[1]俞　强,刘建忠,林明德,等.间规聚丙烯与等规聚丙烯共混物的结晶行为[J].常州大学学报(自然科学版),2000,(01):25-28.
　YU Qiang,LIU Jian -zhong,LIN Ming -de,et al.Crystallization Behavior of Blends of Syndiotacti c and Isotactic Polypropylene[J].Journal of Changzhou University(Natural Science Edition),2000,(01):25-28.
点击复制

间规聚丙烯与等规聚丙烯共混物的结晶行为()
分享到：

常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2000年01期
页码:
25-28
栏目:
出版日期:
2000-03-25

文章信息/Info

Title:
Crystallization Behavior of Blends of Syndiotacti c and Isotactic Polypropylene
作者:
俞　强1 ;  刘建忠1 ;  林明德1 ;  王　勇2 ;  刘　芬2
1.江苏石油化工学院化学工程系, 江苏 常州 213016
Author(s):
YU Qiang1 ;  LIU Jian -zhong1 ;  LIN Ming -de1 ;  WANG Yong ;  LIU Fen
1 .Department of Chemical Engineering , Jiangsu Inst itute of Pet rochemical Technology , Changzhou 213016 , China
关键词:
间规聚丙烯(sPP); 等规聚丙烯(iPP); 共混; 结晶行为; 示差量热扫描仪
Keywords:
syndio tactic poly propy lene ; isotactic poly propylene ; blends ; crystallization behavior ; DSC
分类号:
O 63
文献标志码:
A
摘要:
使用DSC 和偏光显微镜对间规聚丙烯(sPP) 和等规聚丙烯(iPP) 共混物的形态和结晶行为和结晶动力学进行了研究。 发现sPP 与iPP 共混后形成了不相容的多相共混体系, 两共混组分在各自微区形成结晶。在sPP 中混入少量iPP 一方面改变了 sPP 结晶的成核机理和生长方式, 另一方面对sPP 的结晶起到明显的促进作用, 使sPP 的结晶速率常数增大、半结晶时间减少、 结晶活化能下降。同时共混还可以提高sPP 的结晶度和结晶熔点。
Abstract:
The crystallization morphology and behaviors of blends of metallocene catalyzed syndiotactic polypropy lene (sPP)and conventional isotactic polypropylene (iPP)were studied by differential scanning calorimet ry and polarizing microscope methods .It was observed that sPP and iPP in the blends each formed its own crystallization structure , which gives the evidence of incompat ibility of the two components in the blends. The remarkable increase of Avrami index of sPP , af ter blending wi th iPP , suggests that the nucleatio n and g row th mechanism in the crystallization process of sPP in the blends have changed .Acting as nuclear agent , the existence of small proportions of iPP in the blends dramatically hastened crystallization of sPP , in both isothermal and nonisothermal processes.The rate constant (K)of cry stallization of sPP increased and the half time of crystallization (t 1/ 2), the crystallization activation energy (ΔE)decreased w ith the increase of iPP amount s. The hig her degree of crystallinity of sPP in the blends w as also observed .

参考文献/References:

〔1〕关肇基, 姜斌.间规聚丙烯的研究开发进展〔J〕.合成树脂 及塑料, 1997 , 14 (1):58 -60 .
〔2〕Janimak J , Cheng S , Zhang A , et al.Isotacti city eff ect on crystallization and melting in PP f raction 〔J〕.Polymer, 1992 , 33 (4):728 .
〔3〕Thomann R, Kressler J , Rudolf B , et al.Morphology and phase behaviou r of blends of s -PP and i-PP 〔J〕.Polymer , 1996 , 37 (13):2 635 -2 639 .
〔4〕Loos J , Buhk M , Pet ermann J .Morphologi cal studies on s -PP prepared by ansamet allocenes 〔J〕.Polymer , 1996, 37 (3): 387 .
〔5〕内川进隆.S -PP 的特性和应用开发(日) 〔J〕.Polymer Digest (日), 1998 , 50 (4):33 -53 .
〔6〕Cebe P, Hong S D.Crystallization behavi ors of poly (ether - ether -ket ene)〔J〕.Polymer , 1986 , 27 (8):1 183 .

相似文献/References:

[1]俞　强,龚方红,刘建忠,等.间规立构聚丙烯非等温结晶行为研究[J].常州大学学报(自然科学版),2001,(01):10.
　YU Qiang,GONG Fang -hong,LIU Jian -zhong,et al.Nonisothermal Crystallization Behavior of Syndiotactic Polypropylene[J].Journal of Changzhou University(Natural Science Edition),2001,(01):10.

备注/Memo

备注/Memo:
基金项目:江苏石油化工学院科技基金资助(9815) 作者简介:俞强(1956 -), 男, 江苏南京人, 江苏石油化工学院副教授;2 .本院化工系99 届毕业生。
更新日期/Last Update: 2000-03-25