环氧基封端聚硅氧烷改性酚醛树脂的研究  

Study on Copolymerization of Epoxy-terminated Polydimethylsiloxane and Phenolic Resin

作　　者：秦争[1] 孙勇飞[2] 吴新锋[3] 刘国玲[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200444 [2]上海化工研究院,上海200062 [3]上海海事大学海洋材料科学与工程研究院,上海201306

出　　处：《塑料工业》2014年第12期37-39,82,共4页China Plastics Industry

基　　金：长江学者和创新团队发展计划资助(IRT13078);上海市科委火炬计划资助(07DZ11102)

摘　　要：通过低聚环氧基封端聚硅氧烷(E-PDMS)与甲醛和苯酚的共聚合反应,制备了增韧改性酚醛树脂。用傅里叶红外光谱、电子万能试验机和热重分析仪表征了共聚产物的结构、改性前后酚醛树脂的力学性能和热稳定性;研究了4种不同摩尔质量的E-PDMS对改性酚醛树脂力学性能的影响。结果表明,改性酚醛树脂的冲击强度和拉伸强度优于未改性酚醛树脂;E-PDMS(环氧当量950 g/mol)改性酚醛树脂失重20%的温度、峰值温度及残炭率(800℃)均高于纯酚醛树脂,分别为448℃、572.9℃和55.6%;低摩尔质量的E-PDMS有利于酚醛树脂的改性。A copolymer of low molecular weight epoxy-terminated polydimethylsiloxane （E-PDMS） and toughing modified phenolic resin was synthesized by E-PDMS, phenol and formaldehyde. The structure, mechanical properties and thermal stability of the copolymer before and after modification were examined by FT-IR, electronic universal testing machine and TG-DTA thermal analyzer. The effects of four different relative molecular mass of E-PDMS on the mechanical properties of the modified phenolic resin were studied. The results showed that the impact strength and tensile strength of copolymer was better than those of PF. The temperature of E-PDMS （950 g/mol） modified phenolic resin 20% weight loss, the peak temperature and residual coke yield at 800 ℃ of the modified resin were 448 ℃, 572.9 ℃, and 55.6% respectively. Small molecular weight of E-PDMS was beneficial to modification of PF.

关 键 词：酚醛树脂 环氧基封端聚硅氧烷 共聚合 改性 力学性能 热稳定性 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]