Crystallization of precisely halogen-substituted polyethylenes induced by ultra-high molecular weight polyethylene fiber
Crystallization of precisely halogen-substituted polyethylenes induced by ultra-high molecular weight polyethylene fiber
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超高分子量聚乙烯纤维诱导精密卤代聚乙烯结晶
DOI：
10.1016/j.polymer.2020.123198
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发表时间：
2020-11
期刊：
影响因子：
4.6
通讯作者：
Wang Zongbao
中科院分区：
文献类型：
--
作者：
Miao Weijun;Zhou Shiman;Wang Yong;Li Yiguo;Wang Zongbao
以ADMET聚合制备的精确卤素取代聚乙烯，即PE21F、PE21Cl和PE21Br3种取代聚合物为模型，研究了UHMWPE纤维诱导取代聚合物的外延结晶行为。用扫描电子显微镜、广角X射线衍射仪和差示扫描量热仪分别对晶体的形貌、结构和熔融行为进行了表征。结果表明，在UHMWPE纤维表面形成了分子链平行于纤维轴的带状晶体，其尺寸和规整性随取代基体积的增加而减小。含有少量取代基的PE21F可被诱导在UHMWPE纤维表面形成双组分晶体。但是，当取代基体积增加到氯和溴时，纤维表面形成的晶体有序度较低，不能诱导外围分子的结晶。纤维上形成的晶体的熔融温度远高于本体聚合物，这是由于UHMWPE纤维的晶体结构更有序，片层更厚所致。此外，还探讨了不同结构特征和化学组成的填料对取代聚合物结晶行为的影响机理。这项研究将对界面诱导结晶有一个更好的理解。
The precisely halogen-substituted polyethylenes prepared by ADMET polymerization, that is, PE21F, PE21Cl and PE21Br were chosen as substituted polymers model to study the epitaxial crystallization of substituted polymers induced by the UHMWPE fiber. The morphology, structure and melting behavior of the crystals were characterized by SEM, WAXD and DSC, respectively. The results showed that ribbon crystals with molecular chains parallel to the fiber axis formed on the UHMWPE fiber surface, and the size and regularity decreased with the increase of substituent volume. PE21F with a small substituent could be induced to form two-component crystals on the UHMWPE fiber surface. However, when the substituent volume increased to Cl and Br, the order of crystal formed on the fiber surface was relatively low, which could not induce the crystallization of peripheral molecules. The melting temperatures of the crystals formed on fiber were much higher than that of the bulk polymers, which was attributed to more ordered crystal structure and the thicker lamellae induced by the UHMWPE fiber. In addition, we also discussed the influence mechanism of different structural characteristics and chemical composition of fillers on the crystallization behavior of substituted polymers. This study will establish a better understanding of interface-induced crystallization.
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影响因子：
4.6
作者：
Weijun Miao;You Lv;Wenge Zheng;Zongbao Wang;Zhong-Ren Chen
通讯作者：
Weijun Miao;You Lv;Wenge Zheng;Zongbao Wang;Zhong-Ren Chen
高剪切温度下短链支化对双峰聚乙烯剪切诱导晶体形成的影响
影响因子：
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作者：
Jiang Libin;An Minfang;Wu Feng;Miao Weijun;Wang Zongbao;Zhang Yaopeng;Hsiao Benjamin S.
通讯作者：
Hsiao Benjamin S.
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影响因子：
9.1
作者：
Zhiqiang Jiang;Peng Chen;Zongbao Wang;Qun Gu
通讯作者：
Qun Gu
影响因子：
5.5
作者：
Flieger, Ann-Kristin;Schulz, Martha;Thurn-Albrecht, Thomas
通讯作者：
Thurn-Albrecht, Thomas
影响因子：
7.015
作者：
Gaines, Taylor W.;Nakano, Tatsuya;Wagener, Kenneth B.
通讯作者：
Wagener, Kenneth B.