Effects of the nanoparticles on the thermal expansion and mechanical properties of unsaturated polyester/clay nanocomposites

被引:52
作者
Chieruzzi, Manila [1 ]
Miliozzi, Adio [2 ]
Kenny, Jose M. [1 ,3 ]
机构
[1] Univ Perugia, Civil & Environm Engn Dept, UdR INSTM, I-05100 Terni, Italy
[2] ENEA Italian Natl Agcy New Technol Energy & Susta, Casaccia Res Ctr, I-00123 Rome, Italy
[3] ICTP CSIC, Inst Polymer Sci & Technol, Madrid 28006, Spain
关键词
Polymer-matrix composites; Nano-structures; Thermal properties; Mechanical testing; LAYERED SILICATE NANOCOMPOSITES; POLYMER/MONTMORILLONITE NANOCOMPOSITES; STABILITY; MONTMORILLONITE; BEHAVIOR;
D O I
10.1016/j.compositesa.2012.09.016
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The thermal stability of nanocomposites based on unsaturated polyester resin (UP) and montmorillonite (MMT) clays is reported. The coefficients of thermal expansion (CTE) of both neat resin and nanocomposites with various concentrations of MMT were measured and it was found that the incorporation of clay particles reduced the CTE of the polyester resin. This reduction results greater at the lower MMT concentration tested (5 wt.%). Calorimetric tests also showed that the presence of nanoclays affects the kinetics of the curing reaction and the final degree of reaction reached by the unsaturated polyester resin. Bending and tensile tests revealed that higher percentages of MMT induced higher Young's modulus while the introduction of a viscosity reducer resulted in worst mechanical performances. The fragile behaviour observed for the formulations with higher nanoclay content were confirmed by the typical cleavage surfaces of the fracture borders observed by scanning electron microscopy. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:44 / 48
页数:5
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