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成核剂DMDBS改性聚丙烯的等温结晶研究 被引量：1

Isothermal Crystallization of Isotactic Polypropylene Nucleated with 1,3: 2,4-bis(3,4-dimethylbenzylidene) sorbitol
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摘要 采用差示扫描量热法(DSC)对成核剂二-(3,4-二甲基苄叉)山梨醇(DMDBS)改性聚丙烯的等温结晶动力学进行了研究。结果表明DMDBS的加入可大幅度缩短聚丙烯的半结晶时间t1/2,加快聚丙烯的结晶速度。在等温条件下DMDBS的加入对聚丙烯的结晶方式影响不大,但可显著降低聚丙烯球晶生长的单位面积折叠表面自由能σe,从而明显加快成核速率。 The isothermal crystallization kinetics of isotactic polypropylene （iPP） nucleated with bis（3,4 -dimethyl- benzylidene） sorbitol （DMDBS） were investigated by differential scanning calorimetry （DSC）. The results showed that addition of DMDBS shortened half crystallization time（ tl/2 ） and increased crystallization rate of iPP greatly. In addition, incorporation of nucleating agent DMDBS in iPP didn＇t change the crystallization growth patterns of iPP under isothermal conditions, but decreased the value of interfacial free energy per unit area perpendicular to iPP chains （σe） , so that the nucleation rate of iPP was increased and the nucleation rate was increased greatly.
作者 卢翠红 潘彤 张跃飞 李江胜
机构地区 长沙理工大学化学与生物工程学院
出处 《广州化工》 CAS 2013年第13期80-82,126,共4页 GuangZhou Chemical Industry
基金 湖南省科技厅资助项目:锂离子电池用全固态聚合物电解质的研究(2009GK3015) 湖南省科技厅资助项目:两亲接枝共聚物的绿色合成及其自组装纳米胶束研究(2010FJ 6031)
关键词 等温结晶动力学 二-(3 4-二甲基苄叉)山梨醇(DMDBS) 成核剂 聚丙烯 isothermal crystallization kinetics bis （ 3,4 - dimethylbenzylidene ） sorbitol （DMDBS） nucleatingagent polypropylene
分类号 TQ322.2 [化学工程—合成树脂塑料工业]
  • 相关文献

参考文献10

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共引文献27

同被引文献32

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广州化工
2013年 第13期

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