Imidization processes of aromatic polyimide by temperature modulated DSC
Imidization processes of aromatic polyimide by temperature modulated DSC
复制标题
DOI：
10.1016/s0032-3861(99)00546-7
复制
发表时间：
2000-05-01
期刊：
影响因子：
4.6
通讯作者：
Nakamae, K
中科院分区：
文献类型：
--
作者：
Kotera, M;Nishino, T;Nakamae, K
由聚酰胺酸（PAA）前体制备聚酰亚胺（PI）涉及同时进行酰亚胺化、蒸发残余溶剂和结晶。这些重叠的过程进行了分析，温度调制差示扫描量热法（T-MDSC）。用T-MDSC测定了前驱体PAA的玻璃化转变温度（Tg），由N-甲基-2-吡咯烷酮（NMP）溶液浇铸的均苯四甲酸二苯胺（PMDA-ODA）PAA的Tg为107 ℃。从PAA到PI的热环化反应被认为是随机进行的。流延PAA的溶剂系统影响PI的转化率，这被发现影响PAA的T-g。(C)2000爱思唯尔科技有限公司版权所有。
Processing of polyimide (PI) from precursor polyamic acid (PAA) involves simultaneous imidization, evaporation of residual solvent and crystallization. These overlapped processes were analyzed by temperature modulated differential scanning calorimetry (T-MDSC). Glass transition temperature (Tg) Of precursor PAA was manifested by T-MDSC, and it was 107 degrees C for pyromellitic dianhydride-oxidianiline (PMDA-ODA) PAA cast from N-methyl-2-pyrrolidone (NMP) solution. The thermal cyclization reaction from PAA to PI is considered to progress randomly. The solvent system for casting PAA, influenced the conversion to PI, which is found to affect the T-g of PAA. (C) 2000 Elsevier Science Ltd. All rights reserved.