甲醛用量对苯并恶嗪树脂合成反应的影响
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甲基环戊二胺型苯并噁嗪合成及其与环氧树脂固化体系热稳定性的比较∗袁伟;史铁钧;李明;钱莹;陈杨【摘要】分别用苯酚(Ph)和壬基酚(NP)与多聚甲醛,对甲基环戊二胺(TAC)进行曼尼希反应,制备出来两种不同结构的甲基环戊二胺型苯并噁嗪分别简称为 TPBZ、TNBZ,然后将两种苯并噁嗪与环氧树脂共混固化并和原料TAC与环氧树脂共混固化比较.用FT-IR、1 H NMR分析了两种苯并噁嗪的化学结构;用DSC对共混固化体系特性进行研究,用 TGA 分析了固化物的热稳定性.结果表明,固化物 TPBZ/EP 的热分解温度比固化物TAC/EP提高32℃,最大失重速率温度提高58℃,700℃残炭率提高11.2%,固化物 TNBZ/EP 的热分解温度比固化物TAC/EP提高42℃,最大失重速率温度提高56℃.%Two different containging-cyclopentana benzoxazine (abbreviated as TPBz and TNBz)were synthe-sized in this paper,and the raw material phenol (Ph)and nonylphenol (NP)were used to take the Mannich re-action with paraformaldehyde and methylcyclopentyl diamine (TAC),respectively.The chemical structure of TPBz and TNBz was characterized by FT-IR and 1 H NMR.Then blending TPBz and TNBz with epoxy resin and curing,which were compared with the blend curing system of material TAC and epoxy resin.The blend charac-teristics of curing system were studied by DSC,and the thermal stability of which was analyzed by TGA.The result demonstrated that the thermal decomposition te mperature of TPBz/EP increased 32 ℃ than that of TAC/EP.the temperature of maximum weight loss rate increased 58 ℃,and the carbon residue at 700 ℃ increased 11.2%,respectively.About TNBz/EP,its thermaldecomposition temperature increased 42 ℃,and temperatu re of maximum weight loss rate increase 5 6 ℃.【期刊名称】《功能材料》【年(卷),期】2016(047)010【总页数】6页(P10213-10217,10224)【关键词】甲基环戊二胺;苯并噁嗪;环氧树脂;热稳定性;热固性树脂【作者】袁伟;史铁钧;李明;钱莹;陈杨【作者单位】合肥工业大学化学与化工学院,合肥 230009;合肥工业大学化学与化工学院,合肥 230009;合肥工业大学化学与化工学院,合肥 230009;合肥工业大学化学与化工学院,合肥 230009;合肥工业大学化学与化工学院,合肥230009【正文语种】中文【中图分类】O631甲基环戊二胺(TAC)具有饱和的五元环结构,作为环氧树脂的固化剂,具有与聚醚胺结构类似的空间构象多、柔顺性好特点,同时又具有芳香胺环状结构的刚性和强度,与环氧树脂的固化产物力学性能优良,色度和光泽优于脂肪胺和聚酰胺, 通过合理的结构设计有望结合强度和韧性于一身[1-3]。