Relationships between Nanostructure and Thermomechanical Properties in Poly(vinyl alcohol)/Montmorillonite Nanocomposite with an Entrapped Polyelectrolyte

被引：10
|
作者：
Paranhos, Caio M. [1 ,2 ]
Dahmouche, Karim [2 ]
Zaioncz, Soraia [1 ]
Soares, Bluma G. [1 ]
Pessan, Luiz A. [3 ]
机构：
[1] Univ Fed Rio de Janeiro, Ctr Tecnol, Inst Macromol, Ilha Fundao, BR-21945970 Rio De Janeiro, Brazil
[2] State Univ Zona Oeste, BR-23070200 Rio De Janeiro, Brazil
[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2008年 / 46卷 / 23期
关键词：
hydrogels; nanocomposites; poly(vinyl alcohol); small angle X-ray scattering (SAXS);
D O I：
10.1002/polb.21586
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(vinyl alcohol)/montmorillonite (PVA/MOM) hydrogels containing coacervated microparticles of sulfonated polyester (PES) were prepared by direct mixture of the components in water. The system was characterized by using differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), and dynamical mechanical analysis (DMA). The influence of PES and MOM on the microstructure of the nanocomposite hydrogels was established. The presence of PES causes a significant change on the crystallinity of PVA. Furthermore, the presence of MOM leads to a hierarchical nanostructure that also contributes to change the crystallinity of PVA. The results of structural investigation are correlated with the mechanical properties of the composites obtained by DMA. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 2618-2629, 2008
引用
收藏
页码：2618 / 2629
页数：12
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