Poly(L-lactide)/Poly(D-lactide)/Multiwalled Carbon Nanotubes Nanocomposites: Enhanced Dispersion, Crystallization, Mechanical Properties, and Hydrolytic Degradation

被引：22

作者：

Dong, Qinglin ^{[1
]}

Li, Yi ^{[2
,3
]}

Han, Changyu ^{[2
]}

Zhang, Xin ^{[1
]}

Xu, Kun ^{[2
]}

Zhang, Huiliang ^{[2
]}

Dong, Lisong ^{[2
]}

机构：

[1] Changchun Univ Technol, Synthet Resin & Special Fiber Res Ctr, Changchun 130012, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Polymer Ecomat, Changchun 130022, Peoples R China

[3] Jilin Jianzhu Univ, Coll Mat Sci & Engn, Changchun 130118, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2013年 / 130卷 / 06期

基金：

美国国家科学基金会;

关键词：

biodegradability; crystallization; mechanical properties; POLYLACTIDE STEREOCOMPLEX; BEHAVIOR; ACID);

D O I：

10.1002/app.39667

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Biodegradable stereocomplex-type poly(l-lactide) (PLLA)/poly(d-lactide) (PDLA)/multiwalled carbon nanotubes (MWCNTs) nanocomposites are prepared via simple melt blending method at PDLA loadings from 5 to 20 wt %. Formation of the stereocomplex crystals in the nanocomposites is confirmed by the phase transition in the differential scanning calorimetric profiles. Field emission scanning electron microscopy observation indicates that MWCNTs are nicely dispersed in the PLLA/PDLA/MWCNTs ternary blends with 20 wt % PDLA loading due to the increased shear stress in the melt-compounding with presence of PDLA. The overall crystallization rates are faster in the PLLA/PDLA/MWCNTs nanocomposites than in PLLA/MWCNTs nanocomposite; however, the crystallization mechanism and crystal structure of these nanocomposites remain unchanged despite the presence of PDLA. The storage modulus above glass transition temperature has been apparently improved in the PLLA/PDLA/MWCNTs nanocomposites with respect to PLLA/MWCNTs nanocomposite. It is interesting to find that the hydrolytic degradation rates have been enhanced obviously in the PLLA/PDLA/MWCNTs nanocomposites than in PLLA/MWCNTs nanocomposite, which may be of great use and importance for the wider practical application of PLLA/MWCNTs nanocomposites. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3919-3929, 2013

引用

页码：3919 / 3929

页数：11

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