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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Polymerization and decomposition of terephthaloyl chloride and p-phenylenediamine at 500 degrees C
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Polymerization and decomposition of terephthaloyl chloride and p-phenylenediamine at 500 degrees C

机译：在500℃下聚合和分解对苯二甲酰氯和对苯二胺的聚合和分解

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摘要

In order to synthesize the high temperature solid lubricating film by gas-phase polymerization at 500 degrees C with two kinds of gasified monomers for use in airplane and rocket engines, the polymerizing activity of terephthaloyl chloride (TPC) and p-phenylenediamine (PPD) at 500 degrees C and their polymerized product poly-p-phenyleneterephthamide (PPTA) as well as its decomposed solid residues were researched. It was proved by FT-IR and (HNMR)-H-1 on the solid residues after the 10 min experiment of the both monomers in muffle furnace at 500 degrees C and PPTA synthesized by conventional method that at 500 degrees C the polymerization tendency of these monomers should trump their decomposition tendency. The solid residues after the 10 min experiment mainly consisted of polymerized products which would decline as the experimental period increases, while the content of decomposed and carbonized products would raise. FT-IR and elemental analysis revealed a similar structure of the solid residues after the both monomers or PPTA calcined for 60 min at 500 degrees C, which further demonstrated the polymerized products would degrade, decompose and carbonize after the prophase polymerization. Finally, effects of experimental temperature and monomers molar ratio on amounts and structures of the solid residues were discussed to propose preliminary mechanisms of polymerization and decomposition.
机译：为了在500℃下用500℃的气相聚合合成高温固体润滑膜，用于飞机和火箭发动机的两种气化单体，对苯甲酰氯化物（TPC）和对苯二胺（PPD）的聚合活性。研究了500℃及其聚合产物聚 - 苯二乙酰杀硫酰胺（PPTA）以及其分解的固体残基。通过常规方法在500摄氏度的10℃和PPTA中，通过常规方法在500℃和PPTA的10℃和PPTA中进行固体残留物，在固体残留物上得到固体残留物。这些单体应该胜过他们的分解倾向。 10分钟实验后的固体残留物主要由实验期随着实验期增加而下降的聚合产物组成，而分解和碳化产品的含量会提高。 FT-IR和元素分析揭示了在500℃下煅烧60分钟的单体或PPTA之后的固体残留物的类似结构，这进一步证明了聚合产物在预选聚合后降解，分解和碳化。最后，讨论了实验温度和单体摩尔比对固体残余物的量和结构的影响，提出了聚合和分解的初步机制。

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