PHBV nanocomposites based on organomodified montmorillonite and halloysite: The effect of clay type on the morphology and thermal and mechanical properties

被引:138
作者
Carli, Larissa N. [1 ,2 ]
Crespo, Janaina S. [2 ]
Mauler, Raquel S. [1 ]
机构
[1] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil
[2] Univ Caxias Sul, Ctr Ciencias Exatas & Tecnol, BR-95070560 Caxias Do Sul, RS, Brazil
关键词
Thermoplastic resin; Nano-structures; Thermal properties; Mechanical properties; TENSILE PROPERTIES; DEGRADATION; NANOTUBES; POLYHYDROXYBUTYRATE; BIODEGRADATION; TEMPERATURE; BEHAVIOR;
D O I
10.1016/j.compositesa.2011.07.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The aim of this study was to evaluate the effect of the addition of two types of nanoparticles, organomodified montmorillonite Cloisite (R) 30B (C-30B), and a tubular like clay, halloysite (HNT), on the morphology and thermal and mechanical properties of poly(hydroxybutyrate-co-hydroxyvalerate) - PHBV nanocomposites. TEM and WAXD results showed a combination of a few tactoids and a partially exfoliated structure for PHBV/C-30B nanocomposites and a good dispersion of HNT in the PHBV matrix. DSC analysis indicated a lower nucleation density with the addition of nanoparticles. Furthermore, the presence of C-30B led to the formation of double melting peaks, related to different crystalline phases. However, a higher melting temperature was obtained for PHBV/HNT nanocomposites. A general increase in the Young's modulus was observed. However, for PHBV/C-30B nanocomposites, this enhancement was at the expense of the strain at break and impact strength, probably due to the degradation of the polymer during processing. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1601 / 1608
页数:8
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