| 聚丙烯管材专用料的熔体降解及其对力学性能的影响 |
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| 引用本文： | 丁健,丁雪佳,徐日炜,余鼎声,梁亚辉. 聚丙烯管材专用料的熔体降解及其对力学性能的影响[J]. 塑料工业, 2004, 32(7): 48-50 |
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| 作者姓名： | 丁健 丁雪佳 徐日炜 余鼎声 梁亚辉 |
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| 作者单位： | 北京化工大学材料学院,北京,100029;扬子石油化工股份有限公司塑料厂,江苏,南京,210048 |
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| 摘 要： | 在双螺杆挤出机中，对无规共聚聚丙烯(PP-R)和嵌段共聚聚丙烯(PP-B)管道专用料的熔体降解行为及其对力学性能的影响进行了研究；对助剂量、熔体温度等工艺条件对降解行为的影响进行了讨论。结果表明：降低熔体温度，可明显降低PP-R和PP-B的热降解速率；降解优先发生在长链分子，导致摩尔质量减小，摩尔质量分布变窄，力学性能下降。
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| 关 键 词： | 无规共聚聚丙烯 嵌段共聚聚丙烯 双螺杆挤出 降解控制 力学性能 |
| 文章编号： | 1005-5770(2004)07-0048-03 |
| 修稿时间： | 2004-04-13 |
Study on Melt Degradation and Its Influence on Mechanical Properties of PP Pipe Compound |
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| DING Jian ,Ding Xue-jia ,XU Ri-wei ,YU Ding-sheng ,LIANG Ya-hui. Study on Melt Degradation and Its Influence on Mechanical Properties of PP Pipe Compound[J]. China Plastics Industry, 2004, 32(7): 48-50 |
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| Authors: | DING Jian Ding Xue-jia XU Ri-wei YU Ding-sheng LIANG Ya-hui |
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| Affiliation: | DING Jian 1,Ding Xue-jia 1,XU Ri-wei 1,YU Ding-sheng 1,LIANG Ya-hui 2 |
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| Abstract: | The degrading behavior during extrusion in a twin-screw extruder of model ZSK-300 and its influence on the mechanical properties of PP-R and PP-B for pipe compounds were studied. The effects of stabilized agent,MFR and melt temperature on degrading behavior were discussed. The results showed the degrading rate markedly decreased only if the melt temperature of PP-R and PP-B decreased. The degradation was favor for the longer molecule chains,resulted in decrease of molecular weight,narrow MWD and worse of mechanical properties. |
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| Keywords: | PP-R PP-B Twin-screw Extrusion Degradation Control Mechanical Properties |
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