电气，电子材料及其复合材料的快速发展，使受通用环氧树脂产品的高功能和高附加值产品的方向，然而，虽然环氧树脂具有良好的综合优势，但同样，存在致命的“脆”的弱点。应用的趋势迅速发展，从而使其日益深入和新的搜索方法，增韧增韧机制增韧机制提供了理论依据，新途径和增韧剂增韧不断涌现。据专家介绍，“海岛结构”是一个增韧，增韧环氧树脂的固化材料为一个多相位系统均相体系。 “海岛结构”是一个增韧剂到环氧树脂中的跨球形颗粒聚集，连续相联系的网络，成为分散相系统，分散相粒径通常是一个几微米或以下。

“海岛结构”增韧剂聚集成一个跨环氧树脂球形颗粒连续相联系的网络，成为分散相，分散相粒径通常是一个几微米或以下。 “海岛结构”的抗开裂性能材料的形成突变情况之一，即是材料的断裂韧性大幅度提高，以及固有的材料，耐热性较小的损失的力学性能。以往的研究对增韧机制的橡胶颗粒，或与高性能塑料的增韧作用为重点的比较，该环氧树脂基体结构的忽视。环氧树脂固化重要事实的网链勃艮第的增韧效果橡胶的平均程度有重大影响。中国环氧树脂行业协会专家表示，当“海岛结构”的分散相粒子的弹性模量相对较低，其主要作用是促使树脂基体屈服和塑性变形发生，从而大大提高断裂韧性。没有“海岛结构”，将无法发挥的树脂存在的变形能源的潜力。当然，发生变形的橡胶颗粒本身，可以有助于撕裂韧性，但只有在非常高的交联密度树脂容易占主导地位时发生变形。

中国环氧树脂行业协会专家表示，“海岛结构”是一个增韧，增韧环氧树脂的固化材料为一个多相位系统均相体系。在环氧树脂固化材料“海岛结构”国内丁腈橡胶树脂上形成实验的增韧效果，发现那里的脚能形成“海岛结构”，断裂的指数增长韧性，热转变温度下降更小，不应该如形成“海岛结构”，即使系统丁腈橡胶来说，他们只能由梁刘柔芬发挥作用，不能称其为增韧剂。基于上述认识，适当的国内发展环氧树脂/酸酐体系的“海岛型”环氧树脂增韧剂，以及100吨年产量，并建立了试验性生产厂。这是一个通过酯或胺酯的客户群不同的活动将是链聚合物混合物的不同类型的联系，在改性环氧树脂/酸酐体系，最根本的原因是，它预固化树脂和相容性，固化过程与它形成颗粒为“岛结构公司”适当分离。

Epoxy resin “islands” toughening mechanism

Electrical, electronic materials and their rapid development of composite materials, so that by the general-purpose epoxy resin products to the high functionality and high value-added product line direction; however, although the epoxy resin has a good comprehensive advantages, but Similarly the existence of the deadly “brittle” weaknesses. Application of the rapid development of the trend, making its toughening mechanism of the increasing depth and Toughening Mechanism of toughening for a new search method provides a theoretical basis, the new Ways and flexibilizer toughening continue to emerge. According to experts, “an island structure” is one of toughening, toughening the cured epoxy materials are homogeneous system into a multi-phase system. “Island structure” was a system that flexibilizer aggregation into spherical particles in epoxy resin cross-linked networks of continuous phase to become dispersed phase, dispersed phase particle diameter is usually a few microns or less.

“island structure” flexibilizer are gathered into a spherical particle in the epoxy resin cross-linked networks of continuous phase to become dispersed phase, dispersed phase particle diameter is usually a few microns or less. “Island structure” one by the formation of anti-cracking performance materials mutation occurs, that is, the fracture toughness of materials substantially improve, and the inherent material mechanical properties, heat resistance smaller losses. Previous research on the toughening mechanism comparison focused on the rubber particles or with the high performance plastics to the role of toughening, the neglect of the epoxy resin matrix structure. Cured epoxy resin material fact the average degree of network chain Burgundy rubber toughening effect has a significant impact. China Epoxy Resin Industry Association experts said, when the “island structure” in the dispersed phase particles are relatively low modulus elastomer, its primary role is to induce resin matrix yielding and plastic deformation occurred, thus substantially improve the fracture toughness . There is no “island structure” will not be able to exert the existence of resin-based Deformation energy potential. Of course, happened deformation of rubber particles themselves, can contribute to tearing of toughness, but only in very high crosslinking density resin easily happen when the dominant deformation.

epoxy Industry Association China experts said, “island structure” is one of toughening, toughening the cured epoxy materials are homogeneous system into a multi-phase system. Domestic CTBN in the epoxy resin curing materials “island structure” is formed on the toughening effects of the experiment and found that where the foot can form “islands structure”, fracture toughness on the exponential growth, thermal transition temperature decreased more small; should not such as to form “island structure”, even if the system CTBN are concerned, they can only play a role by Sophie, could not be called flexibilizer. Based on the above understanding, the domestic development of suitable epoxy / anhydride system, the “island-type” epoxy toughening agent, and an annual output of 100 tons and built a pilot production plant. It is a different activity with a client base through ester or amine ester will be different types of chain link of the polymer mixture, the modified epoxy resin / anhydride system, the fundamental reason is that it pre-curing resin and the miscibility, curing process with which it can form particles suitable for separation of the “island structure” of the company. (07-11-26)