| 等规聚丙烯/炭黑等温结晶过程中流变与导电行为的关联与同步测试 |
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| 引用本文： | 刘志华,宋义虎,郑强,曹青.等规聚丙烯/炭黑等温结晶过程中流变与导电行为的关联与同步测试[J].中国新闻周刊,2009(2). |
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| 作者姓名： | 刘志华 宋义虎 郑强 曹青 |
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| 作者单位： | 浙江大学高分子科学与工程学系 |
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| 基金项目： | 国家自然科学基金(基金号20774085)资助项目 |
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| 摘 要： | 采用流变-导电行为同步测试方法,研究了等规聚丙烯(iPP)/炭黑(CB)复合体系的等温结晶行为,发现当CB体积含量φCB远高于渗流转变上限时,其体系的流变行为与导电性能均在某一特征时间处发生突变,电阻突变的特征时间短于动态储能模量(G′)或法向应力(FN)突变的特征时间,表明结晶诱导期存在CB粒子运动,促使CB粒子在晶粒尺寸增长期形成渗流网络;另一方面,与静态方法相比较,动态方法所测特征时间较短,表明动态方法对体系结晶结构变化的响应较静态方法更为灵敏.
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| 关 键 词： | 流变-导电行为同步测试 等规聚丙烯/炭黑复合材料 等温结晶 |
STUDY ON CORRELATION BETWEEN RHEOLOGICAL AND CONDUCTIVE BEHAVIOR THROUGH SIMULTANEOUS MEASUREMENTS DURING ISOTHERMAL CRYSTALLIZATION FOR CARBON BLACK FILLED ISOTACTIC POLYPROPYLENE |
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| LIU Zhihua; SONG Yihu; ZHENG Qiang; CAO Qing.STUDY ON CORRELATION BETWEEN RHEOLOGICAL AND CONDUCTIVE BEHAVIOR THROUGH SIMULTANEOUS MEASUREMENTS DURING ISOTHERMAL CRYSTALLIZATION FOR CARBON BLACK FILLED ISOTACTIC POLYPROPYLENE[J].China Newsweek,2009(2). |
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| Authors: | LIU Zhihua; SONG Yihu; ZHENG Qiang; CAO Qing |
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| Institution: | LIU Zhihua; SONG Yihu; ZHENG Qiang; CAO Qing(Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027); |
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| Abstract: | The kinetics of isothermal crystallization for isotactic polypropylene(iPP) containing different volume fraction(φ_(CB)) of carbon black(CB) was evaluated by using differential scanning calorimetry(DSC) at 137.5℃,139.5℃ and 141.5℃ with moderate rates of crystallization.Simultaneous measurements of rheological and conduction behaviors were performed to probe the process of isothermal crystallization in dynamic and static modes.It was found that when CB volume fraction φ_(CB) was 0.09,the characteristic time ... |
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| Keywords: | Simultaneous measurement of rheological and conduction behaviors Isotactic polypropylene Carbon black Composites Isothermal crystallization |
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