共查询到19条相似文献,搜索用时 93 毫秒
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聚苯乙烯增韧用橡胶的发展 总被引:7,自引:2,他引:7
详细叙述了聚苯乙烯的增韧方法及所用胶种,采用特殊结构的低顺式聚丁二烯橡胶和低粘度、无凝胶的高顺式BR增韧PS可制得性能优异,且各种物性的高抗冲PS。指出,高顺式BR有可能成为最理想的增韧胶种。 相似文献
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稀土掺杂改性聚苯乙烯研究 总被引:4,自引:0,他引:4
以适当的有机稀土化合物作为掺杂剂制得掺稀土聚苯乙烯,用红外光谱、紫外光谱、X射线光电子能谱、热分析、GPC对其结构和性质进行表征,并测试部分力学性能,表明掺稀土聚苯乙烯比对照的聚苯乙烯在热稳定性、冲击强度、弯曲强度上有明显的提高。 相似文献
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张雪娇 《化学工业与工程技术》2007,28(5):44-46
讨论了刚性无机粒子在增韧聚苯乙烯塑料中的增韧机理、影响因素及其应用。通过讨论得出结论,无机纳米粒子的出现,将会大大促进无机刚性粒子在塑料增韧方面的应用。 相似文献
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采用接枝(乙烯/丙烯/二烯)共聚物(EPDM)、K胶、(苯乙烯/丁二烯/苯乙烯)共聚物(SBS)和粉末丁腈橡胶(NBR)为高分子材料增韧剂,十溴联苯醚和三氧化二锑为阻燃剂,高抗冲聚苯乙烯(HIPS)为基体树脂通过共混、挤出过程制得增韧阻燃HIPS复合材料。对该复合材料的力学性能、阻燃性能进行测试,分析了该复合材料的微观结构,并讨论了复合材料的增韧机理。结果表明,SBS比其它3种增韧剂的增韧作用明显,并有良好的阻燃效果。 相似文献
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讨论了不同第三组分和不同种聚乙烯对以聚苯乙烯为基质的PS/PE共混体系结构和性能的影响,发现苯乙烯-丁二烯-苯乙烯嵌段共聚物和苯乙烯-氢化丁二烯-苯乙烯嵌段共聚物作为第三组分对PS/PE共混体系均具有增容作用,用SBS的效果比SEBS好,而SBS的结构对增韧效果的影响不大。在SBS存在下,LLDPE对PS增韧效果最好,HDPE次之,LDPE最差。 相似文献
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The optimum conditions for preparing poly(styrene‐co‐divinylbenzene) were determined and the variation of the mechanical properties of the networks with the crosslinking density was evaluated. The molecular weight between crosslinks was in the 800–12,000 range. The flexural modulus and flexural strength were 5000 and 110 MPa, respectively, for the more crosslinked materials. When liquid rubber (hydroxyl‐terminated polybutadiene) was incorporated into the glassy matrix, these values dropped to 2500 and 70 MPa, respectively, but the impact resistance increased to 70 J/m. These values were comparable to some commercial grade high impact polystyrene resins. The particle size of the dispersed rubber phase was on the nanometer scale, and attempts to increase its dimensions should provide further improvement in the impact properties. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2098–2105, 2001 相似文献
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文章概述了有关苯乙烯聚合物橡胶增韧的研究结果,通过改变橡胶种类、调整原料配方、采用高低顺橡胶的混用及优化工艺操作,可以得到综合性能优异的高抗冲聚苯乙烯产品,取得较好的经济效益。 相似文献
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Xiaoting Fu Mingming Ding Changyu Tang Bo Li Zeyong Zhao Dai‐Qiang Chen Qin Zhang Qiang Fu Han Long Touwen Tan 《应用聚合物科学杂志》2008,109(6):3725-3732
The recycled polystyrene (rPS) was toughened with ethylene‐octylene copolymer thermoplastic elastomer (POE) and high‐density polyethylene (HDPE) with various melt flow index (MFI), compatibilized by styrene‐butadiene‐styrene copolymer (SBS) to enhance the toughness of rPS for use as TV backset. The rPS/POE binary blends exhibited an increased impact strength with 5–10 wt % POE content followed by a decrease with the POE content up to 20 wt %, which could be due to poor compatibility between POE and rPS. For rPS/POE/SBS ternary blends with 20 wt % of POE content, the impact strength increased dramatically and a sharp brittle‐ductile transition was observed as the SBS content was around 3–5 wt %. Rheological study indicated a possible formation of network structure by adding of SBS, which could be a new mechanism for rPS toughening. In rPS/POE/HDPE/SBS (70/20/5/5) quaternary blends, a fibril‐like structure was observed as the molecular weight of HDPE was higher (with lower MFI). The presence of HDPE fibers in the blends could not enhance the network structure, but could stop the crack propagation during fracture process, resulting in a further increase of the toughness. The prepared quaternary blend showed an impact strength of 9.3 kJ/m2 and a tensile strength of 25 MPa, which can be well used for TV backset to substitute HIPS because this system is economical and environmental friendly. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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综述了聚氯乙烯、聚丙烯、聚苯乙烯等常用建筑塑料的增韧改性研究进展,讨论了橡胶和热塑性弹性体共混增韧、刚性无机粒子增韧以及共聚、交联等化学增韧的方法和特点。 相似文献
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双马来酰亚胺树脂的增韧改性研究 总被引:1,自引:0,他引:1
综述了目前双马来酰亚胺树脂增韧改性的主要方法,并对其工艺改性提出建议。增韧改性主要通过分子结构的改变或形态控制来实现。这些方法有原位聚合法增韧改性、二元胺扩链增韧改性、高性能热塑性树脂增韧改性、烯丙基化合物增韧改性、BMI内扩链法增韧改性和液晶增韧改性等方法。并对我国双马来酰亚胺树脂改性的研究现状及其发展趋势作了探讨。 相似文献