随着温度的升高聚乙烯产物支化度和甲基支链含量都迅速增加，长支链含量则显著下降。
Branching degree of the polyethylenes and the content of methyl branch rise quickly with reaction temperature, but the content of long branches drops remarkably.
较低摩尔质量且支化度小的窄摩尔质量分布级分具有较完善、分布更加均匀的薄片晶结构。
The fraction with smaller molecular weight, molecular weight distribution and lower content of short chain branching could form thinner and more uniform laminar crystals.
差示扫描量热分析结果表明，当相对分子质量相差不大时，支化度较高的聚乙烯具有较低的熔点。
DSC analysis showed that polyethylene with higher branching degree had lower melting point when relative molecular masses of the polymers were approximate.
相较类似的线性聚合物而言，超支化聚合物在拓扑结构上与树枝状大分子更为相似，只是其支化度相对来说要低一些。
As compared to their linear analogous, hyperbranched polymers have drawn much attention due to their similar topology structures and properties comparing with dendrimers.
发现初生聚乙烯粉末具有条状形态结构，其支化度、结晶度及晶粒尺寸均与低压聚乙烯相似，但其熔点和特性粘数较高。
The morphology of nascent polymer powder shows strip structure by scanning electron microscope. Branched content, crystallinity and crystallite size are similar to those of high density polyethylene.
用稀土催化剂得到的顺-1，4-聚丁二烯具有顺式含量高，支化度小及分子链结构规整性好等特点。 在常温下为非晶态，但在低温下易于结晶，因而具有较高的力学性能。
Cis 1,4-polybutadiene synthesized by rare-earth catalyst has high cis content, high degree of molecular reqularity and low degree of branching.
酸解淀粉经均相脱支和结晶化可以形成较好的微晶，且酸解时间越长结晶度越高。
The better crystallite can be obtained by homogeneously debranching and crystallizing the acid-hydrolyzed starch. Besides the crystallinity increases as the hydrolysis time lasts.
酸解淀粉经均相脱支和结晶化可以形成较好的微晶，且酸解时间越长结晶度越高。
The better crystallite can be obtained by homogeneously debranching and crystallizing the acid-hydrolyzed starch. Besides the crystallinity increases as the hydrolysis time lasts.
应用推荐