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首页> 外文期刊>Journal of Applied Polymer Science >Morphology and mechanical properties of dual-curable epoxyacrylate hybrid composites
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Morphology and mechanical properties of dual-curable epoxyacrylate hybrid composites

机译：双固化环氧丙烯酸酯杂化复合材料的形貌和力学性能

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A dual-curable epoxyacrylate (EA) oligomer with one epoxide group and one vinyl group at each end was synthesized for the application as adhesive sealant in the liquid crystal display panels. However, after UV and thermal cure, the EA resin was brittle with a poor resistance to crack initiation and propagation. Liquid rubbers with different functional end groups were thus tried as toughening agents for the EA resin. Among all the rubber-toughened EAs, the EA-V5A5 added with vinyl-terminated and amino-terminated butadiene-acrylonitrile copolymers (VTBN and ATBN) each at 5 phr had the highest fracture toughness, tensile strength, and elongation at break but a lower initial modulus. To raise the modulus, submicron-sized silica particles (similar to 170 nm) with surface vinyl functional groups were further added to the EA-V5A5 to prepare the hybrid composites. Because of interfacial chemical bonding provided by the surface vinyl functional groups, both modulus and fracture toughness were increased by adding silica particles, without any appreciable decrease in extensibility. For the hybrid composite at 20 phr silica particles, the initial modulus, fracture toughness, and fracture energy were raised by 10.3, 100, and 267%, respectively, when compared to the neat epoxyacrylate. Owing to their strong interfacial bonding, the increase of fracture toughness was mainly due to the crack deflection and bifurcation on silica particles, in addition to the rubber particle bridging and tearing as evidenced by SEM pictures on the fracture surface. (C) 2014 Wiley Periodicals, Inc.
机译：合成了在每个末端具有一个环氧基和一个乙烯基的双固化环氧丙烯酸酯（EA）低聚物，以用作液晶显示面板中的粘合剂密封剂。但是，经过紫外线和热固化后，EA树脂变脆，并且对裂纹萌生和扩展的抵抗力很差。因此尝试使用具有不同官能端基的液态橡胶作为EA树脂的增韧剂。在所有橡胶增韧的EA中，EA-V5A5分别添加了5 phr的乙烯基封端的和氨基封端的丁二烯-丙烯腈共聚物（VTBN和ATBN），具有最高的断裂韧性，拉伸强度和断裂伸长率，但较低初始模量。为了提高模量，将具有表面乙烯基官能团的亚微米级二氧化硅颗粒（类似于170 nm）进一步添加到EA-V5A5中，以制备杂化复合材料。由于表面乙烯基官能团提供了界面化学键，通过添加二氧化硅颗粒，模量和断裂韧性均得到了提高，而延伸性却没有明显降低。与纯环氧丙烯酸酯相比，对于20 phr二氧化硅颗粒的杂化复合材料，初始模量，断裂韧性和断裂能分别提高了10.3％，100％和267％。由于其牢固的界面结合，断裂韧性的增加主要归因于二氧化硅颗粒上的裂纹变形和分叉，以及橡胶颗粒在断裂表面上的弥合和撕裂，以及断裂时的SEM照片所证实。 （C）2014威利期刊公司

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