| 动态硫化对三元乙丙橡胶/聚丙烯共混体系等温结晶行为和形态结构的影响 |
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| 引用本文： | 王春玮,李超芹.动态硫化对三元乙丙橡胶/聚丙烯共混体系等温结晶行为和形态结构的影响[J].合成橡胶工业,2012,35(2):124-127. |
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| 作者姓名： | 王春玮 李超芹 |
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| 作者单位： | 青岛科技大学高性能聚合物及成型技术教育部工程研究中心,山东青岛,266042 |
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| 摘 要： | 研究了三元乙丙橡胶/聚丙烯(EPDM/PP)共混物和动态硫化EPDM/PP热塑性弹性体(TPV)的等温结晶行为及形态结构,并用Avrami方程对其进行等温结晶动力学分析。结果表明,EPDM/PP共混物和EPDM/PP TPV的等温结晶行为符合Avrami方程,在相同的结晶温度下,TPV比共混物的Avrami指数小,半结晶时间短,结晶速率常数大;EPDM/PP共混物为双连续相结构,而EPDM/PP TPV是以硫化的细小橡胶颗粒为分散相、PP为连续相的"海-岛"结构,橡胶颗粒尺寸约为0.5μm。
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| 关 键 词： | 三元乙丙橡胶 聚丙烯 动态硫化 共混 等温结晶 形态结构 |
Effect of dynamic vulcanization on isothermal crystallization behavior and morphology of ethylene propylene diene monomer/polypropylene blend system |
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| WANG Chun-wei
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LI Chao-qin.Effect of dynamic vulcanization on isothermal crystallization behavior and morphology of ethylene propylene diene monomer/polypropylene blend system[J].China Synthetic Rubber Industry,2012,35(2):124-127. |
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| Authors: | WANG Chun-wei LI Chao-qin |
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| Affiliation: | (Engineering Research Center of High Performance Polymer and Molding Technology of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China) |
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| Abstract: | The isothermal crystallization behavior and morphology of dynamic vulcanized ethylene propylene diene monomer/polypropylene(EPDM/PP TPV) and EPDM/PP blends were investigated,and the Avrami equation was employed to analyze isothermal crystallization kinetics of EPDM/PP TPV and EPDM/PP blends.The results showed that Avrami equation was satisfied for describing the crystallization behavior of the two materials and at the same crystallization temperature,compared with the blends,the TPV had a smaller Avrami exponent,shorter crystallization half-time,and a higher crystallization rate constant.EPDM/PP blends had a continuous structure in morphology,while EPDM/PP TPV had a ’sea-island’ structure where the vulcanized EPDM particles with about 0.5 μm diameter dispersed in the continuous phase of PP matrix. |
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| Keywords: | ethylene propylene diene monomer polypropylene dynamic vulcanization blending isothermal crystallization morphology |
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