期刊文献+

NON-ISOTHERMAL CRYSTALLIZATION OF POLY(L-LACTIDE)(PLLA) UNDER QUIESCENT AND STEADY SHEAR CONDITIONS 被引量:3

NON-ISOTHERMAL CRYSTALLIZATION OF POLY(L-LACTIDE)(PLLA) UNDER QUIESCENT AND STEADY SHEAR CONDITIONS
下载PDF
导出
摘要 The non-isothermal crystallization of poly(L-lactide) (PLLA) under quiescent and steady shear flow conditions was in situ investigated by using polarizing optical microscopy (POM) with a hot shear stage and wide-angle X-ray diffraction (WAXD). The shear rate and the cooling rate both play a significant role in the final crystalline morphology and crystallinity. Under quiescent conditions, the morphology assumes different sized spherulites, and its crystallinity dramatically reduces with increasing the cooling rate. On the other hand, the shear flow increases the onset crystallization temperature, and enhances the final crystallinity. When the shear rate is above 5 s^-1, cylindrite-like crystals are observed, furthermore, their content depends on the cooling rate. The non-isothermal crystallization of poly(L-lactide) (PLLA) under quiescent and steady shear flow conditions was in situ investigated by using polarizing optical microscopy (POM) with a hot shear stage and wide-angle X-ray diffraction (WAXD). The shear rate and the cooling rate both play a significant role in the final crystalline morphology and crystallinity. Under quiescent conditions, the morphology assumes different sized spherulites, and its crystallinity dramatically reduces with increasing the cooling rate. On the other hand, the shear flow increases the onset crystallization temperature, and enhances the final crystallinity. When the shear rate is above 5 s^-1, cylindrite-like crystals are observed, furthermore, their content depends on the cooling rate.
作者 李忠明
出处 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2010年第3期357-366,共10页 高分子科学(英文版)
基金 supported by the National Natural Science Foundation of China(No.50527301)
关键词 Poly(L-lactide) (PLLA) Non-isothermal crystallization SHEAR Cylindrite-like crystal Poly(L-lactide) (PLLA) Non-isothermal crystallization Shear Cylindrite-like crystal
  • 相关文献

参考文献28

  • 1Liao,K.,R.,Quan,D.P.,Gao,J.W.,Luo,B.H.And Lu,Z.J.,Acta Polymerica Sinica(in Chinese),2002,(2):137.
  • 2He,Y.,Fan,Z.Y.,Hu,Y.F.,Wu,T.,Wei,J.and Li,S.M.,Eur.Polym.J.,2007,43:443.
  • 3Zhao,Y.Y.,Qiu,Z.B.and Yang,W.T.,J.Phys.Chem.B,2008,112:16461.
  • 4Hong,H.and Liang,G.Z.,Mater.Lett.,2007,61(6):1384.
  • 5Yang,J.L.,Zhao,T.,Cui,J.J.,Liu,L.J.,Zhou,Y.C.,Li,G.,Zhou,E.L.and Chen,X.S.,J.Polym.Sci.Part B:Polym.Phys.,2006,44:3215.
  • 6Liu,A.X.,Wei,J.C.,Chen,X.S.,Jing,X.B.,Cui,Y.and Liu,Y.,Chinese J.Polym.Sci.,2009,27(3):415.
  • 7Wang,L.,Cai,C.and Dong,CM.,Chinese J.Polym.Sci.,2008,26(2):161.
  • 8Iwata,T.and Doi,Y.,Macromolecules,1998,31:2461.
  • 9Tsuji,H.and Ikada,Y.,Polymer,1995,36:2709.
  • 10Tsuji,H.,Polymer,1996,37:595.

同被引文献14

引证文献3

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部