文献类型：期刊文献

中文题名：4,4′-联苯二酚改性热固性酚醛树脂的制备及其热性能

英文题名：Preparation and Thermal Properties of 4,4′-Biphenyol Modified Thermosetting Phenolic Resin

作者：刘辉[1];刘育建[1];张衍[1];方俊[1]

机构：[1]华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室,上海200237

年份：2018

卷号：36

期号：4

起止页码：578

中文期刊名：材料科学与工程学报

外文期刊名：Journal of Materials Science and Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金资助项目(51303054);上海市重点学科资助项目(B502)

语种：中文

中文关键词：酚醛树脂;4;4′-联苯二酚;热性能;残炭率

外文关键词：Phenolic resin;4;4＇-biphenol;thermal performance;char yield

摘要：采用4,4′-联苯二酚(4,4′-BPF)、苯酚、烷基酚和甲醛制备了热固性的4,4′-联苯二酚改性酚醛树脂(4,4′-BPFR)。通过红外光谱仪(FT-IR)、凝胶渗透色谱法(GPC)对合成树脂的结构及分子量进行了表征,并进一步研究了4,4′-联苯二酚用量对改性树脂的凝胶时间、粘度、游离酚、残炭率的影响。结果表明,当苯酚∶4,4′-联苯二酚的摩尔比为1∶0.07时,树脂体系中羟甲基指数和醚键指数最低,分子量分布指数从未改性的3.31降低到1.83,分子组成中含3~8个芳环的聚合物含量占44.5%,改性树脂的粘度和游离酚含量较低,残炭率达到65.7%。同时,采用热重分析仪(TGA)及裂解气相色谱质谱(Py-GC/MS)研究了改性酚醛树脂的热性能。结果表明,改性酚醛树脂在800℃的残炭率比普通酚醛树脂(n-PFR)提高了9.67%,改性酚醛树脂失重5%时的温度比普通酚醛树脂提高62.1℃。650℃时4,4′-BPFR裂解产物含量比普通酚醛少,说明改性后树脂成炭率提高,树脂热稳定性优于普通酚醛树脂。
Thermosetting 4,4′-biphenol phenolic resin（4,4′-BPFR）was synthesized by 4,4′-biphenol,phenol,alkyl phenol and formaldehyde.The structure,molecular weight and molecular weight distribution were characterized by FT-IR,GPC respectively,effect of 4,4′-biphenyl content on the gel time,viscosity,free phenol,char yield were investigated.The results show that,when Phenol：4,4′-biphenol molar ratio is 1∶0.07,molecular weight distribution is reduced from 3.31 to 1.83 compared with unmodified resin,Polymers containing 3 to 8 aromatic rings account for 44.5%of the total molecular composition,viscosity and free phenol are lower,the char yield reach 65.7%.Meanwhile,The thermal properties were characterized using TGA and Py-GC/MS.The char yield of 4,4′-BPFR increase by 9.67% compared with normal phenolic resin（n-PFR）at800℃,the 5% weight loss temperature of 4,4′-BPFR increases by 62.1℃ relative to that of the normal phenolic resin.The pyrolysis volatiles of 4,4′-BPFR are less than n-PFR,and the thermal stability is significant better than n-PFR.