支化是指在一定的条件下形成枝状非线性结构高分子的过程。 支化度是指单位体积中支化点的数目或支化点间的平均相对分子量。 支化度=(Σ 支化单元+ Σ 未端单元)/ Σ 重复单元
...玻璃化转变温度 但 树枝状聚合物和超支化聚合物之间也有显著的差别 超支化聚合物的最显著特 征是它的支化度(degree of branching )DB或者说是支化因素 branching factor 它决定了聚合物结构中支化单元 末端单元 线性单元之间的比例 据定义 树枝状聚合物的DB 为...
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... branching channel 辫状河; 分汊河道; 夹江 branching coefficent 支化度 branching coefficient 支化系数 ...
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... de GREe of association 连带度 de GREe of branching 支化度 de GREe of crosslinking 交联度 ...
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... branching decision 转移判定 branching degree 支化度 branching density 支化密度 ...
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The dynamic viscoelastic properties of the PE co-catalyzed by different phosphine scavengers display that the co-catalysts can augment the branching degree and reduce the relative molecular mass of the resultant PE so as to improve its elevated temperature processability.
动态流变研究表明,助催化剂可增加PE的支化度和降低其相对分子质量,以提高其高温加工性能。
参考来源 - 水杨醛亚胺镍配合物在甲苯中催化乙烯聚合Crystallinity and degree of branching of PE also had great effect on the photografting.
PE的结晶度、支化度对接枝性能也有较大影响。
参考来源 - 聚乙烯表面紫外光接枝改性研究The group component, including alkyl benzene, indane, alkyl naphthalene, acenaphthene, fluoene, and anethracene (or phenanthrene), of SPS is speculated from MS. Branchiness index of substituted aryl of SPS and aromaticity of SPS were gained from NMR.
以减三线馏分油合成的石油磺酸钠中，茚满类含量最高，烷基苯类、苯并二环己烷类和烷基萘类次之，苊类、芴类和蒽(或菲)类含量最低。 从核磁共振谱图上得到了取代基烷基碳链的支化度、芳香度等结构参数。
参考来源 - 三次采油用石油磺酸钠的合成与分析·2,447,543篇论文数据，部分数据来源于NoteExpress
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.
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