采用差示扫描量热法(DSC)对取代芳基杂环磷酸盐类成核剂改性聚丙烯的等温结晶过程及结晶动力学进行了研究.结果表明取代芳基杂环磷酸的一价金属盐成核剂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,而二价和三价的金属盐对聚丙烯结晶速度的改善不明显.对于iPP及成核iPP,其Avrami指数基本都在3左右,表明在等温条件下成核剂的加入对聚丙烯的结晶方式影响不大.同时采用Hoffman理论计算了聚丙烯和成核聚丙烯球晶生长的单位面积折叠表面自由能σe,结果表明取代芳基杂环磷酸一价金属盐的加入可显著降低聚丙烯的σe,而二价和三价的金属盐对σe的影响不明显.
参考文献
| [1] | Gui QD.;Xin Z.;Zhu WP.;Dai G. .Effects of an organic phosphorus nucleating agent on crystallization behaviors and mechanical properties of poly(propylene)[J].Journal of Applied Polymer Science,2003(2):297-301. |
| [2] | Zhang GP.;Yu JY.;Xin Z.;Gui QD.;Wang SY. .Crystallization kinetics of nucleated polypropylene with organic phosphates[J].Journal of Macromolecular Science. Physics,2003(3/4):663-675. |
| [3] | 张跃飞,辛忠.取代芳基杂环磷酸金属盐类成核剂在等规聚丙烯中的成核效应[J].化工学报,2006(04):953-958. |
| [4] | Manchado MAL.;Torre L.;Kenny JM.;Biagiotti J. .Effects of reinforcing fibers on the crystallization of polypropylene[J].Polymer engineering and science,2000(10):2194-2204. |
| [5] | Yu J.;He J. .Crystallization kinetics of maleic anhydride grafted polypropylene ionomers[J].Polymer: The International Journal for the Science and Technology of Polymers,2000(3):891-898. |
| [6] | Srinivas S;Babu JR;Riffle JS;Wilkes GL;VIRGINIA POLYTECH INST & STATE UNIV DEPT CHEM BLACKSBURG VA 24061.;VIRGINIA POLYTECH INST & STATE UNIV POLYMER MAT & INTERFACES LAB BLACKSBURG VA 24061. .Kinetics of isothermal and nonisothermal crystallization of novel poly(arylene ether ether sulfide)s[J].Polymer engineering and science,1997(3):497-510. |
| [7] | Hoffman J D .Regime Ⅲ crystallization in melt-crystallized polymers:the variable cluster model of chain folding[J].Polymer,1983,24:3-26. |
| [8] | G Zhu;C C Li;Z Y Li .The effects of alkali dehydroabietate on the crystallization process of polypropylene[J].European Polymer Journal,2001,37:1007-1013. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%