Preparation and characterization of long chain branched polypropylene mediated by different heteroaromatic ring derivatives
Preparation and characterization of long chain branched polypropylene mediated by different heteroaromatic ring derivatives
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不同杂芳环衍生物介导的长链支化聚丙烯的制备及表征
DOI：
10.1016/j.polymer.2012.12.014
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发表时间：
2013-01
期刊：
影响因子：
4.6
通讯作者：
Tang, Tao
中科院分区：
文献类型：
--
作者：
Wan, Dong;Ma, Li;Xing, Haiping;Wang, Lu;Zhang, Zhenjiang;Qiu, Jian;Zhang, Guangchun;Tang, Tao
用三种不同的芳杂环衍生物（活性助剂）调节聚丙烯（PP）的熔融自由基反应。高温1H NMR和高温尺寸排阻色谱（HT-SEC）结果表明，所有助剂均能迅速将PP大自由基转变为共振稳定的大自由基，并有效抑制PP大自由基的β-断裂。长链支化结构，没有显着的双峰分布的分子量，可以引入到混凝剂官能化的PP样品。研究了芳杂环和吸电子基团的化学结构对改性聚丙烯分子结构和熔体性能的影响。根据1H NMR、转矩曲线、流变学测试和HT-SEC结合激光光散射检测的结果，提出了不同活性助剂与烷氧基的理论摩尔比下活性助剂官能化PP样品可能发生的反应。
Three different heteroaromatic ring derivatives (coagents) were used to adjust the melt radical reaction of polypropylene (PP). From the results of high temperature1H NMR and high-temperature size-exclusion chromatography (HT-SEC), all the coagents could quickly convert the tertiary PP macroradicals into resonance stabilized macroradicals and effectively restrain the β-scission of PP macroradicals. Long chain branched structures, without significant bimodal distribution of molecular weight, could be introduced into coagents-functionalized PP samples. Effect of chemical structures of heteroaromatic rings and electron-attracting groups on the molecular structures and melt properties of modified PP samples was studied. The possible reactions of coagents-functionalized PP samples in different theoretical molar ratio of coagent to alkoxy radical were also proposed according to the results of1H NMR, torque curves, rheological measurements and HT-SEC coupled with laser light scattering detector.
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影响因子：
3
作者：
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通讯作者：
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影响因子：
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影响因子：
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作者：
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