Tailoring Mechanical Properties of Isotactic Polypropylene Via Crystallization of the Mesophase and Control of Stereodefects Concentration

被引：19

作者：

De Rosa, Claudio ^{[1
]}

Auriemma, Finizia ^{[1
]}

de Ballesteros, Odda Ruiz ^{[1
]}

Di Girolamo, Rocco ^{[1
]}

Tarallo, Oreste ^{[1
]}

Galotto, Nella Galotto ^{[1
]}

机构：

[1] Univ Naples Federico II, Dipartimento Sci Chim, I-80126 Naples, Italy

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2013年 / 214卷 / 17期

关键词：

isotactic polypropylene; mechanical properties; mesophases; stereodefective polypropylene; C-1-SYMMETRIC HETEROCYCLIC ZIRCONOCENES; ATOMIC-FORCE MICROSCOPY; PROPYLENE POLYMERIZATION; PLASTIC-DEFORMATION; ANSA-ZIRCONOCENES; GAMMA-PHASE; X-RAY; MORPHOLOGY; CATALYSTS; PERFORMANCE;

D O I：

10.1002/macp.201300296

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A strategy to tailor the properties of isotactic polypropylene, based on the combination of the crystallization of the mesophase and the control of the molecular structure and concentration of stereodefects via polymerization with metallocene catalysts, is presented. The mechanical properties can be modulated through the conventional slow crystallization from the melt in the and forms, depending on the concentration of stereodefects, or the crystallization of the mesophase by melt quenching. The most stereoirregular sample with rr concentration of 11% shows elastic behavior either when it is slowly crystallized in the form or when it is crystallized in the mesomorphic form, but with remarkable differences in the values of the modulus and tensile strength.

引用

页码：1951 / 1964

页数：14

共 56 条

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