TSRC DEXCO1973TSRC (Taiwan Synthetic Rubber Company) is established in Taipei, Taiwan198420,000-ton styrenic block copolymer plant constructed in Kaohsiung, Taiwan1988Dexcopartnershipcreated as 50/50 joint venture of Dow Chemical and Exxon199032,000-ton SIS plant inPlaquemine, LA, to produce pure-block VECTOR ® products199130,000-ton SBS plant in Plaquemine, LA, to produce pure-block VECTOR products199434,000-ton SBC capacity added to plant in Kaohsiung, Taiwan1995Successfully hydrogenated TPEs in Taiwan1996Achieved first VECTOR sales for photopolymer plate applications; introduced four-arm VECTOR SIproductsYOUR LOCAL EXPERTS AROUND THE WORLDPlaquemineHoustonGlobal Headquarters Sales Office Technology Center Manufacturing LocationLuxembourgNantong2005 New SEBS catalyst technology developed 2005VECTOR SIradials introducedfor die-cuttableadhesives2006CommercializedVECTOR film-grade resins200820,000-tonSEBS plantstarted up inNantong, China2011TSRC acquiredDexco to becomeone of theworld’s top SBCproducers2011TSRC announcedjoint venture withCPC in Taiwanto produce SISproducts2011TSRCLuxembourgestablished toserve customersthroughoutEurope/MiddleEast/Africa region201425,000-ton SISplant in Nantong,China, starts toproduce VECTORproducts1TAIPOL®A trusted brand for many applicationsTSRC / Dexco continues to manufacture the well-known TAIPOL line of synthetic polymers, proven performers, particularly in the automotive industry, and also for use in shoes, toys, building materials, household goods and industrial supplies.23IF YOU CAN IMAGINE IT, WE’LL HELP YOU MAKE ITThe market for synthetic polymers changes constantly. T o earn our reputation as leaders in the industry, TSRC / Dexco adheres to a clear R&D strategy, consistently introducing new products in response to the market needs. We continue to expand our technology by investing in the industry’s brightest professional minds and the finest research facilities. Additionally, we have formedsuccessful long-term relationships with academic and research institutes worldwide and collaborated with many well-respected international players, including our valued clients.As a result, we are well positioned to offer our innovative clients limitless opportunities to find new and better waysto achieve their goals.BEADS OFPURE INSPIRATIONMAJOR APPLICATIONSThe elasticity and softness of rubber, combined with the strength and rigidity of plastics; that’s the beauty of thermoplastics elastomers, including our styrenic block copolymers (SBC). Composed of styrene and other monomers, they’re excellent for use in a wide range of applications, from paving and roofing materials to diapers, films and adhesives.ELASTIC FILMSTSRC / Dexco’s proprietary polymer synthesis technology allows for unprecedented control of block copolymer composition and properties. VECTOR styrenic block copolymers (SBCs) are stable, narrow molecular-weight styrenic block copolymers produced sequentially in an anionic polymerization process. These virtually 100% pure triblock copolymerscontain no residual diblock and have thehighest level of elasticity compared withSBCs of similar composition.VECTOR SIS- and SBS-based films are usedin laminate structures found in personal-careand hygiene applications including babydiapers and adult incontinence products,more specifically in diaper side panels, earsand waistband applications, where comfortand fit are important considerations.PACKAGINGThe unique structure of VECTOR SBCsmakes them useful for a variety of packagingapplications. For example, whereverdissimilar materials are blended or otherwisecombined, high-styrene VECTOR 4411 andVECTOR 6241 are especially well suitedto enhance compatibility between styrenicand olefinic polymers. The polymers allowprocessors to combine these materialseffectively to create distinctive films with awide range of desired properties.TSRC / Dexco’s SBCs have the addedadvantage of improving impact and drawproperties for thermoforming applications.Because VECTOR SBCs are stable,narrow molecular-weight styrenic blockcopolymers, they improve melt strengthduring processing and impact performance,and toughness and crack resistance inthe final product. They blend readily withpolyolefins such as low-density polyethyleneand ethylene vinyl acetate resins, andstyrenic polymers such as crystal andhigh-impact polystyrene. They can acceptcommon oils, fillers, process aids, antiblockagents and colorants.45 FLEXOGRAPHYVECTOR SBCs are produced using aproprietary polymer synthesis technologythat allows for unprecedented controlof block copolymer composition andproperties. They are stable, narrowmolecular-weight styrenic block copolymersproduced using a sequential anionicpolymerization process. This processresults in a precise polymer that delivers theperformance required for the demandingprinting plate market. VECTOR SBCs areconsistent lot to lot and can accept avariety of additives such as oils, processaids, antiblock agents and colorants.HYGIENE ADHESIVESVECTOR and TAIPOL polymers may beformulated with suitable hydrocarbonresins, plasticisers and additives toproduce a wide range of hot-meltadhesives for manufacturing baby andadult diapers, feminine-care products andother nonwovens articles.VECTOR and TAIPOL SBS polymers areused in construction adhesives to laminatenonwoven backsheets to polyolefintopsheets. Their SBS and SIS polymersare used in core stabilization to produceultrathin absorbent cores with high SAPloading. Select VECTOR SIS polymersmake elastic attachment adhesivessuitable for adhering elastic componentsto polyolefin and nonwoven films forstretchable waist and leg bands.VECTOR SIS and TAIPOL SEBS polymersare used in feminine-care products forconstruction, positioning and core-stabilization adhesives.TAPE ADHESIVESVECTOR polymers lend themselves to awide range of hot-melt adhesive tapes withbi-axially oriented polypropylene (BOPP),paper, cloth and aluminum backings.For hot-melt tapes, SIS polymers offerexcellent PSA properties and work well witha range of coating lines.Pure triblock SIS VECTOR 4111 can beformulated with appropriate tackifiers forhigh-shear packaging and masking tapes.Diblock-containing SIS grades such asVECTOR 4113 and 4114 cover a wide rangeof tack/shear balances in tape applications.Radial SIS VECTOR 4230 and severaldevelopment grades increase the formulationlatitude for extreme low-viscosity, high-performance or low-cost formulas.6LABEL ADHESIVESVECTOR polymers lend themselves to a wide range of hot-melt, pressure-sensitive adhesive labels based on paper, film and aluminum substrates.For hot-melt labels, SIS polymers offer excellent pressure-sensitive adhesive properties and work well with a range of coating lines.SIS grades with low/medium diblock content such as VECTOR 4113 and 4114 cover a wide range of tack/shear balances in label applications.Radial, high-diblock SIS VECTOR 4186 and 4187 simplify the formulation and compounding of hot-melt, pressure-sensitive adhesives for high die-cutting speed and low oozing or bleeding.OTHER ADHESIVES, SEALANTS AND COATINGSVECTOR and TAIPOL formulations contribute to a diverse range of products used for manufacturing applications.SIS and SBS polymers are used to formulate hot-melt adhesives suited for the assembly of goods such as paper and other graphic arts products. They are also suitable for solvent-based adhesives for polyurethane foam assembly, such as upholstery. These SIS and SBS polymers are ideal for the formulation of high-solid-content adhesives, offering fast-drying, low-shrinkageproperties, along with reduced emissions.In construction sealants, SEBS blockpolymers provide outstanding thermal,ozone and UV stability. These fullysaturated block copolymers can beformulated as hot melts or with solvent.They are also suitable as modifiers andenhancers of butyl sealants. Formulationscan be transparent, but they can becolored and overpainted as needed.Thermoplastic compounds formulated withVECTOR 4113 can improve road-markingdurability, adhesion to asphalt and reflectiveretention at dosage rates as low as <2% wt.COMPOUNDINGVECTOR and TAIPOL SBCs providestrong performance features and benefitsfor manufacturing and production. Easilyprocessed and reasonably priced, they canbe mixed and compounded to meet yourrequirements, whether through single- ortwin-screw extrusion, injection or blowmoulding. Applications are diverse andinclude such things as ordinary householdgoods; sports equipment; auto parts; partsused in manufacturing industrial products,such as tool handles, grips and gaskets; andlow-voltage wires and cables.Our SBCs offer a broad hardness rangefrom 0 – 90 Shore A and good elasticperformance. They have excellent low-temperature properties and good hydrolysisresistance, with an available transparentgrade. They are also compatible withpolyolefinic- and styrenic-based plastics.PLASTIC MODIFICATIONVECTOR and TAIPOL SBCs are used ascompatibilizers and impact modifiers forthermoplastic polymers such as polystyrene,polypropylene and polyethylene. In theseapplications, SBCs offer distinct benefits,including good impact strength, enhancedelasticity, elongation and flexibility. They alsooffer excellent low-temperature properties.In some applications, particularlyautomotive, SEBS tends to be morepopular than SBS and SIS polymersbecause SEBS provides good heatresistance and UV resistance properties.TECHNOLOGY LEADERSInnovative ideas need effective resources to get off the ground. Our strengthlies in our ability to evaluate your goals, determine your requirements and provide you with solutions that support your success. Our research and development is led by our customers’ challenges.7TSRC / Dexco is expanding our global supply chain by leaps and bounds. We are one of the largest SBC producers in the world, with production bases and service teams strategically located throughout China, Taiwan, India, Europe and the U.S.Our Nantong, China, plant now produces our VECTOR SIS polymers, and we have plans to open another SIS plant in Taiwan in 2016.At the same time, we remain steadfastly committed to our responsibilities as good corporate citizens of the world. We place great emphasis on developing greener technology and processes in our efforts to minimize our impact on the environment and provide safer, more reliable products every day.BIGGER, GREENER, STRONGER THAN EVER NANTONG, CHINA, FACILITY NOW PRODUCING VECTORAs we expand internationally, we do so strategically, not simply adding facilities but adding new, differentiating technologies and making them available globally. To that end, our state-of-the-art plant in Nantong, China, is now also producing VECTOR, our high-per-formance SBC.8TSRC Corporation18F, 95, Sec. 2, Dunhua S. Road Taipei City 106, Taiwan R.O.C. Tel: +886 2 3701 6000Dexco Polymers12012 Wickchester Lane, Suite 280 Houston, TX 77079, U.S.A. Tel: 281 754 5800Toll Free: 877 251 0580info.americas@ D exco Polymers21255 LA Highway 1Plaquemine, LA 70765, U.S.A.T SRC (Lux.) Corporation S.a.r.l.34-36 Avenue de la LibertéL-1930 LuxembourgGrand Duchy of LuxembourgTel: +352 26 29 72 – 1info.europe@T SRC Corporation (Gangshan)No.39, Bengong 1st Rd., Gangshan Dist.,Kaohsiung City 820, Taiwan, R.O.C.Tel: +886 7 623 3005@TSRC Corporation (Kaohsiung)No.2 Singgong Rd., Dashe DistrictKaohsiung City 815, Taiwan R.O.C.TSRC (Nantong) Industrial Ltd.No.22 TongWang RoadNantong Economic andTechnological Development Zone,Nantong, Jiangsu, P.R.China(PC: 226017)Tel: +86 513 8599 9966info.china@Global Headquarters Sales Office Technology Center Manufacturing Location。
刚性链侧链型液晶高分子(甲壳型液晶高分子)研究进展*周其凤(北京大学化学学院高分子科学与工程系,北京,100871) 提要 普通的侧链型液晶高分子属柔性链高分子,而“甲壳型液晶高分子”虽从化学结构看属于侧链型液晶高分子,其性质却和典型的主链型液晶高分子相似,具有很大的分子链刚性。
本文介绍了“甲壳型液晶高分子”这一科学概念及其研究进展,并对尚待解决的问题进行了探讨。
关键词 液晶高分子,甲壳型液晶高分子,链刚性,聚[2,5-双(4’-甲氧基苯甲酰氧)苯乙烯],聚(乙烯基对苯二甲酸二苯酯),聚(乙烯基对苯二甲酸双环己酯),热致液晶,溶致液晶,构象持久长度引言笔者在《高分子通报》1991年第3期第160～161页发表了一篇题为“刚性侧链型液晶高分子与含二维液晶基元的液晶高分子”的短文,指出我们“曾在1987年提出了M esog en-J acketed Liquid Cr ystal Po lymer(M JL CP)的概念”,“M JL CP概括了一类新的液晶高分子。
这类高分子属于侧链型,可由烯类单体经链式聚合制得,因而容易得到高分子量产物,产物的分子量分布也有可能得到控制,因此具有上述柔性侧链型液晶高分子的一些优点,但是,与柔性侧链型液晶高分子不同的是,M JL CP分子中的刚性液晶基元是通过腰部或重心位置与主链相联结的,在主链与刚性液晶基元之间不要求联结基团或Spacer。
由于在这类液晶高分子的分子主链周围空间内刚性液晶基元的密度很高,分子主链被由液晶基元形成的外壳所包裹并被迫采取相对伸直的刚性链构象。
因此,我们可以将这类高分子称为刚性侧链型液晶高分子。
”值得注意的是,《高分子通报》编辑部在刊载这篇短文时破例加了一个[编者按]:“在本文中周其凤同志根据本人积累的研究经验和对液晶高分子结构的认识,提出了两个新概念,……并给出了相应的定义和实验依据,但有些学者认为含侧链的液晶高分子迄今尚无充分数据证实其为刚性侧链;……等不同异议,本刊将此文刊出的目的在于倡导创新活跃学术思维引起争论。
第24卷 第4期2009年8月液 晶 与 显 示Chinese Journal of Liquid Crystals and DisplaysVol 124,No 14Aug.,2009文章编号:100722780(2009)0420482205苯并噁唑类液晶的合成张建立1,2,尚洪勇1,2,梁 晓1,2,刘鑫勤1(1.石家庄永生华清液晶有限公司,河北石家庄 050091,E 2mail :zhangjl @ ;2.清华大学化学系,北京 100084)摘 要:自主设计了苯并噁唑类液晶的合成路线。
采用对烷基苯酚为起始原料,合成制得对烷基邻硝基苯酚,还原得到对烷基邻氨基苯酚,再与烷基苯氰在多聚磷酸脱水剂存在下合环得到2,52取代苯并噁唑类液晶化合物,并在此基础上进一步拓展,合成出了系列化合物。
标定了产品结构,测定了相关液晶参数,对液晶材料的性能进行了研究。
在所研究的液晶化合物中,有的品种已实现了量产。
关 键 词:苯并噁唑;液晶;多聚磷酸中图分类号:O753.2 文献标识码:A 收稿日期:2009202206;修订日期:2009204202 基金项目:国家“863”计划资助项目(No.2008AA03A304)1 引 言L CD 是显示市场的主流产品,其产品范围覆盖了从微显示器到大屏幕平板电视的全部领域。
随着液晶器件工作模式的发展,液晶材料也经历了一系列的变革。
为了追求更好的显示性能,人们不断对液晶材料提出更高的要求,如更低的驱动电压、更快的响应速度等。
在所有的液晶显示模式中,铁电液晶显示是响应速度最快的,其响应时间为微秒量级;而现在的L CD 产品即使采用响应速度最快的OCB 模式,其响应时间也达到几个毫秒。
所以,虽然在器件制造方面存在很大的难度,但人们一直没有放弃铁电液晶显示的研究。
苯并噁唑类液晶是一类尚处于研究阶段的强诱电性液晶材料[1,2],具有较好的应用前景。
制备苯并噁唑环的方法有很多,如酰氯法[2],硼酸和二乙二醇乙醚高温法,多聚磷酸法(PPA )[325],但各有其局限性。
制备四氧化三铁纳米颗粒的新方法傅小明;孙虎【摘要】以草酸亚铁(FeC2O4·2H2O)在高纯氩气(氩气含量≥99.999％)中的热重-差热(TG-DTA)分析为理论依据,利用X射线衍射仪(XRD)、热场发射扫描电子显微镜(SEM)和高分辨透射电子显微镜(TEM),分别对FeC2O4·2H2O在氩气中热分解最终产物进行物相和形貌表征.研究结果表明:FeC2O4·2H2O在高纯氩气中热分解过程分为两个阶段:第一个阶段是在室温到255℃之间,FeC2O4·2H2O失去结晶水变为FeC2O4;第二阶段是255℃到520℃之间,FeC2O4受热分解为Fe3O4.在高纯氩气中,以6℃/min升温速率从室温升520℃并在520℃,保温20 min,热分解草酸亚铁时,获得了粒径为约40～60 nm的球形Fe3O4颗粒.【期刊名称】《科学技术与工程》【年(卷),期】2016(016)006【总页数】4页(P191-194)【关键词】草酸亚铁;热分解;氩气;Fe3O4纳米颗粒【作者】傅小明;孙虎【作者单位】宿迁学院材料工程系,宿迁223800;宿迁学院材料工程系,宿迁223800【正文语种】中文【中图分类】TQ138.1化学工业2015年10月19日收到江苏省“六大人才高峰”高层次人才培养资助项目(2015-XCL-064)、江苏省第四期“333高层次人才工程”培养对象资助项目、江苏省高校自然科学研究基金项目(14KJB450001)、宿迁市科技计划项目(Z201421)和宿迁学院科研项目(2014KY06)资助四氧化三铁(又称磁铁矿，分子式为Fe3O4)是由O2-、Fe2+和Fe3+通过离子键组成的复杂离子晶体，它是一种典型的正铁酸盐化合物和重要的尖晶石型铁氧体，其晶体结构为立方反尖晶石结构[1—3]。
Fe3O4不仅具有优异的磁性能(比如，常用于信息存储、磁流体、微波吸收、磁共振成像和药物传递材料等)，还具有良好的催化性能(例如，用于水煤气变换反应、F-T合成、合成氨、丁烯和乙苯脱氢及氧化脱氢等方面的催化)[4—6]。
