增韧聚丙烯导电纳米复合材料研究

以碳纳米管（CNT）作为导电组分，以乙烯一辛烯共聚物（POE）作为增韧剂，通过熔融复合制备PP／POE／CNT三组分纳米复合材料，研究微观结构与电导率和缺口冲击强度的关系。实验结果表明：PP／CNT两组分纳米复合材料由电绝缘体向半导体的逾渗转变发生在CNT质量含量为2～3％时。POE的加入延迟了纳米复合材料的逾渗转变，这说明POE的存在延缓了纳米复合材料中导电通路的形成。重要的是，30％POE赋予了导电纳米复合材料超高韧性。

尼龙-6纤维织物的阻燃研究进展

综述了近年来阻燃尼龙-6(PA-6)纤维织物的阻燃机理和研究进展,重点总结了适用于阻燃尼龙-6纤维织物的耐久性阻燃剂,如羟基化的有机磷低聚体等阻燃剂,并回顾了近期在尼龙-6纤维中尝试加入纳米黏土,通过增强炭层性能对其阻燃性的研究。

α,α-二溴乙酸乙酯作双官能引发剂ABA型嵌段共聚物的合成

Ethyl α,α dibromoacetate was confirmed to be a difunctional initiator for the atom transfer radical polymerization of n butyl acrylate by means of gel penetration chromatography. When the polymerization of n butyl acrylate was carried out at different molar ratios of ethyl α,α dibromoacetate and ethyl α bromopropionate with CuBr/2,2′ bipyridine as the catalyst, polymers with bimodal molecular weight distributions were obtained, consisting of two narrowly distributed fractions, one of which was of a molecular weight double the other. Poly( n butyl acrylate) obtained with ethyl α,α dibromoacetate as the difunctional initiator was further used as the macroinitiator for styrene and methyl methacrylate in the presence of CuBr/2,2′ bipyridine respectively to prepare ABA triblock copolymers. It was found that high blocking efficiency was obtained for styrene. However, the polymer with bimodal molecular weight distribution was obtained for methyl methacrylate with a low molecular weight peak corresponding to that of poly( n butyl acrylate) macroinitiator. If the blocking polymerization was conducted with CuCl/ 2,2′ bipyridine as the catalyst to replace CuBr/2,2′ bipyridine, a high blocking efficiency was also obtained. [WT5HZ]

硬质交联发泡聚氯乙烯板材的研究进展

介绍了硬质交联发泡聚氯乙烯板材的结构性能、国内外发展现状及其发展前景;硬质交联发泡聚氯乙烯板材具有阻燃性能,有望取代现有的三大泡沫塑料,成为新型节能保温材料;国外生产的硬质交联发泡聚氯乙烯板材产品性能优异,而国内其工业化生产属于空白。与现有建筑用发泡塑料对比,硬质交联发泡聚氯乙烯性能更加优越,其应用前景更加广阔。