以自制苯酚-亚联苯型酚醛树脂、环氧氯丙烷为主要原料,采用固体碱作为醚化阶段催化剂,合成了一种苯酚-亚联苯型环氧树脂。借助红外光谱(FTIR)、核磁共振光谱(1 H NMR和13C NMR)、凝胶渗透色谱(GPC)分别对产物的结构、组成和分子量进行...以自制苯酚-亚联苯型酚醛树脂、环氧氯丙烷为主要原料,采用固体碱作为醚化阶段催化剂,合成了一种苯酚-亚联苯型环氧树脂。借助红外光谱(FTIR)、核磁共振光谱(1 H NMR和13C NMR)、凝胶渗透色谱(GPC)分别对产物的结构、组成和分子量进行了表征,结果成功制备了苯酚-亚联苯型环氧树脂,相对分子质量为870,环氧当量为274g/eq。此外,将所得苯酚-亚联苯型环氧树脂用于环氧模塑料中,并与市售环氧树脂所得的模塑料进行比较,借助热失重分析仪(TGA)、热机械分析仪(TMA)等对模塑料的主要性能进行研究,结果表明含有苯酚-亚联苯型环氧树脂的模塑料具有较长的凝胶时间和流动长度,具有较高的Tg(142℃)以及较高的初始降解温度(413℃),完全可以满足无铅焊料的加工工艺要求,并具有较好的弯曲强度和弯曲模量。展开更多
To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-de...To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-2500 g/mol derived from 4,4’-(hexafluoroisopropylidene)diphthalic anhydride(6 FDA),3,4’-oxydianiline(3,4’-ODA)and m-phenylenediamine(m-PDA).This blend shows low minimum melting viscosity(<1 Pa·s)and enlarged processing temperature window(260–361℃).FPI-R-1 stays below 1 Pa·s for2 h at 270℃.The relationship between the molecular weight of the blend and its melting stability was first explored.Blending oligoimides with lower molecular weights exhibit better melting stability.Upon curing at 380℃for 2 h,the thermosetting polyimide resin demonstrates superior heat resistance(T_(g)=420-426℃).展开更多
文摘以自制苯酚-亚联苯型酚醛树脂、环氧氯丙烷为主要原料,采用固体碱作为醚化阶段催化剂,合成了一种苯酚-亚联苯型环氧树脂。借助红外光谱(FTIR)、核磁共振光谱(1 H NMR和13C NMR)、凝胶渗透色谱(GPC)分别对产物的结构、组成和分子量进行了表征,结果成功制备了苯酚-亚联苯型环氧树脂,相对分子质量为870,环氧当量为274g/eq。此外,将所得苯酚-亚联苯型环氧树脂用于环氧模塑料中,并与市售环氧树脂所得的模塑料进行比较,借助热失重分析仪(TGA)、热机械分析仪(TMA)等对模塑料的主要性能进行研究,结果表明含有苯酚-亚联苯型环氧树脂的模塑料具有较长的凝胶时间和流动长度,具有较高的Tg(142℃)以及较高的初始降解温度(413℃),完全可以满足无铅焊料的加工工艺要求,并具有较好的弯曲强度和弯曲模量。
基金financially supported by the National Natural Science Foundation of China(No.51803222)Science and Technology Service Network Initiative,Chinese Academy of Sciences。
文摘To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-2500 g/mol derived from 4,4’-(hexafluoroisopropylidene)diphthalic anhydride(6 FDA),3,4’-oxydianiline(3,4’-ODA)and m-phenylenediamine(m-PDA).This blend shows low minimum melting viscosity(<1 Pa·s)and enlarged processing temperature window(260–361℃).FPI-R-1 stays below 1 Pa·s for2 h at 270℃.The relationship between the molecular weight of the blend and its melting stability was first explored.Blending oligoimides with lower molecular weights exhibit better melting stability.Upon curing at 380℃for 2 h,the thermosetting polyimide resin demonstrates superior heat resistance(T_(g)=420-426℃).
