化工时刊
化工時刊
화공시간
CHEMICAL INDUSTRY TIMES
2015年
5期
3-6
,共4页
刘爽%郑华明%郭俊芳%郭庆中
劉爽%鄭華明%郭俊芳%郭慶中
류상%정화명%곽준방%곽경중
芳香环状齐聚物%开环聚合%共聚物
芳香環狀齊聚物%開環聚閤%共聚物
방향배상제취물%개배취합%공취물
Aromatic macrocyclic oligomers%Ring - opening polymerization%Copolymer
两种芳香环状聚酯二聚体 CPA 和6FCPA,在阴离子引发剂苯甲酸钠的存在下,进行熔融开环共聚合,制备线性共聚酯。利用 NMR、DSC、TGA 对开环聚合产物进行了表征,结果表明,共聚产物为无规共聚物,共聚物和均聚物的Tg 之间的关系符合 FOX 方程。开环聚合产物的5%热失重温度均高于370℃,表明产物均具有良好的热稳定性。
兩種芳香環狀聚酯二聚體 CPA 和6FCPA,在陰離子引髮劑苯甲痠鈉的存在下,進行鎔融開環共聚閤,製備線性共聚酯。利用 NMR、DSC、TGA 對開環聚閤產物進行瞭錶徵,結果錶明,共聚產物為無規共聚物,共聚物和均聚物的Tg 之間的關繫符閤 FOX 方程。開環聚閤產物的5%熱失重溫度均高于370℃,錶明產物均具有良好的熱穩定性。
량충방향배상취지이취체 CPA 화6FCPA,재음리자인발제분갑산납적존재하,진행용융개배공취합,제비선성공취지。이용 NMR、DSC、TGA 대개배취합산물진행료표정,결과표명,공취산물위무규공취물,공취물화균취물적Tg 지간적관계부합 FOX 방정。개배취합산물적5%열실중온도균고우370℃,표명산물균구유량호적열은정성。
Two kinds of aromatic macrocyclic ester dimers prepared from o - phthaloyl dichloride and 4,4’ -(hexafluoroisopropylidene) diphenol or BPA could undergo anionic ring opening copolymerization in the melt using sodium benzoate as the initiator,producing linear, high molecular weight polyesters. The Tgs of homopolymers and co-polymer were at accord with the FOX equation. The results of DSC and NMR analysis showed that the copolymer was random. The 5% weight loss temperatures of homopolymers and copolymer were all higher than 370 ℃, which indica-ted that the products obtained by ROP were thermally stable.