聚苯硫醚／聚砜共混物的动态黏弹行为及相容性研究

研究了聚苯硫醚／聚砜熔融共混物的的加工流变行为以及共混物在不同温度下的动态黏弹响应；并对其相容性作出判断。结果表明，聚苯硫醚的加入显著改善了共混物的流动性，使其可在较低温度下成型；熔融态共混体系的相容性较差，固态条件下的相分离程度及损耗因子峰值大小依赖于组成变化。     

PPS的共混改性

简要介绍了聚苯硫醚(PPS)与其他聚合物进行共混改性的研究进展。着重讨论了PPS PA66、PPS PC、PPS PPO等的共混及其性能。此外,展望了PPS合金的发展前景。     

PPO/PA合金的研制

比较了三条技术路线、PPO／PA质量比、各种抗冲击剂对PPO／PA合金性能的影响。应用FTIR．Molau实验、DSC曲线证实了改性反应原理及增容作用。结果表明：在双螺杆挤出机中，聚苯醚(PPO)与马来酸酐(MAH)接枝反应，然后与聚酰胺(PA66)、SEBS挤出共混，制成的PPO／PA合金，抗冲击性能高。     

聚芳硫醚类树脂的研究及其产业化

主要介绍了几种聚芳硫醚类高性能树脂(聚苯硫醚、聚芳硫醚砜、聚芳硫醚酮、聚芳硫醚酰亚胺以及聚芳硫醚腈)的性能、研究动向以及产业化情况;并对今后聚芳硫醚类树脂的研究、发展趋势进行了预测。     

PPS/CaCO_3复合材料界面应力分布的三维有限元模拟

以碳酸钙粒子(CaCO_3)填充聚苯硫醚(PPS)粒子为研究对象,用ANSYS/LS-DYNA软件对复合材料冲击过程中界面应力分布进行了有限元分析。结果表明:在粒子的赤道处,正应力、剪切应力和等效应力均为最大,朝极点方向迅速减小,在距赤道约0.5~2.0μm之间达致最低点,然后趋于平缓或略微回升。并介绍了PPS/CaCO_3复合材料在冲击载荷下失效或断裂的主要机理。     

酞侧基聚芳醚砜／聚苯硫醚共混物的断裂韧性

本文通过有缺口和无缺口冲击试验、断裂韧性测试以及结合扫描电镜分析断面形貌，研究了酞侧基聚芳醚砜／聚苯硫醚共混物的断裂行为，讨论了聚苯硫醚增韧聚芳醚砜的机理。结果表明，共混物冲击强度的改善主要是由于其裂纹引发能的提高；共混物断裂韧性提高的原因是由于外加应力场在ＰＰＳ微纤附近产生应力集中，促使基体和微纤都发生塑性形变，从而吸收更多的能量所致。     

2018～2019年世界塑料工业进展(Ⅱ)

收集了2018年7月~2019年6月世界工程塑料和特种工程塑料工业的相关资料,介绍了2018~2019年世界工程塑料和特种工程塑料工业的发展情况,按工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯)和特种工程塑料(聚苯硫醚、液晶聚合物、聚醚醚酮、聚芳砜、聚邻苯二甲酰胺)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍。     

低介电常数电路板用烯丙基化聚苯醚树脂

本文对国外低介电常数印刷电路板用热固性烯丙基化聚苯醚树旨的制备工艺与性能进行了探讨。     

在酸性介质中聚苯硫醚对钯的吸附行为

研究了聚苯醚硫（ＰＰＳ）在硝酸、硫酸和盐酸介质中对贵金属钯的吸附行为及振荡吸附时间、酸度、钯浓度对吸附的影响。结果表明：在不同的酸介质中ＰＰＳ对钯均有一定量的吸附，其饱和吸附容量可达１０．７８±１．０９ｍｇ／ｇ树脂，且有很好的吸附选择性，还探索了解吸剂及从混合离子溶液中回收钯的途径。     

Effect of transfer film structure, composition and bonding on the tribological behavior of polyphenylene sulfide filled with nano particles of TiO2, ZnO, CuO and SiC

The tribological behavior of polyphenylene sulfide (PPS) filled with inorganic nano particles was studied. The fillers investigated were TiO₂, ZnO, CuO and SiC whose sizes varied from 30 to 50 nm. The polymer composites were compression molded with varying proportions of these fillers. Wear and friction tests were performed in a pin-on-disk configuration at a sliding speed of 1.0 m/s, nominal pressure of 0.65 MPa, and counterface roughness of 0.10 μm Ra. The polymer composite pins slid against hardened tool steel counterfaces. The transfer films of the composite materials formed on the counterfaces during sliding were studied by optical microscopy and X-ray photoelectron spectroscopy (XPS) and the adhesion between the transfer film and counterface was measured in terms of the peel strength. It was found that the wear rate of PPS decreased when TiO₂ and CuO were used as the fillers but increased with ZnO and SiC fillers. The optimum wear resistance was obtained with 2 vol.% CuO or TiO₂. These filled composites had the coefficients of friction lower than that of the unfilled PPS. The wear behavior of the composites is explained in terms of the topography of transfer film and adhesion of transfer film to the counterface as observed from peel strength studies. There is a good correlation observed between the transfer film-counterface bond strength and wear resistance.