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科研机构
化学研究所 [1]
长春应用化学研究所 [1]
内容类型
期刊论文 [2]
发表日期
2014 [2]
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Molecular Weight Dependency of Crystallization and Melting Behavior of beta-Nucleated Isotactic Polypropylene
期刊论文
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
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浏览/下载:12/0
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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
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
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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.
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