| 郭鹏,徐耀辉,吕明福,张师军.化学通报,2015,78(2):164-169. |
| 高熔体强度聚丙烯及发泡珠粒的制备与研究 |
| Fabrication and investigation of high melt strength polypropylene and its foams |
| 投稿时间：2014-06-09 修订日期：2014-07-15 |
| DOI： |
| 中文关键词: 聚丙烯, 熔体强度, 发泡聚丙烯, 泡孔结构 |
| 英文关键词:Polypropylene, Melt strength, Expanded polypropylene, Cellular structure |
| 基金项目:国家科技支撑计划课题(2011BAE26B04)和中国石化科技开发项目(G6001-14-ZS-0464)资助 |
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| 中文摘要: |
| 使用直接聚合法制备了高熔体强度聚丙烯,该聚丙烯具有宽的分子量分布及较高的熔体强度,可有效解决聚丙烯在发泡过程中泡孔破裂的问题。利用反应釜浸渍法以上述高熔体强度聚丙烯为基础树脂可以制备聚丙烯发泡珠粒。利用扫描电子显微镜和熔体强度测试仪考察了聚丙烯发泡珠粒的制备工艺及基础树脂的熔体强度对泡孔结构的影响。结果表明,与普通商业化聚丙烯如T30S相比,较高的熔体强度有利于泡孔结构的控制。 |
| 英文摘要: |
| The high melt strength polypropylene (HMSPP) is produced by direct polymerization. This polypropylene contains a wide molecular weight distribution and exhibit excellent mechanical properties, especially with very high melt strength. The expanded polypropylene beads are produced by above HMSPP through autoclave-based batch process. The effects of processing conditions and melt strength on the cellular morphology of EPP were investigated by scanning electron microscope (SEM) and melt strength meter, respectively. Results indicated higher melt strength facilitates the control of foaming process and cellular structure compared with common commercial polypropylene such as T30S. |
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