[1]刘忠柱,秦琦,李睢水,等.有序熔体结构的β-iPP薄膜结晶行为研究[J].郑州大学学报(工学版),2019,40(03):12.
 The Crystallization Behavior of β-iPP Film With Different Ordered Melt Structures[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):12.
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有序熔体结构的β-iPP薄膜结晶行为研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
40
期数:
2019年03期
页码:
12
栏目:
出版日期:
2019-04-30

文章信息/Info

Title:
The Crystallization Behavior of β-iPP Film With Different Ordered Melt Structures
作者:
刘忠柱秦琦李睢水郑国强米立伟
文献标志码:
A
摘要:
通过熔体挤出-拉伸法制备了稀土类β成核剂改性等规聚丙烯(iPP)薄膜。然后把上述薄膜加热到不同熔融温度,通过DSC和POM实验分别考察了有序熔体结构对β-iPP薄膜非等温和等温结晶行为的影响。结果表明:在非等温结晶过程中,随着结晶温度的降低,部分熔融的β-iPP能够诱导形成更多成核位点,使其在较高的温度下发生结晶;同时,试样中诱导形成密集的柱晶结构。在等温结晶过程中,当Tf 169 °C时,在试样内部会发生β晶向α晶转变;然而当Tf 169 °C时,在试样内部的α晶逐渐向β晶转变。
Abstract:
The rare earth β-nucleating agent modified isotactic polypropylene (iPP) films were prepared by melt extrusion-stretching method. Subsequently, the films were heated to different fusion temperatures. The influence of ordered melt structures on non-isothermal and isothermal crystallization behavior of β-iPP films were investigated by DSC and POM experiments. The results indicated that, during the non-isothermal crystallization process, the partially melted β-iPP can induce the formation of more nucleation sites with decreasing crystallization temperature, and then inducing the crystallization at higher temperature; Meanwhile, the dense cylindrite is formed in samples. During the isothermal crystallization process, when the Tf is below 169 °C, the β crystal is transformed into α crystal in the sample; however, when the Tf is above 169 °C, the α crystal in the sample gradually changes into the β crystal.
更新日期/Last Update: 2019-04-16