Deformation mechanisms in polylactic acid/natural rubber/organoclay bionanocomposites as revealed by synchrotron X-ray scattering

被引：48

作者：

Bitinis, Natacha ^{[1
]}

Sanz, Alejandro ^{[2
,3
]}

Nogales, Aurora ^{[2
]}

Verdejo, Raquel ^{[1
]}

Lopez-Manchado, Miguel A. ^{[1
]}

Ezquerra, Tiberio A. ^{[2
]}

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, Madrid 28006, Spain

[2] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[3] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain

来源：

SOFT MATTER | 2012年 / 8卷 / 34期

关键词：

FILLED SEMICRYSTALLINE POLYMERS; SMALL-ANGLE; POLY(ETHER ESTER); NANOCOMPOSITES; ORGANOCLAY; BEHAVIOR; CRYSTALLIZATION; MORPHOLOGY; SCAFFOLDS; BLENDS;

D O I：

10.1039/c2sm25729g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The micromechanical deformation mechanisms of a polylactic acid (PLA)/natural rubber (NR) blend (PLA/NR 90/10 wt%) and its organoclay filled bionanocomposites have been investigated by small and wide angle X-ray scattering (SAXS-WAXS) under tensile conditions. The addition of NR to a PLA matrix changed the brittle fracture of PLA to a ductile deformation through the debonding of the rubber droplets. Otherwise, the formation of cavities between PLA and NR was hampered by the nanoclays since they were mainly located at the polymer blend interface. In this case, the nanoclays acted as craze nucleation sites. At 1 wt% of filler concentration, the crazes were able to fully develop in the blend and to evolve into stable microvoids, which kept growing and orienting in the tensile direction. These mechanisms also explained the progressive plastic deformation of the polymer chains and the preferential orientation of the nanoclay platelets.

引用

页码：8990 / 8997

页数：8

共 34 条

[1] Biodegradable polymer matrix nanocomposites for tissue engineering: A review [J].

Armentano, I. ;

Dottori, M. ;

Fortunati, E. ;

Mattioli, S. ;

Kenny, J. M. .

POLYMER DEGRADATION AND STABILITY, 2010, 95 (11) :2126-2146

[2] POLYMER-POLYMER PHASE-BEHAVIOR [J].

BATES, FS .

SCIENCE, 1991, 251 (4996) :898-905

[3] Modification of brittle polylactide by novel hyperbranched polymer-based nanostructures [J].

Bhardwaj, Rahul ;

Mohanty, Amar K. .

BIOMACROMOLECULES, 2007, 8 (08) :2476-2484

[4] Physicochemical properties of organoclay filled polylactic acid/natural rubber blend bionanocomposites [J].

Bitinis, N. ;

Verdejo, R. ;

Maya, E. M. ;

Espuche, E. ;

Cassagnau, P. ;

Lopez-Manchado, M. A. .

COMPOSITES SCIENCE AND TECHNOLOGY, 2012, 72 (02) :305-313

[5] Structure and properties of polylactide/natural rubber blends [J].

Bitinis, N. ;

Verdejo, R. ;

Cassagnau, P. ;

Lopez-Manchado, M. A. .

MATERIALS CHEMISTRY AND PHYSICS, 2011, 129 (03) :823-831

[6] Micro- and nano-scale deformation behavior of nylon 66-based binary and ternary nanocomposites [J].

Dasari, Aravind ;

Yu, Zhong-Zhen ;

Yang, Mingshu ;

Zhang, Qing-Xin ;

Xie, Xiao-Lin ;

Mai, Yiu-Wing .

COMPOSITES SCIENCE AND TECHNOLOGY, 2006, 66 (16) :3097-3114

[7] Uneven distribution of nanoparticles in immiscible fluids: Morphology development in polymer blends [J].

Fenouillot, F. ;

Cassagnau, P. ;

Majeste, J. -C. .

POLYMER, 2009, 50 (06) :1333-1350

[8] 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

[9] Structure-property relationships on uniaxially oriented carbon nanotube/polyethylene composites [J].

Gorrasi, Giuliana ;

Di Lieto, Roberta ;

Patimo, Giovanni ;

De Pasquale, Salvatore ;

Sorrentino, Andrea .

POLYMER, 2011, 52 (04) :1124-1132

[10] In-situ deformation studies of rubber toughened poly(methyl methacrylate): Influence of rubber particle concentration and rubber cross-linking density [J].

He, CB ;

Donald, AM ;

Butler, MF .

MACROMOLECULES, 1998, 31 (01) :158-164

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