V. Svetlichnyi, I. Gofman, A. Didenko, Elena Vlasova
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引用次数: 0
摘要
用在n -甲基-2-吡啶酮溶液中两步合成和一步高温合成的聚-[4,4′-双(4′- n -苯氧基)联苯砜]亚胺1,3-双(3′，4-二羟基苯氧基)苯薄膜样品，研究了该可溶性聚酰亚胺在250 ~ 300℃温度范围内链间交联的形成。就在这个区域，不同的聚酰亚胺材料在加工过程中进行最后阶段的热处理。提出了一种可能的交联形成机制，以充分解释工作中获得的实验数据。为避免上述不利影响，提出了一种简单的工艺方法。*通信:Iosif Gofman，大分子化合物研究所，俄罗斯科学院，31,Bol 'shoi str. (V.O.)，圣彼得堡，199004，俄罗斯，电话:+7(812)328-8511;电子邮件:gofman@imc.macro.ru
Formation of branched structure of polyimide macromolecules in the temperatures range below the onset of the thermal destruction
The film samples of poly-[4,4'-bis(4"-N-phenoxy)biphenyl-sulfone]imide1,3-bis(3',4-dicarboxyphenoxy)benzene obtained both by two-step synthesis and by onestep high temperature synthesis in N-methyl-2-pyrrolidone solution were used to study the formation of the interchain crosslinks in this soluble polyimide in the temperature range of 250-300°C. Just in this region a final stage of the thermal treatment of different polyimide materials takes place during their processing. A possible crosslink formation mechanism has been put forward to present the adequate explanation of the experimental data obtained in the work. A simple technological way is offered to avoid the unfavourable effect above. *Correspondence to: Iosif Gofman, Institute of Macromolecular Compounds, Russian Academy of Sciences, 31, Bol’shoi str. (V.O.), St. Petersburg, 199004, Russia, Tel: +7(812)328-8511; E-mail: gofman@imc.macro.ru
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