Mechanical Properties of CFRP Using Tg-less Epoxy Resin as Matrix
Mechanical Properties of CFRP Using Tg-less Epoxy Resin as Matrix
复制标题
以无Tg环氧树脂为基体的CFRP的力学性能
DOI：
10.6089/jscm.35.74
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
G. Ben
中科院分区：
文献类型：
--
作者：
N. Hirayama;A. Shoji;H. Nishida;G. Ben
纤维增强塑料（FRP）以其重量轻、比强度和模量高的优点被应用于各个领域。然而，除了经济性和成型工艺之外，它们还存在一些问题，例如对于一般车辆和建筑物来说耐热性能较差。最近，开发了无Tg环氧树脂。由于使用羧酸钾盐作为催化剂，其弹性模量在高温下也不会降低。尝试对具有低 Tg 环氧树脂基体的 CFRP 和 GFRP 进行成型并评估其机械性能。无Tg环氧GFRP显示出高耐热性能。然而，无Tg环氧CFRP的弯曲模量和强度低于预期。在本报告中，我们解释了碳纤维用上浆剂抑制了碳纤维界面上无Tg环氧树脂的阴离子聚合。然后，我们对碳纤维上的上浆剂进行洗涤或中和后，提高了无Tg环氧CFRP的弯曲模量和强度。此外，我们还评估了无 Tg 环氧 CFRP 在高温下的蠕变性能。
Fiber reinforced plastics (FRPs) are used in various fields for their light-weigh and their superiority of high specific strength and modulus. However, there are several issues such as their poor heat resistant property for the general vehicles and the constructions, other than the economy and molding process. Recently, Tg-less epoxy resin is developed. Its elastic modulus does not decrease up to a high temperature due to using potassium carboxylate salt as a catalyst. CFRP and GFRP with the Tg-less epoxy resin matrix were tried to mold and their mechanical properties for evaluation. The Tg-less epoxy GFRP revealed the high heat resistant property. However, the bending modulus and the strength of the Tg-less epoxy CFRP were lower than those of expected. In this report, we explain that the sizing agent for carbon fibers inhibit the anionic polymerization of the Tg-less epoxy resin on the interfacial surface of the carbon fibers. Then we improve the bending modulus and the strength of the Tg-less epoxy CFRP after washing or neutralizing of the sizing agent on the carbon fibers. Moreover we evaluate creep properties of the Tg-less epoxy CFRP under high temperatures.