聚氨酯包覆空心玻璃微珠改性环氧复合材料的制备与性能研究  

Preparation and Properties Research of Epoxy Composites Modified by Hollow Glass Bead Treated with Polyurethane

作　　者：白战争[1,2] 赵秀丽[1] 罗雪方[1,2] 罗世凯[1] 刘勇[1,3] 

机构地区：[1]中国工程物理研究院化工材料研究所 [2]西南科技大学材料科学与工程学院 [3]中国人民解放军96411部队

出　　处：《塑料工业》2009年第9期9-12,21,共5页China Plastics Industry

基　　金：中国工程物理研究院科学技术发展基金资助项目(2007B03003)

摘　　要：对空心玻璃微珠进行了聚氨酯弹性体包覆改性,然后将其引入到自制的环氧-聚氨酯共聚物(EP-PU)中,制备了聚氨酯包覆空心玻璃微珠改性环氧复合材料,采用XPS、SEM手段对改性后的空心微珠进行了表征,并考察了改性后空心玻璃微珠的引入对固化物性能的影响。结果表明,空心玻璃微珠的表面化学改性改善了其与树脂基体的相容性,当空心玻璃微珠的用量达到树脂质量的20%时,复合材料的密度由原来的1.113 g/cm3降到0.864 g/cm3,降低了22.37%;线性固化收缩率也明显降低,从而增加其固化物的尺寸稳定性。空心玻璃微珠的引入固化物的韧性较好,密度和线性固化收缩率降低。其增韧机理以空心微珠的阻止裂纹扩展和聚氨酯的"海岛结构"为主。Hollow glass bead （HGB） was covered and treated with polyurethane composites, and was induced into a self-made epoxy-polyurethane （EP-PU） system, epoxy composites modified by HGB treated with PU was prepared. Hollow glass bead after treated was characterized by X-ray photoelectron （XPS） spectroscopy and scanning electron microscopy （SEM） and studied its effect on the properties of cured materials. The result showed that compatibility between HGB and resin was improved by HGB surface chemistry modification, when the content of the HGB was up to 20% of the content of resin, the composites＇ density decreased from 1. 113 g/em3to 0. 864 g/em3, decreased by 22. 37% ; Linear cured shrinkage rate decreased significantly, thus increased its dimensional stability of the curing material. The introduction of HGB made better toughness of cured materials, and decreased the density and linear shrinkage curing rate. The toughening mechanism was mainly the crack growth prevention of the HGB and ＂island structure＂ of PU.

关 键 词：环氧树脂 空心玻璃微珠 聚氨酯预聚体 增韧 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]