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| 改性等规聚丙烯的熔体形态和晶形变异研究 | |
| 引用本文： | 董擎之 郭群. 改性等规聚丙烯的熔体形态和晶形变异研究[J]. 合成纤维工业, 1999, 22(4): 1-4 |
| 作者姓名： | 董擎之 郭群 |
| 作者单位： | 华东理工大学石油化工学院化学工程系上海 |
| 基金项目： | 中国石油化工集团公司资助 |
| 摘 要： | 采用凝胶渗透色谱（ＧＰＣ）、光学偏光显微镜、光学解偏仪、差热扫描量热法（ＤＳＣ）、热重分析（ＴＧＡ）等方法，研究了等规聚丙烯（ＩＰＰ）经化学降解后的相对分子质量、相对分子质量分布、结晶形态与热性能的变化。讨论了改进剂使ＩＰＰ相对分子质量分布变窄的机理，分析了熔体在相对静止状态及受力流动时分子运动的影响因素。发现ＩＰＰ经化学降解后存在β晶型的织构 |
| 关 键 词： | 化学 降解 等规聚丙烯 结晶 机理 |
STUDY ON MELT MORPHOLOGY AND CRYSTAL MORPHOLOGICAL VARIATION OF CHEMICALLY DEGRADED MODIFIED ISOTACTIC POLYPROPYLENE |
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| Dong Qingzhi and Guo Qun. STUDY ON MELT MORPHOLOGY AND CRYSTAL MORPHOLOGICAL VARIATION OF CHEMICALLY DEGRADED MODIFIED ISOTACTIC POLYPROPYLENE[J]. China Synthetic Fiber Industry, 1999, 22(4): 1-4 | |
| Authors: | Dong Qingzhi and Guo Qun |
| Abstract: | Molecular weight, distribution of molecular weight, crystal morphological feature and thermal properties of chemically degraded isotactic polypropylene (IPP) were studied by gel permeation chromatography, polarized microscope, depolarization device, differential scanning calorimetry and thermal gravimetric analysis. The mechanism of MWD changing narrower after chemical degradation was discussed. The influential factors that bear a direct relation to the melt molecular movement in relative static condition or flowing condition at pressure were analyzed. The β crystalline texture was discovered in chemically degraded IPP. |
| Keywords: | chemistry degradation isotactic polypropylene crystallize mechanism |
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