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高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (2): 303-307.doi: 10.1007/s40242-015-4394-x

• Articles • 上一篇    下一篇

Effect of Polyhedral Oligomeric Silsesquioxane and Sorbitol on Properties of Isotactic Polypropylene

CHEN Guanyun1, FENG Baixuan1, ZHU Kongying1,2, ZHAO Yunhui1, YUAN Xiaoyan1   

  1. 1. School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China;
    2. Analysis and Measurement Center, Tianjin University, Tianjin 300072, P. R. China
  • 收稿日期:2014-10-20 修回日期:2015-01-11 出版日期:2015-04-01 发布日期:2015-02-02
  • 通讯作者: ZHU Kongying, YUAN Xiaoyan E-mail:ausky@tju.edu.cn;yuanxy@tju.edu.cn

Effect of Polyhedral Oligomeric Silsesquioxane and Sorbitol on Properties of Isotactic Polypropylene

CHEN Guanyun1, FENG Baixuan1, ZHU Kongying1,2, ZHAO Yunhui1, YUAN Xiaoyan1   

  1. 1. School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China;
    2. Analysis and Measurement Center, Tianjin University, Tianjin 300072, P. R. China
  • Received:2014-10-20 Revised:2015-01-11 Online:2015-04-01 Published:2015-02-02
  • Contact: ZHU Kongying, YUAN Xiaoyan E-mail:ausky@tju.edu.cn;yuanxy@tju.edu.cn

被引次数

1

摘要：

Isotactic polypropylene(iPP) was modified by the introduction of polyhedral oligomeric silsesquio- xanes(POSS) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol(DMDBS). Chemical combination of (3-mercapto)- propyl-heptaisobutyl POSS with DMDBS(POSS-DMDBS), and physical mixing of DMDBS with octaisobutyl POSS (iso-POSS/DMDBS) or trisilanolisobutyl POSS(tri-POSS/DMDBS) were applied respectively to modifying iPP, and the effects of POSS and DMDBS on crystallization, rheological and mechanical properties of iPP were systematically investigated. The results indicate that iso-POSS/DMDBS and tri-POSS/DMDBS were more effective than POSS-DMDBS on the improvement of the crystallization behavior of iPP due to the higher crystallization temperature, while the crystallinity of iPP containing POSS-DMDBS was enhanced, approximately approached to that of iPP containing tri-POSS/DMDBS. The tensile strength of iPP with POSS-DMDBS was significantly increased from 34 MPa to 40 MPa, as high as that of iPP with iso-POSS/DMDBS. The different effects caused by the specific interaction between POSS and DMDBS could possibly be applied in the modification of iPP.

关键词: Isotactic polypropylene, Polyhedral oligomeric silsesquioxane, Sorbitol

Abstract:

Isotactic polypropylene(iPP) was modified by the introduction of polyhedral oligomeric silsesquio- xanes(POSS) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol(DMDBS). Chemical combination of (3-mercapto)- propyl-heptaisobutyl POSS with DMDBS(POSS-DMDBS), and physical mixing of DMDBS with octaisobutyl POSS (iso-POSS/DMDBS) or trisilanolisobutyl POSS(tri-POSS/DMDBS) were applied respectively to modifying iPP, and the effects of POSS and DMDBS on crystallization, rheological and mechanical properties of iPP were systematically investigated. The results indicate that iso-POSS/DMDBS and tri-POSS/DMDBS were more effective than POSS-DMDBS on the improvement of the crystallization behavior of iPP due to the higher crystallization temperature, while the crystallinity of iPP containing POSS-DMDBS was enhanced, approximately approached to that of iPP containing tri-POSS/DMDBS. The tensile strength of iPP with POSS-DMDBS was significantly increased from 34 MPa to 40 MPa, as high as that of iPP with iso-POSS/DMDBS. The different effects caused by the specific interaction between POSS and DMDBS could possibly be applied in the modification of iPP.

Key words: Isotactic polypropylene, Polyhedral oligomeric silsesquioxane, Sorbitol