long chain branch

The introduction of long chain branch can significantly modify its rheological properties while PET reacts with multifunctional chain-extenders .

与多官能团扩链剂发生扩链反应时，引入支化结构可以显著地改善PET的流变性质。

The molecular long chain branch structure of metallocene polyethylene has great effects on it 's rheological behavior , long chain branch can significantly enhance melt elasticity and shear thinning .

茂金属聚乙烯的分子链长支化结构对其流变特性有重要影响，长支链可以使熔体弹性和剪切变稀效应明显增强。

The foundation of metallocene polyethylene molecular chain model has been introduced in this paper , the developments in molecular chain structure model of metallocene polyethylene in recent years are reviewed , relevant long chain branch structure models and their relationships with rheological properties are expatiated too .

本文介绍了茂金属聚乙烯分子链模型建立的理论依据，从流变学角度综述了近年来茂金属聚乙烯分子链结构模型的研究进展，阐述了有关的长链支化结构模型及其与流变性能的关系。

~ ( 13 ) C NMR indicated that branched chain polyethylene with long chain branch es ( carbon number more than 6 ) was only synthesized on Cat ⅰ, while polyethylene with methyl pendants and long chain branch was prepared over Cat ⅱ .

13C核磁共振谱分析结果表明，催化剂体系Ⅰ制备的聚乙烯产物的支链全部为长支链（支链碳原子数大于等于6），而催化剂体系Ⅱ制备的聚乙烯则含有长支链和侧甲基；

The Relationship between Long · Chain Branch and Gel of Polybutadiene

合成橡胶的凝胶与长链支化的关系