A Novel Composite Coupled Hardness with Flexibleness-Polylactic Acid Toughen with Thermoplastic Polyurethane

被引：70

作者：

Hong, Hua ^{[1
,2
]}

Wei, Jie ^{[1
,2
]}

Yuan, Yuan ^{[1
,2
,3
]}

Chen, Fang-Ping ^{[1
,2
]}

Wang, Jing ^{[1
,2
,3
]}

Qu, Xue ^{[1
,2
]}

Liu, Chang-Sheng ^{[1
,2
,3
]}

机构：

[1] E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

[2] E China Univ Sci & Technol, Engn Res Ctr Biomed Mat, Minist Educ, Shanghai 200237, Peoples R China

[3] E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2011年 / 121卷 / 02期

关键词：

polylactic acid; thermoplastic polyurethane; brittle; mechanical properties; rheology;

D O I：

10.1002/app.33675

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

With the aim to modify the brittleness of polylactic acid (PLA), it was firstly melt blended with thermoplastic polyurethane (TPU) at six different PLA wt % of 100, 90, 80, 70, 60, and 50 compositions. The properties of PLA/TPU composite were characterized by means of electron microscopy, rheological, mechanical and thermal methods. The results showed that the brittle fracture of pure PLA was gradually transformed into ductile fracture with the addition of the TPU elastomer. The notched impact strength of the composite at 10 wt % TPU was over three times higher than that of pure PLA. The composite was found to be a partially miscible system with shifted glass transition temperatures. The molten blend was shear-thinning fluid and it could be processed by conventional thermoplastic processes such as extrusion and injection molding. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 855-861, 2011

引用

页码：855 / 861

页数：7

共 15 条

[1]

AMGAD MH, 2010, OPERATIVE TECH ORTHO, V20, P76

[2] Structure, dispersibility, and crystallinity of poly(hydroxybutyrate)/poly(L-lactic acid) blends studied by FT-IR microspectroscopy and differential scanning calorimetry [J].