Toughness decrease of PLA-PHBHHx blend films upon surface-confined photopolymerization

被引：94

作者：

Rasal, Rahul M. ^{[1
,2
]}

Hirt, Douglas E. ^{[1
,2
]}

机构：

[1] Clemson Univ, Dept Chem & Biomol Engn, Clemson, SC 29634 USA

[2] Clemson Univ, Ctr Adv Engn Fibers & Films, Clemson, SC 29634 USA

来源：

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A | 2009年 / 88A卷 / 04期

基金：

美国国家科学基金会;

关键词：

PLA; PHBHHx; physical aging; surface modification; toughness; POLY(LACTIC ACID); IN-VITRO; BIODEGRADABLE POLYLACTIDE; MECHANICAL-PROPERTIES; PHOTOGRAFTING PROCESS; POLYHYDROXYALKANOATES; COPOLYMERS; MORPHOLOGY; MISCIBILITY; POLY(L-LACTIDE);

D O I：

10.1002/jbm.a.32009

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The present research investigates the effect of photoinduced grafting reaction on the bulk properties of melt processed poly(L-lactic acid) (PLA)-poly[(3-hydroxybutyrate)-co-(3-hydroxyhexanoate)] (PHBHHx) blend films. PLA-PHBHHx blend films, comprising 10 wt % PHBHHx showed a remarkable toughness improvement. From dynamic mechanical analysis of melt processed PLA-PHBHHx blend films, the blend appears to be noncompatible. Unfortunately, PLA-PHBHHx blend films underwent rapid physical aging as characterized using differential scanning calorimetry, resulting in a significant toughness loss. Physically aged films regained the original toughness on annealing at 60 C for 30 min. Annealed PLA-PHBHHx blend films also underwent physical aging leading to a significant toughness loss. Hydrophilic monomers like acrylic acid and acrylamide were successfully photopolymerized from the film surface using a sequential, two-step photo-grafting approach. The resultant films were characterized using water contact angle goniometry, ATR-FTIR spectroscopy, and mechanical testing. PLA-PHBHHx blend films lost their toughness significantly on surface modification and this was assigned to UV-assisted solvent induced crystallization as characterized using wide-angle X-ray diffraction analyses. (c) 2008 Wiley Periodicals, Inc. J Biomed Mater Res 88A: 1079-1086, 2009

引用

页码：1079 / 1086

页数：8

共 43 条

[1]

Cai H, 1996, J POLYM SCI POL PHYS, V34, P2701, DOI 10.1002/(SICI)1099-0488(19961130)34:16<2701::AID-POLB2>3.0.CO

[2]

2-S

[3] Thermal stability of polyhydroxyalkanoates [J].

Carrasco, F ;

Dionisi, D ;

Martinelli, A ;

Majone, M .

JOURNAL OF APPLIED POLYMER SCIENCE, 2006, 100 (03) :2111-2121

[4] Preparation and characterization of biodegradable PLA polymeric blends [J].

Chen, CC ;

Chueh, JY ;

Tseng, H ;

Huang, HM ;

Lee, SY .

BIOMATERIALS, 2003, 24 (07) :1167-1173

[5] The application of polyhydroxyalkanoates as tissue engineering materials [J].

Chen, GQ ;

Wu, Q .

BIOMATERIALS, 2005, 26 (33) :6565-6578

[6] Poly(hydroxybutyrate-co-hydroxyhexanoate) promoted production of extracellular matrix of articular cartilage chondrocytes in vitro [J].

Deng, Y ;

Lin, XS ;

Zheng, Z ;

Deng, JG ;

Chen, JC ;

Ma, H ;

Chen, GQ .

BIOMATERIALS, 2003, 24 (23) :4273-4281

[7] Films of PLLA/PHBV: Thermal, morphological, and mechanical characterization [J].

Ferreira, BMP ;

Zavaglia, CAC ;

Duek, EAR .

JOURNAL OF APPLIED POLYMER SCIENCE, 2002, 86 (11) :2898-2906

[8] Miscibility and mechanical properties of blends of (L)-lactide copolymers with atactic poly(3-hydroxybutyrate) [J].

Focarete, ML ;

Scandola, M ;

Dobrzynski, P ;

Kowalczuk, M .

MACROMOLECULES, 2002, 35 (22) :8472-8477

[9] Comparison of miscibility and structure of poly (3-hydroxybutyrate-co-3-hydroxyhexanoate)/poly(L-lactic acid) blends with those of poly (3-hydroxybutyrate)/poly(L-lactic acid) blends studied by wide angle X-ray diffraction, differential scanning calorimetry, and FTIR microspectroscopy [J].

Furukawa, Tsuyoshi ;

Sato, Harumi ;

Murakami, Rumi ;

Zhang, Jianming ;

Noda, Isao ;

Ochiai, Shukichi ;

Ozaki, Yukihiro .

POLYMER, 2007, 48 (06) :1749-1755

[10] Hyperbranched polylactide copolymers [J].

Gottschalk, C ;

Frey, H .

MACROMOLECULES, 2006, 39 (05) :1719-1723

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