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首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >A novel all-purpose epoxy-terminated hyperbranched polyether sulphone toughener for an epoxy/amine system
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A novel all-purpose epoxy-terminated hyperbranched polyether sulphone toughener for an epoxy/amine system

机译：一种新型的通用型环氧封端的超支化聚醚砜增韧剂，用于环氧/胺体系

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摘要

A new epoxide-terminated hyperbranched polyether sulphone (EHBPES) was synthesized using simple one-pot A(2)+B-3 approach. This highly effective toughener can toughen diglycidyl ether of bisphenol A/triethylenetetramine (DGEBA/TETA) curing system without forming phase-separated morphology. Effects of molecular weight (MW) and loading amounts on the mechanical and thermal properties of cure hybrids were investigated. The MW plays an important role in determining the crosslink density and defects of cured networks. Addition of medium-MW EHBPES-2 not only significantly improves toughness and elongation at break but also increases tensile strength and T-g. At 5 wt% loading of EHBPES-2, the cured hybrid shows an elongation at break of 15.3%, impact strength of 50.9 kJ/m(2), and tensile strength of 80.0 MPa. The simultaneous improvements are explained by the higher crosslink density, increased nano-scale cavities, and the inhomogeneous structure of the cured network. (C) 2015 Elsevier Ltd. All rights reserved.
机译：使用简单的一锅A（2）+ B-3方法合成了新的环氧基封端的超支化聚醚砜（EHBPES）。这种高效的增韧剂可以增韧双酚A /三亚乙基四胺（DGEBA / TETA）固化体系的二缩水甘油醚，而不会形成相分离的形态。研究了分子量（MW）和负载量对固化杂化体的机械和热性能的影响。分子量在确定交联密度和固化网络的缺陷方面起着重要作用。添加中分子量EHBPES-2不仅可以显着提高韧性和断裂伸长率，而且还可以提高抗张强度和T-g。在EHBPES-2的5 wt％负载下，固化的杂化体显示断裂伸长率为15.3％，冲击强度为50.9 kJ / m（2），拉伸强度为80.0 MPa。同时的改进可以通过较高的交联密度，增加的纳米级空腔以及固化网络的不均匀结构来解释。 （C）2015 Elsevier Ltd.保留所有权利。

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