共查询到19条相似文献,搜索用时 46 毫秒
1.
利用非弹性体可以使一些韧性较差的高分子材料达到有效增韧的目的,从热塑性塑料增韧体系、核壳粒子增韧体系、液晶高聚物增韧体系及无机刚性粒子增韧体系等方面分别进行了概述。综述了近年来科研工作者对非弹性体增韧高分子材料的研究进展状况。 相似文献
2.
无机刚性粒子增韧高分子研究进展 总被引:15,自引:0,他引:15
综述了高分子基体、无机粒子形态及粒径与粒径分布、偶联剂、界面作用及界面相形态等对无机刚性粒子增韧效果的影响,介绍了目前该领域的研究状况和存在的问题。 相似文献
3.
4.
本文介绍了非弹性体增韧和弹性体与非弹性体结合增韧聚丙烯的两种改性手段,指出非弹性体增韧作为一种新的增韧方法,有可能成为制备高强度高韧性工程塑料的一种新途径. 相似文献
5.
6.
聚合物增强增韧机理研究进展 总被引:12,自引:3,他引:9
综述了聚合物增强增韧机理,包括弹性体增韧机理、非弹性体增强增韧机、自增强增韧机理,对微观结构上预测复合材料力学行为的最新定量化模型及影响因素进行了分析,提出了今后聚合物增强增韧研究的重点与发展方向。 相似文献
7.
探讨了国内外尼龙材料增韧研究的现状,目前尼龙材料增韧主要集中于以下几个方面:用尼龙与弹性体共混制备超韧尼龙,包括聚烯烃类弹性体增韧尼龙,苯乙烯类嵌段共聚物增韧尼龙,核-壳型冲击改性剂增韧尼龙,以及离聚物为增容剂增韧尼龙;无机刚性粒子增韧尼龙,能在提高材料的抗冲击性能的同时,保证不降低其拉伸强度和刚性;有机刚性粒子增韧尼龙。 相似文献
9.
11.
聚丙烯增韧改性最新进展 总被引:7,自引:0,他引:7
聚丙烯(PP)脆性高、缺口冲击强度低,特别在低温时尤为严重,其增韧改性是扩大PP使用范围的重要方法。综述近2年增韧PP的最新研究进展,介绍橡胶或弹性体共混增韧、热塑性塑料增韧、无机刚性粒子增韧、纳米粒子增韧及晶须增韧PP的最新研究情况。重点介绍了纳米粒子增韧PP的研究,并且指出纳米粒子/弹性体协同增韧PP将是未来PP增韧改性的主要研究方向。 相似文献
12.
13.
This article describes the use of hyperbranched polyester oligomers (HBPs) as modifiers for epoxy thermosets. The effect of HBP molar mass, end group, and loading on prepolymer viscosity, thermoset fracture toughness, Tg, and high‐temperature dynamic storage modulus (E′) were measured. The HBP molar mass was systematically increased from nominal values of ∼ 1750 g mol (Generation 2, or G2) up to ∼ 14,000 g mol (Generation 5, or G5), which corresponds from a low of two layers of monomer up to a maximum of five layers of monomer around the central core. Toughness increased only modestly with the molar mass of the HBP. At 7% loading in the epoxy thermoset, the G5 HBP increased toughness by ∼ 60% over the untoughened control. Toughness increased to 82% above the untoughened control at a loading of 19% G5 HBP, but the toughness decreased at 28% HBP loading. The Tg and E′ were influenced by the HBP modifier, but the effect was not systematic and may have been due to competing effects of HBP molar mass and end group. The effect of the architecture of the thermoplastic modifier was investigated by introducing a linear aliphatic polyester (∼ 5400 g mol) with a repeat unit structure, which was similar to that of the HBP. At the molecular weight range investigated, neither the prepolymer viscosity nor the thermoset toughness of the HBP–epoxy was significantly different from that of the linear polyester in epoxy. Preliminary results are presented showing the effect of thermoplastic molecular weight and architecture on morphology. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 151–163, 1999 相似文献
14.
15.
概述了无机刚性粒子增韧改性UPVC的研究及发展的现状,阐述了无机刚性粒子增韧UPVC的机理及影响因素,总结目前国内增韧UPVC的无机刚性粒子的种类、方法、特点以及UPVC/无机刚性粒子复合材料的应用。 相似文献
16.
17.
18.
Recent advances in polymer shape memory 总被引:1,自引:0,他引:1
Tao Xie Author Vitae 《Polymer》2011,52(22):4985-5000
Traditional shape memory polymers (SMPs) are those capable of memorizing a temporary shape and recovering to the permanent shape upon heating. Although such a basic concept has been known for half a century, recent progresses have challenged the conventional understanding of the polymer shape memory effect and significantly expanded the practical potential of SMPs. In this article, notable recent advances in the field of SMPs are highlighted. Particular emphasis is placed on how the new developments have changed the conventional view of SMPs, what they mean for practical applications, and where the future opportunities are. 相似文献