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Tensile behaviour of rubber-modified polyester resin materials

机译：橡胶改性聚酯树脂材料的拉伸行为

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摘要

Polymer blends comprising an unsaturated polyester resin and dispersed particles were prepared. Rubbery particles were synthesized by sequential emulsion polymerization and had core-shell morphology. Curing of materials was carried out at ambient temperature and subsequently post cured at elevated temperatures to obtain materials of consistent properties. Materials made of different particle content were prepared and their tensile properties evaluated. Effect of matrix ductility was investigated by inclusion of ethyl acrylate in the polyester resin composition. Deformation mechanisms involved in these materials were examined using transmission electron microscopy (TEM) and real-time small angle X-ray spectroscopy (RT-SAXS). Incorporation of rubbery particles in the polyester resin was found to generally improve the tensile properties of the materials. Furthermore, the deformation mechanisms were found to involve cavitation/debonding processes as evidenced from stress whitening in the failed specimen and from real-time small angle X-ray scattering experiments.
机译：制备包含不饱和聚酯树脂和分散的颗粒的聚合物共混物。通过顺序乳液聚合合成橡胶状颗粒，并具有核-壳形态。材料的固化在环境温度下进行，然后在高温下进行后固化，以获得具有一致性能的材料。制备具有不同颗粒含量的材料，并评估其拉伸性能。通过在聚酯树脂组合物中包含丙烯酸乙酯来研究基质延展性的影响。使用透射电子显微镜（TEM）和实时小角度X射线光谱（RT-SAXS）检查了这些材料中涉及的变形机制。发现在聚酯树脂中掺入橡胶状颗粒通常可以改善材料的拉伸性能。此外，发现变形机制涉及空化/脱胶过程，这从失效样本中的应力变白和实时小角度X射线散射实验中可以看出。

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