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DSC法对动态硫化PP/EPDM中PP—EPDM共交联结构的研究 预览 被引量:9

Study on the PP EPDM Co crosslinking Structure in Dynamically Vulcanized PP/EPDM Blend by Differential Scanning Calorimetry
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摘要 根据共交联PP分子与正常PP分子在结晶与熔融特征及其对外因素响应上的差异,采用DSC分析方法,研究了动态硫化PP/EPDM中PP-EPDM共交联结构。结果显示在动态硫化PP-EPDM的熔融DSC曲线上的150℃曲线上约150℃处出现一新的熔融峰,改变结晶速率或DSC测试程序,可发现形成这一新峰的化学结构具有强烈的结晶滞后性,而简单共混PP/EPDM的DSC曲线上始终未出现类似新峰。结合化学反应理论 Based on the differences of crystallizing and melting characteristics between co crosslinking molecules and normal molecules of PP,the PP/EPDM co crosslinking structure in dynamically vulcanized PP/EPDM blend is investigated by means of the differential scanning calorimetry (DSC).The results show that a new melting peak is formed at the DSC curve of dynamically vulcanized PP/EPDM blend about 150℃ .As the crystallizing speed or the DSC test program is changed, the chemical structure which forms the new melting peak has strong hysteresis effect in cryistallization.But the DSC curves of unvulcanized PP/EPDM blends have no same new melting peak.According to chemical reaction theory, the DMA and SEM resullts show that the new melting peak at the DSC curve is the melting peak of the crystallization of PP/EPDM co crosslinking molecules and the co_crosslinking reaction between PP and EPDM really exists in the dynamically vulcanized PP/EPDM blend.
作者 吴唯 Wu Wei (Petrochemical Institute , East China University of Science and Technology, Shanghai 201512)
出处 《中国塑料》 CAS CSCD 北大核心 1999年第7期18-24,共7页 China Plastics
关键词 共交联 DSC法 硫化 聚丙烯 三元乙丙橡胶 结构 DSC,Co_crosslinking, Dynamic vulcanization ,Polypropylene,Ethylene propylenediene tmischpolymer.
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