摘要
合成了２，２′－亚甲基－二（４－甲基－６－烯丙基）苯酚，用它增韧二苯甲烷型双马来酰亚胺树脂，对改性双马来酰亚胺预聚物的凝胶化时间、ＤＳＣ分析和ＦＴ－ＩＲ分析的研究，得到了改性双马来酰亚胺树脂体系的固化条件为１８０℃／１ｈ＋２００℃／２ｈ＋２５０℃／４ｈ；热重分析法研究了双马来酰亚胺树脂体系的热分解反应动力学，得出体系的热分解反应活化能为２７４．４ｋＪ／ｍｏｌ；改性双马来酰亚胺树脂体系常温弯曲强度为１２４ＭＰａ，弯曲模量为３７７４．６ＭＰａ，２５０℃下弯曲强度保留６９％，弯曲模量保留７８％。
2,2′-methylene-bis[4-methyl-6-(2-propenyl)]phenol was synthesized and was used to toughen methylene dianiline bismaleimide resin. The curedcondition of modified bismaleimide resin was studied by gel time of prepolymer under various temperature, DSC and FT-IR analysis, and the curing cycle of the modified bismaleimide was 180 ℃/1 h+200 ℃/2 h+250 ℃/4 h; the kinetic study of thermal degradation for the modified bismaleimide resin was also researched by thermal gravity analysis. The activation energy of the thermal degradation reaction is 274.4 kJ/mol; the flexural strength of modulus of the modified bismaleimide resin are 124 MPa and 3774.6 MPa at 25 ℃, and are retained 69% and 78% at 250 ℃, respectively.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第2期86-89,93,共5页
Polymer Materials Science & Engineering
关键词
双马来酰亚胺
固化
热分解
性能
改性
bismaleimide resins, toughener, curedcondition, thermal degradation reaction, flexural properties
