机构

• 化学研究所 [1]
• 长春应用化学研究所 [1]

采集方式

• OAI收割 [2]

内容类型

• 期刊论文 [2]

发表日期

• 2014 [2]

学科主题

筛选

浏览/检索结果: 共2条，第1-2条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Molecular Weight Dependency of Crystallization and Melting Behavior of beta-Nucleated Isotactic Polypropylene 期刊论文  OAI收割 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2014, 卷号: 52, 期号: 19, 页码: 1301-1308 作者:  Lu, Ying;  Wang, Qiao;  Men, Yongfeng   |  收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09 Isotactic Polypropylene  Isothermal Crystallization  Molecular Weight  Waxd  Beta Phase   Molecular Weight Dependency of Crystallization and Melting Behavior of beta-Nucleated Isotactic Polypropylene 期刊论文  OAI收割 journal of polymer science part b-polymer physics, 2014, 卷号: 52, 期号: 19, 页码: 1301-1308 Lu, Ying; Wang, Qiao; Men, Yongfeng 收藏  |  浏览/下载：29/0  |  提交时间：2015/10/19 Compounds of isotactic polypropylene (iPP) and beta-nucleating agent were used to investigate the relationship between the development of beta phase and molecular weight in iPP under quiescent crystallization conditions by using wide angle X-ray diffraction and differential scanning calorimetry techniques. In all cases  the dependency of the formation of beta phase in iPP on molecular weight of iPP at a defined crystallization temperature range was found. The iPP with high molecular weight possessed a wide range of crystallization temperature in inducing rich beta phase. However  poor or even no beta phase was obtained for the samples with low molecular weight in the same range. In addition  an upper critical crystallization temperature of producing dominant beta phase was found at 125 degrees C. Beyond this temperature  a phenomenon of prevailing alpha phase became obvious. (C) 2014 Wiley Periodicals  Inc.