室温硫化氯磺化聚乙烯防水卷材的研制

以氯磺化聚乙烯（ＣＳＭ）为基材，通过对多种配合剂的变量试验，最后确定了防水卷材的配方。该胶料的各种物理性能均达到了美国ＡＳＴＭ标准规定的指标，与国内外几种商品防水卷材的性能相当。该防水卷材胶料的研制，主要解决了室温硫化的技术关键。     

增塑剂TP-759用量对不同硫化体系AEM硫化胶性能的影响

研究了聚酯/聚醚型增塑剂TP-759用量对乙烯丙烯酸酯橡胶(AEM)力学性能及老化性能的影响,并对比了不同硫化体系硫化的AEM硫化胶的性能。结果表明:添加TP-759可使老化前的AEM硫化胶的拉伸强度和撕裂强度下降,拉断伸长率提高到620%;但老化后的AEM硫化胶的拉伸强度和撕裂强度有所增加。胺类硫化剂硫化的AEM具有较优异的性能。     

水泥在乙丙橡胶防水材料中应用的初探

研究了复合硅酸盐水泥用量对三元乙丙橡胶防水卷材的物理机械性能的影响,发现当水泥用量不超过110份时,其拉伸强度、撕裂强度与伸长率均能满足国家标准的要求。     

Influence of the rubber blend ratio on blowout behaviors of carbon black‐reinforced natural rubber/styrene‐butadiene rubber

Blowout behaviors of NR/SBR blend composites reinforced with carbon black were studied using a microwave oven and variation of the blowout time and temperature with the blend ratio was investigated. Morphology of the interior of the sample before exploding was observed and change of the crosslink density was measured. The blowout time became slower and the blowout temperature became higher as the SBR content of the specimen increased. The specimen with higher NR content had more cavities in the interior just before explosion. The crosslink density became lower by coming close to the blowout and crosslink density of the inner part was more reduced than that of the outer part. New organic materials were found in the burst region after blowout and they might be decomposed products of the polymer chains. The SBR specimen showed better blowout properties than the NR one. Principal sources to cause the blowout were found to be formation of the cavities in a rubber article, reduction of the crosslink density, and dissociation of the rubber chains. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

利用防老剂H提高HTPB聚氨酯复合材料综合性能

研究了N,N’-二苯基对苯二胺(防老剂H)对端羟基聚丁二烯(HTPB)／TDI低固体填料含量复合材料性能的影响。优化防老剂H和TDI的加入量,提高了低固体填料含量HTPB／TDI的力学性能。将试验结果应用于高固体填料含量HTPB／TDI复合材料,获得了具有良好力学性能的高固体填料含量的HTPB／TDI复合材料配方。     

Effects of Surface Treatments on Mechanical Properties and Water Resistance of Kenaf Fiber-Reinforced Unsaturated Polyester Composites

Abstract

Effects of surface treatments on the strength and water resistance of kenaf fiber-reinforced unsaturated polyester (UPE) composites were investigated. A new coupling agent that consists of 1,6-diisocyanato-hexane (DIH) and 2-hydroxylethyl acrylate (HEA) was investigated for surface treatments of kenaf fibers. The surface treatments were found to significantly enhance the tensile strength, modulus of rupture, modulus of elasticity, and water resistance of the resulting kenaf–UPE composites. Fourier transform infrared spectroscopy (FTIR) confirmed that DIH-HEA was covalently bonded onto kenaf fibers. Scanning electron microscopy (SEM) images of the composites revealed that chemical treatment of kenaf fibers with a combination of DIH and HEA improved the interfacial adhesion between kenaf fibers and UPE resin in the DIH–HEA-treated kenaf–UPE composites. The mechanisms by which the chemical treatment of kenaf fiber surfaces improved strength and water resistance of the resulting kenaf–UPE composites were discussed.