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聚苯硫醚共混合金的研究进展 总被引:2,自引:2,他引:2
综述近年来聚苯硫醚(PPS)共混合金的研究进展,分别从形态结构(PPS/结晶性共混体系、PPS/非晶性共混体系)和性能(PPS/通用工程塑料共混体系、PPS/特种工程塑料共混体系)两个角度对PPS共混合金进行了较为详尽的总结,并展望了PPS共混合金的发展趋势。 相似文献
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通过熔融共混制备了聚苯硫醚/无苯基聚甲基乙烯基硅氧烷(PPS/NPMVS)共混物及聚苯硫醚/单苯基聚甲基乙烯基硅氧烷(PPS/SPMVS)共混物,并对该共混物体系的微观形貌及力学性能进行了分析表征。结果表明,弹性体在共混物中均匀分散,弹性体的加入对PPS基体起到明显的增韧效果;当弹性体的含量为3 %(质量分数,下同)时,2种共混材料的增韧性能最佳,PPS/NPMVS共混材料的断裂伸长率相对于PPS基体提高了3.9倍,PPS/SPMVS共混材料的断裂伸长率相对于PPS基体提高了2.4倍;当NPMVS含量为10 %时,PPS/NPMVS共混材料的冲击强度相对于PPS基体提高了1.8倍,当SPMVS含量为3 %时,PPS/SPMVS共混材料的冲击强度相对于PPS基体提高了1.4倍。 相似文献
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采用熔融挤出、注射成型的方法制备了含二氮杂萘酮结构聚醚砜(PPES)和聚苯硫醚(PPS)共混物,对共混物的熔融加工性能、相容性以及力学性能能进行了研究。结果表明,共混物的熔体流动速率随着PPS含量的增加而增加,且当PPS含量较少时,共混物的熔体流动速率即有大幅度的上升;该共混物为热力学不相容体系;随着PPS含量的增加,共混物的力学性能先降低后上升,且当PPS含量约为30 %(质量分数,下同)时,共混物的力学性能最低。 相似文献
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本文运用动态力学分析(DMA)手段研究了聚苯硫醚(PPS)和聚醚砜(PES)熔融挤出共混物的相容性、界面行为,PPS对PES低温β转变的影响,以及热处理对PPS、PES及其共混物动态力学行为的影响。结果表明:热处理对PPS、PES以及PPS/PES共混物的动态力学行为有深刻影响。 相似文献
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以聚苯硫醚(PPS)和聚丙烯(PP)为原料,采用熔融共混纺丝法制备PPS/PP共混海岛纤维,经对二甲苯溶除剥离基体相PP,制得PPS超细纤维;研究了共混纺丝温度、共混比例、拉伸、溶解剥离对PPS超细纤维形态结构的影响。结果表明:PPS/PP最佳共混纺丝温度为290~300℃;随着PPS/PP质量比增大,PPS超细纤维直径逐渐变大,PPS/PP质量比从30/70增至60/40时,PPS超细纤维平均直径从228 nm增至408nm;当PPS/PP质量比大于60/40时,开始出现相转变现象;提高拉伸倍数有利于PPS超细纤维的细化,PPS/PP质量比为40/60时,3倍拉伸得到PPS超细纤维的直径分布范围为158~488 nm,平均直径为312 nm,大于3倍拉伸时,易出现毛丝断丝现象;当对二甲苯体积与共混纤维质量比为500∶1时,PPS超细纤维的最佳剥离温度为120℃、剥离时间2 h。 相似文献
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研究了聚砜/聚苯硫醚(PSF/PPS)共混物的动态流变特征、共混物动态热力学行为及力学性能,并分析了相容性与力学性能的关系。结果表明,PPS的加入显著改善了共混物的流动性,共混物的黏度随PPS含量和温度的上升而下降,对剪切速率的变化不敏感;共混体系呈一定界面相互作用的两相体系,其相容性依赖于组成比例。当PSF/PPS为3/7(质量比,下同)时共混体系相容性最好,相应地表现出最好的综合力学性能,尤其是冲击强度比PPS提高了64%。 相似文献
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共混改性聚苯硫醚纤维光稳定性的研究 总被引:1,自引:1,他引:0
采用质量分数1.5%的光稳定剂苯并三唑、或纳米二氧化钛或二者复配体系与聚苯硫醚(PPS)共混熔融纺丝,制备了共混改性PPS纤维。研究了光稳定剂对共混改性PPS纤维热性能、力学性能及光稳定性能的影响。结果表明:苯并三唑、纳米二氧化钛的加入,对PPS纤维的热稳定性没有影响,对PPS结晶具有促进作用,能显著提高PPS纤维的力学性能,降低PPS纤维颜色变化程度,抑制发色基团的产生,其中苯并三唑含量越高,纤维颜色变化程度越小,纳米二氧化钛含量越高,纤维力学性能增加越大。 相似文献
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在聚苯硫醚(PPS)树脂基体中引入聚酰胺66(PA66),随着PA66含量增加,PPS/PA66共混物的拉伸强度和弯曲强度逐渐下降,结合PPS/PA66共混物的相形貌分析,提出了通过玻璃纤维(GF)的引入,制备具有互锁结构的PPS/PA66/GF三元体系复合材料,达到同时提高复合材料的强度、刚度及韧性的目的。分别考察了短玻璃纤维(SGF)和中长玻璃纤维(LGF)增强PPS/PA66的综合性能。结果表明,GF的引入显著提高了共混物的力学性能,同时,PPS/PA66/SGF和PPS/PA66/LGF复合材料的扫描电子显微镜和动态力学性能分析都表明共混物内部形成了一个高度互锁的结构。 相似文献
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Poly(phenylene sulfide) (PPS) is a high-performance super-engineering plastic, but is brittle. In this study, super-tough PPS-based blends were successfully generated by melt blending PPS with poly(ethylene-ran-methacrylate-ran-glycidyl methacrylate) (EGMA) and poly(phenylsulfone) (PPSU) at (56/14/30) PPS/EGMA/PPSU composition, and their toughening mechanisms were investigated in detail. It was demonstrated the interfacial reaction between PPS and EGMA and partial miscibility between PPS and PPSU, both play important synergistic roles on the toughening. The interfacial reaction between PPS and EGMA contributes to the reduction of the PPSU domain size by the increased viscosity of the PPS matrix containing EGMA, and the increased mobility of EGMA chains by negative pressure effect. The partial miscibility between PPS and PPSU contributes to the increased interfacial adhesion between PPS and PPSU, resulting in effective propagation of the impact to the domains, and the increased mobility of not only PPSU chains but also PPS chains, causing a reduction in crystallization. 相似文献
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The crystallization behavior of neat PPS and PPS in blends with PMR‐POI prepared by melt mixing were investigated by differential scanning calorimetry (DSC). It was found that POI was an effective nucleation agent of the crystallization for PPS. The enthalpy of crystallization of PPS in the blends increased compared with that of neat PPS. During isothermal crystallization from melt, the dependence of relative degree of crystallinity on time was described by the Avrami equation. It has been shown that the addition of POI causes an increase in the overall crystallization rate of PPS; it also changed the mechanism of nucleation of the PHB crystals from homogeneous nucleation to heterogeneous nucleation. The equilibrium melting temperature of PPS and PPS/POI blends were determined. The analysis of kinetic data according to nucleation theories shows that the increase in crystallization rate of PPS in the composite is due to the decrease in surface energy of the extremity surface. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 436–442, 2002 相似文献
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本文采用粉末浸渍工艺制得连续玄武岩纤维和不锈钢纤维增强聚苯硫醚预浸料,预浸料的编织物经层压成型制备了聚苯硫醚复合材料,对复合材料的力学和电磁屏蔽性能进行了研究。结果表明:不锈钢纤维/聚苯硫醚预浸料与玄武岩纤维/聚苯硫醚预浸料层压所形成的复合材料其力学性能和电磁屏蔽性能均优于铝箔与玄武岩纤维/聚苯硫醚预浸料层压所形成的复合材料;当电磁波频率小于200 MHz时,复合材料的电磁屏蔽效能较高,不锈钢纤维/聚苯硫醚预浸料中不锈钢纤维质量分数(含量)为30%时,复合材料的电磁屏蔽效果达到较高值,当电磁波频率在200~1 500 MHz范围内,材料的屏蔽效能在20~30dB间波动。 相似文献