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首页> 外文期刊>Chinese science bulletin >Investigation on chain structure of LLDPE obtained by ethylene in-situ copolymerization with DSC and XRD
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Investigation on chain structure of LLDPE obtained by ethylene in-situ copolymerization with DSC and XRD

机译：乙烯与DSC和XRD原位共聚得到的LLDPE的链结构研究

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摘要

Thermal segregations of LLDPE were treated with successive self-nucleation/annealing (SSA) on differential scanning calorimetry (DSC). Information on molecular heterogeneity of LLDPE was obtained. After SSA was treated, the multiple endothermic peaks were observed in the DSC thermograms during heating experiment. It is obtained that the thickness of different lamellas formed by segments of various lengths was 4-10 nm. X-ray diffraction (XRD) results showed that the crystallites dimensions of various reflections were about several dozens of nanometers. The ethylene/α-olefin copolymers and the copolymer via in-situ copolymerization were similar to each other for molecular heterogeneity and XRD characteristics, which revealed that it was possible to use the ethylene/α-olefin copolymers to simulate the copolymer via in-situ copolymerization of ethylene to simplify the complexity of the structure of the ethylene in-situ copolymer.
机译：在差示扫描量热法（DSC）上，通过连续的自成核/退火（SSA）处理LLDPE的热分离。获得有关LLDPE分子异质性的信息。在对SSA进行处理后，在加热实验过程中，在DSC热分析图中观察到了多个吸热峰。由不同长度的段形成的不同薄片的厚度为4-10nm。 X射线衍射（XRD）结果表明，各种反射的微晶尺寸约为几十纳米。乙烯/α-烯烃共聚物和通过原位共聚的共聚物在分子异质性和XRD特性方面彼此相似，这表明可以使用乙烯/α-烯烃共聚物通过原位模拟共聚物乙烯共聚以简化乙烯原位共聚物结构的复杂性。

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