Origin of Carbon Nanotubes Induced Poly(L-Lactide) Crystallization: Surface Induced Conformational Order

被引：116

作者：

Hu, Xiao ^{[1
,2
]}

An, Haining ^{[1
,2
]}

Li, Zhong-Ming ^{[1
,2
]}

Geng, Yong ^{[3
]}

Li, Liangbin ^{[4
,5
]}

Yang, Chuanlu ^{[3
]}

机构：

[1] Sichuan Univ, Coll Polymer Sci & Engn, Chengdu 610064, Peoples R China

[2] Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China

[3] Ludong Univ, Dept Phys & Electrons, Yantai, Peoples R China

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China

[5] Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Peoples R China

来源：

MACROMOLECULES | 2009年 / 42卷 / 08期

基金：

中国国家自然科学基金;

关键词：

INFRARED CORRELATION SPECTROSCOPY; X-RAY-SCATTERING; ISOTACTIC POLYPROPYLENE; MELT CRYSTALLIZATION; SHEAR; NANOCOMPOSITES; ACID); NUCLEATION; COMPOSITE; POLYMERS;

D O I：

10.1021/ma802758k

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The origin of carbon nanotube (CNT)-induced polymer crystallization was studied at an early stage with the help of in-situ Fourier transform infrared spectroscopy (FTIR). Poly(L-lactide) (PLLA), an increasingly popular biodegradable polymer was selected as the model polymer. Solution coagulation was utilized to prepare the PLLA/CNTs nanocomposites. 0.01g CNTs were added to 20 mL methylene dichloride (CH2Cl2), ultrasonically mixing for 40 min. 10 g of PLLA was dissolved in 100 mL of CH2Cl 2. A uniform CH2Cl2/PLLA/CNTs solution was obtained by dropping the predispersed solution into the CH2Cl 2/PLLA hybrid. Pure PLLA was also dissolved under exactly the same conditions for comparison. CNTs were shown to accelerate the crystallization of PLLA significantly, acting as an efficient nucleator. CNTs provide templates for the conformational ordering of PLLA by providing reactive surfaces where strong noncovalent binding with polymer main chains occurred.

引用

页码：3215 / 3218

页数：4

共 27 条

[1] Shear-induced conformational ordering in the melt of isotactic polypropylene [J].

An, Haining ;

Zhao, Baijin ;

Ma, Zhe ;

Shao, Chunguang ;

Wang, Xiao ;

Fang, Yapeng ;

Li, Liangbin ;

Li, Zhongming .

MACROMOLECULES, 2007, 40 (14) :4740-4743

[2] Carbon nanotubes induced crystallization of poly(ethylene terephthalate) [J].

Anand, K. Anoop ;

Agarwal, U. S. ;

Joseph, Rani .

POLYMER, 2006, 47 (11) :3976-3980

[3] Noncovalent and nonspecific molecular interactions of polymers with multiwalled carbon nanotubes [J].

Baskaran, D ;

Mays, JW ;

Bratcher, MS .

CHEMISTRY OF MATERIALS, 2005, 17 (13) :3389-3397

[4] Crystallization and orientation studies in polypropylene/single wall carbon nanotube composite [J].

Bhattacharyya, AR ;

Sreekumar, TV ;

Liu, T ;

Kumar, S ;

Ericson, LM ;

Hauge, RH ;

Smalley, RE .

POLYMER, 2003, 44 (08) :2373-2377

[5] Epitaxial crystallization and crystalline polymorphism of polylactides [J].

Cartier, L ;

Okihara, T ;

Ikada, Y ;

Tsuji, H ;

Puiggali, J ;

Lotz, B .

POLYMER, 2000, 41 (25) :8909-8919

[6]

Chalmers J.M., 2002, Handb. Vib. Spectrosc, V3, P1893

[7] MOLECULAR CONFORMATION OF POLY(S-LACTIC ACID) [J].

DESANTIS, P ;

KOVACS, AJ .

BIOPOLYMERS, 1968, 6 (03) :299-&

[8] BIODEGRADABLE MATERIALS OF POLY(L-LACTIC ACID) .1. MELT-SPUN AND SOLUTION-SPUN FIBERS [J].

ELING, B ;

GOGOLEWSKI, S ;

PENNINGS, AJ .

POLYMER, 1982, 23 (11) :1587-1593

[9] Dynamical transition and crystallization of polymers [J].

Fukao, K ;

Miyamoto, Y .

PHYSICAL REVIEW LETTERS, 1997, 79 (23) :4613-4616

[10] Influence of shear on the templated crystallization of poly(butylene terephthalate)/single wall carbon nanotube nanocomposites [J].

Garcia-Gutierrez, M. C. ;

Hernandez, J. J. ;

Nogales, A. ;

Pantine, P. ;

Rueda, D. R. ;

Ezquerra, T. A. .

MACROMOLECULES, 2008, 41 (03) :844-851

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