【摘要】 继聚醚砜之后,研究了聚芳酯经热处理后其力学性能与形态结构变化的规律。结果表明与聚醚砜类似,经热处理后其力学性能特别是高温力学性能有显著提高。电镜的测试结果表明,这类主链含有苯环的刚性无定形高分子材料,在适当条件下进行热处理后,其聚集态结构都会形成某种局部有序结构,从而使其性能有显著提高。更多还原

【Abstract】 In this paper, mechanical properties and morphological structure of annealed polyaryl ester have been investigated by means of tensile test machine and transmission electron microscopy（TEM） respectively.Thin film of polyaryl ester, as follow structure was annealed at 180℃. The tensile strength of so treated film was determined at various temperature. It is posible to see that tensile strength increases, particularly at high temperatute （Fig.1） stress relaxation data determined at various temperatures show that annealing leads to a marked improvment of creep resistance （Fig.2）. For TEM determination, two series of sample were prepared. One series was casted from CHC1₂ CHC1₂（Sample 1）, the other from a mixture of CHC1₂ CHC1₂ and CHC1₃（Sample 2）. The samples were annealed at a given temperature but various time. Fig.4 shows the TEM diagrams of sample 1 before after annealing respectively. In Fig.4（4-4） it is possible to see that the annealed sample has some order structure. For sample 2, a similar phenomenon could be seen （Fig.5（5-4）） but morphology and ordering rate are quite different.更多还原