1409-2006介电强度GB/T 1409-2006介电常数GB/T 1409-2006损耗因子GB/T 1409-2006耐电弧性GB/T 1409-2006耐电晕性GB/T 1409-2006熔点GB/T 4608-84玻璃化温度GB/T 11998-1989热变形温度GB/T 1634.2-2004维卡软化点GB/T 1633-2000 、ISO 306:2004 、ASTM D1525-09低温脆化温度GB/T 5470-2008、ISO 974-2000、ASTM D746-07热膨胀系数ASTM D696三、建筑材料燃烧性能检测：燃烧级别判定标准试验方法A1级不燃性材料GB/T 5464 燃烧热值试验A2级不燃性材料GB/T 5464 燃烧热值试验、单体燃烧试验、附加材料产烟毒性试验B级可燃性材料GB/T 8626 单体燃烧试验、附加材料产烟毒性试验C级可燃性材料GB/T 8626 单体燃烧试验、附加材料产烟毒性试验D级可燃性材料GB/T 8626 单体燃烧试验E级可燃性材料GB/T 8626F级无性能要求四、RoHS六项检测：Pb IEC 62321As IEC 62321Hg IEC 62321Cr IEC 62321多溴联苯（PBBs）IEC 62321多溴联苯醚（PBDEs）IEC 62321。
DISO62is technically equivalent to this test method.2.Referenced Documents2.1ASTM Standards:D647Practice for Design of Molds for Test Specimens of Plastic Molding Materials22.2ISO Standard:ISO62Plastics—Determination of Water Absorption33.Significance and Use3.1This test method for rate of water absorption has two chief functions:first,as a guide to the proportion of water absorbed by a material and consequently,in those cases where the relationships between moisture and electrical or mechanical properties,dimensions,or appearance have been determined, as a guide to the effects of exposure to water or humid conditions on such properties;and second,as a control test on the uniformity of a product.This second function is particu-larly applicable to sheet,rod,and tube arms when the test is made on thefinished product.3.2Comparison of water absorption values of various plas-tics can be made on the basis of values obtained in accordance with7.1and7.4.3.3Ideal diffusion of liquids4into polymers is a function of the square root of immersion time.Time to saturation is strongly dependent on specimen thickness.For example,Table 1shows the time to approximate time saturation for various thickness of nylon-6.3.4The moisture content of a plastic is very intimately related to such properties as electrical insulation resistance, dielectric losses,mechanical strength,appearance,and dimen-sions.The effect upon these properties of change in moisture content due to water absorption depends largely on the type of exposure(by immersion in water or by exposure to high humidity),shape of the part,and inherent properties of the plastic.With nonhomogeneous materials,such as laminated forms,the rate of water absorption may be widely different through each edge and surface.Even for otherwise homoge-neous materials,it may be slightly greater through cut edges than through molded surfaces.Consequently,attempts to correlate water absorption with the surface area must generally be limited to closely related materials and to similarly shaped specimens:For materials of widely varying density,relation between water-absorption values on a volume as well as a weight basis may need to be considered.4.Apparatus4.1Balance—An analytical balance capable of reading 0.0001g.4.2Oven,capable of maintaining uniform temperatures of 5063°C[12265.4°F]and of105to110°C[221to230°F].5.Test Specimen5.1The test specimen for molded plastics shall be in the form of a disk50.8mm[2in.]in diameter and3.2mm[1⁄8in.] in thickness(see Note2).Permissible variations in thickness are60.18mm[60.007in.]for hot-molded and60.30mm [60.012in.]for cold-molded or cast materials.1This test method is under the jurisdiction of ASTM Committee D20on Plasticsand is the direct responsibility of Subcommittee D20.50on Durability of Plastics.Current edition approved Nov.1,2005.Published January2006.Originally approved st previous edition approved in1998as D570-98.2Withdrawn.3Available from American National Standards Institute(ANSI),25W.43rd St., 4th Floor,New York,NY10036.4Additional information regarding diffusion of liquids in polymers can be found in the following references:(1)Diffusion,Mass Transfer in Fluid Systems,E.L.Cussler,Cambridge University Press,1985,ISBN0-521-29846-6,(2)Diffusion in Polymers,J.Crank and G.S.Park,Academic Press,1968,and(3)“Permeation, Diffusion,and Sorption of Gases and Vapors,”R.M.Felder and G.S.Huvard,in Methods of Experimental Physics,V ol16C,1980,Academic Press.1Copyright©ASTM International,100Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.N OTE 2—The disk mold prescribed in the Molds for Disk Test Specimens Section of Practice D 647is suitable for molding disk test specimens of thermosetting materials but not thermoplastic materials.5.2ISO Standard Specimen —The test specimen for homo-geneous plastics shall be 60by 60by 1mm.Tolerance for the 60-mm dimension is 62mm and 60.05mm for the 1-mm thickness.This test method and ISO 62are technically equiva-lent when the test specimen described in 5.2is used.5.3The test specimen for sheets shall be in the form of a bar 76.2mm [3in.]long by 25.4mm [1in.]wide by the thickness of the material.When comparison of absorption values with molded plastics is desired,specimens 3.2-mm [1⁄8-in.]thick should be used.Permissible variations in thickness shall be 0.20mm [60.008in.]except for materials which have greater standard commercial tolerances.5.4The test specimen for rods shall be 25.4-mm [1-in.]long for rods 25.4mm in diameter or under and 12.7-mm [1⁄2-in.]long for larger-diameter rods.The diameter of the specimen shall be the diameter of the finished rod.5.5The test specimen for tubes less than 76mm [3in.]in inside diameter shall be the full section of the tube and 25.4-mm [1-in.]long.For tubes 76mm [3in.]or more in inside diameter,a rectangular specimen shall be cut 76mm in length in the circumferential direction of the tube and 25.4mm in width lengthwise of the tube.5.6The test specimens for sheets,rods,and tubes shall be machined,sawed,or sheared from the sample so as to have smooth edges free from cracks.The cut edges shall be made smooth by finishing with No.0or finer sandpaper or emery cloth.Sawing,machining,and sandpapering operations shall be slow enough so that the material is not heated appreciably.N OTE 3—If there is any oil on the surface of the specimen when received or as a result of machining operations,wash the specimen with a cloth wet with gasoline to remove oil,wipe with a dry cloth,and allow to stand in air for 2h to permit evaporation of the gasoline.If gasoline attacks the plastic,use some suitable solvent or detergent that will evaporate within the 2-h period.5.7The dimensions listed in the following table for the various specimens shall be measured to the nearest 0.025mm [0.001in.].Dimensions not listed shall be measured within 0.8mm [61⁄32in.].Type of Specimen Dimensions to Be Measured to the Nearest 0.025mm [0.001in.]Molded disk thickness Sheet thicknessRod length and diameterTubeinside and outside diameter,and wall thickness6.Conditioning6.1Three specimens shall be conditioned as follows:6.1.1Specimens of materials whose water-absorption value would be appreciably affected by temperatures in the neigh-borhood of 110°C [230°F],shall be dried in an oven for 24h at 5063°C [12265.4°F],cooled in a desiccator,and imme-diately weighed to the nearest 0.001g.N OTE 4—If a static charge interferes with the weighing,lightly rub the surface of the specimens with a grounded conductor.6.1.2Specimens of materials,such as phenolic laminated plastics and other products whose water-absorption value has been shown not to be appreciably affected by temperatures up to 110°C [230°F],shall be dried in an oven for 1h at 105to 110°C [221to 230°F].6.1.3When data for comparison with absorption values for other plastics are desired,the specimens shall be dried in an oven for 24h at 5063°C [12265.4°F],cooled in a desic-cator,and immediately weighed to the nearest 0.001g.7.Procedure7.1Twenty-Four Hour Immersion —The conditioned speci-mens shall be placed in a container of distilled water main-tained at a temperature of 2361°C [73.461.8°F],and shall rest on edge and be entirely immersed.At the end of 24,+1⁄2,−0h,the specimens shall be removed from the water one at a time,all surface water wiped off with a dry cloth,and weighed to the nearest 0.001g immediately.If the specimen is 1⁄16in.or less in thickness,it shall be put in a weighing bottle immedi-ately after wiping and weighed in the bottle.7.2Two-Hour Immersion —For all thicknesses of materials having a relatively high rate of absorption,and for thin specimens of other materials which may show a significant weight increase in 2h,the specimens shall be tested as described in 7.1except that the time of immersion shall be reduced to 12064min.7.3Repeated Immersion —A specimen may be weighed to the nearest 0.001g after 2-h immersion,replaced in the water,and weighed again after 24h.N OTE 5—In using this test method the amount of water absorbed in 24h may be less than it would have been had the immersion not been interrupted.7.4Long-Term Immersion —To determine the total water absorbed when substantially saturated,the conditioned speci-mens shall be tested as described in 7.1except that at the end of 24h they shall be removed from the water,wiped free of surface moisture with a dry cloth,weighed to the nearest 0.001g immediately,and then replaced in the water.The weighings shall be repeated at the end of the first week and every two weeks thereafter until the increase in weight per two-week period,as shown by three consecutive weighings,averages less than 1%of the total increase in weight or 5mg,whichever is greater;the specimen shall then be considered substantially saturated.The difference between the substantially saturated weight and the dry weight shall be considered as the water absorbed when substantially saturated.7.5Two-Hour Boiling Water Immersion —The conditioned specimens shall be placed in a container of boiling distilled water,and shall be supported on edge and be entirely im-mersed.At the end of 12064min,the specimens shall be removed from the water and cooled in distilled water main-tained at room temperature.After 1561min,the specimens shall be removed from the water,one at a time,all surfaceTABLE 1Time to Saturation for Various Thickness of Nylon-6Thickness,mmTypical Time to 95%Saturation,h110024003.2100010100002562000water removed with a dry cloth,and the specimens weighed to the nearest0.001g immediately.If the specimen is1⁄16in.or less in thickness,it shall be weighed in a weighing bottle. 7.6One-Half-Hour Boiling Water Immersion—For all thicknesses of materials having a relatively high rate of absorption and for thin specimens of other materials which may show a significant weight increase in1⁄2h,the specimens shall be tested as described in7.5,except that the time of immersion shall be reduced to3061min.7.7Immersion at50°C—The conditioned specimens shall be tested as described in7.5,except that the time and temperature of immersion shall be4861h and5061°C [122.061.8°F],respectively,and cooling in water before weighing shall be omitted.7.8When data for comparison with absorption values for other plastics are desired,the24-h immersion procedure described in7.1and the equilibrium value determined in7.4 shall be used.8.Reconditioning8.1When materials are known or suspected to contain any appreciable amount of water-soluble ingredients,the speci-mens,after immersion,shall be weighed,and then recondi-tioned for the same time and temperature as used in the original drying period.They shall then be cooled in a desiccator and immediately reweighed.If the reconditioned weight is lower than the conditioned weight,the difference shall be considered as water-soluble matter lost during the immersion test.For such materials,the water-absorption value shall be taken as the sum of the increase in weight on immersion and of the weight of the water-soluble matter.9.Calculation and Report9.1The report shall include the values for each specimen and the average for the three specimens as follows:9.1.1Dimensions of the specimens before test,measured in accordance with5.6,and reported to the nearest0.025mm [0.001in.],9.1.2Conditioning time and temperature,9.1.3Immersion procedure used,9.1.4Time of immersion(long-term immersion procedure only),9.1.5Percentage increase in weight during immersion,cal-culated to the nearest0.01%as follows:Increase in weight,%5wet weight2conditioned weightconditioned weight31009.1.6Percentage of soluble matter lost during immersion,ifdetermined,calculated to the nearest0.01%as follows(seeNote6):Soluble matter lost,%5conditioned weight2reconditioned weightconditioned weight3100N OTE6—When the weight on reconditioning the specimen after im-mersion in water exceeds the conditioned weight prior to immersion,report“none”under9.1.6.9.1.7For long-term immersion procedure only,prepare agraph of the increase in weight as a function of the square rootof each immersion time.The initial slope of this graph isproportional to the diffusion constant of water in the plastic.The plateau region with little or no change in weight as afunction of the square root of immersion time represents thesaturation water content of the plastic.N OTE7—Deviation from the initial slope and plateau model indicatesthat simple diffusion may be a poor model for determining water content.In such cases,additional studies are suggested to determine a better modelfor water absorption.9.1.8The percentage of water absorbed,which is the sum ofthe values in9.1.5and9.1.6,and9.1.9Any observations as to warping,cracking,or changein appearance of the specimens.10.Precision and Bias510.1Precision—An interlaboratory test program was car-ried out using the procedure outlined in7.1,involving threelaboratories and three materials.Analysis of this data yields thefollowing coefficients of variation(average of three replicates).WithinLaboratoriesBetweenLaboratoriesAverage absorption above1%(2materials)2.33% 4.89%Average absorption below0.2%(1material)9.01%16.63%N OTE8—A round robin is currently under way to more completelydetermine repeatability and reproducibility of this test method.10.2Bias—No justifiable statement on the bias of this testmethod can be made,since the true value of the propertycannot be established by an accepted referee method.11.Keywords11.1absorption;immersion;plastics;water5Supporting data are available from ASTM Headquarters.Request RR:D20-1064.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this ers of this standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed everyfive years and if not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of the responsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959, United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the above address or at610-832-9585(phone),610-832-9555(fax),or service@(e-mail);or through the ASTM website ().。
塑料行业ASTM标准大全ASTMD 4549-98 聚苯乙烯模塑和挤出材料规范ASTM D1693-00 乙烯塑料环境应力开裂标准试验方法ASTM D 256 塑料和电绝缘材料抗冲击性能试验方法ASTM D 570 塑料吸水试验方法ASTM D 638 塑料拉伸性能试验方法ASTM D1238 塑料熔体流动速率试验方法ASTM D257 塑料体积电阻率试验方法ASTM D 648 塑料弯曲负荷下热变形温度试验方法ASTM D 788 甲基丙烯酸酯模塑和挤出材料规范ASTM D 790 非增强，增强塑料和电绝缘材料弯曲性能的试验方法ASTM D 883 塑料术语定义ASTM D746 塑料低温脆化温度的试验方法ASTM D 955 从模塑塑料的模塑尺寸测定收缩率的试验方法ASTM D 957 测定塑料模具表面温度的操作规程ASTM D 3935 未填充和增强聚碳酸酯（PC）材料规范ASTM D 4066 尼龙注塑和挤出材料规范ASTM D 4101 丙烯塑料注塑和挤出材料规范ASTM D 4181 聚甲醛（POM）模塑和挤出材料规范ASTM D 4507 热塑性聚酯(TPES)材料规范ASTM D 4549 聚苯乙烯模塑和挤出材料规范ASTM D3641-97热塑性模塑和挤塑材料的注塑成型试样的标准操作规ASTM D3835-96用毛细管流变仪法测定聚合物材料的流变特性ASTM D4019-94a 用库仑法测定塑料湿度的标准试验方法ASTM D4065-95 测定和报告塑料动态力学性能的操作指南ASTMD 4101-00 聚丙烯模塑和挤出材料规范ASTM D5023-95a 用三点弯曲法测定塑料动态力学性能试验方法ASTM D5420-98a 落锤冲击法（Gardner Impact）平板硬质塑料试样耐冲击性试验方法ASTM D5422-93 用螺杆挤出毛细管流变仪测定热塑性塑料材料特性的试验方法ASTM D 5524-94高密度聚乙烯中酚类抗氧剂的测定的标准方法（液相色谱）ASTM D 5815-95线性低密度聚乙醇中酚类抗氧剂及芥酸类添加剂测定的标准方法（液相色谱）ASTM D5857-96 采用ISO标准和方法的丙烯塑料模塑和挤出材料规ASTM D 6042-96 聚丙烯均聚物中酚类抗氧剂及芥酸类添加剂测定的标准方法（液相色谱）ASTM D 3795-93 用扭矩流变仪测量热固性塑料热流动和固化性能标准试验方法ASTM D1248-84(89) 聚乙烯模塑和挤出材料规格ASTM D 746-98 塑料和弹性体冲击脆化温度试验方法ASTM D2396-94 扭矩流变仪测量PVC树脂粉末混合时间的标准试验ASTMD：4440-01塑料标准实验方法：动态机械性能熔体流变学ASTM D2591 塑料热应力开裂试验方法ASTM D1591 塑料介电常数和损耗正切的试验方法。
