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首页> 外文期刊>Journal of Applied Polymer Science >Effects of Mixing Temperatures on the Morphology and Toughness of Epoxy/Polyamide Blends
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Effects of Mixing Temperatures on the Morphology and Toughness of Epoxy/Polyamide Blends

机译：混合温度对环氧/聚酰胺共混物形态和韧性的影响

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摘要

A new mixing process was explored to increase further the fracture toughness and to investigate the toughening mechanisms of epoxyylon blend. In this process, without mechanical mixing, the mixtures of epoxy and premade nylon 6 powder were heated without the curing agent to specific tempertures, referred to as the“mixing temperature”. For epoxyylon blends, at sufficiently high temepratures, a semi-interpenetrating network-like structure can be developed at the interphase via the reaction between the amine end group and the epoxide group. The depth of interphase and the extent of reaction depends on the mixing temperature. The strong dependency of the fracture energy on mixing temperature reveals the positive effect of the newly developed structure at the interphase. The increase of fracture reveals the positive effect of the newly developed structure at the interphase. The increase of fracture toughness is possibly due to the enhanced crack fingering bifurcation/deflection mechanism resulting from the lamellae developed in the interphase and the enhanced plastic deformation of epoxy as a result of preyielding of the interphase.
机译：探索了一种新的混合工艺，以进一步提高断裂韧性，并研究环氧/尼龙共混物的增韧机理。在该过程中，在没有机械混合的情况下，将环氧和预制尼龙6粉末的混合物在没有固化剂的情况下加热到特定温度，称为“混合温度”。对于环氧/尼龙共混物，在足够高的温度下，可通过胺端基与环氧基之间的反应在中间相形成半互穿网络状结构。相间深度和反应程度取决于混合温度。断裂能对混合温度的强烈依赖性揭示了新开发的结构在相间的积极作用。裂缝的增加揭示了新开发的结构在相间的积极作用。断裂韧性的增加可能归因于在相间形成的薄层导致的裂纹指叉分叉/挠曲机制增强，以及由于相间预生成而导致的环氧树脂塑性变形增强。

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