共查询到19条相似文献,搜索用时 75 毫秒
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硫化胶粉/PP共混材料的研究 总被引:10,自引:2,他引:10
研究了硫化胶粉/PP共混体系的力学性能,流动性能和热变形温度等。结果表明,利用硫化胶粉可以明显改善PP的冲击性能,而且胶粉粒径越小,改善的效果越显著,但共混体系的拉伸强度有所下降。胶粉含量在5%-15%时,共混体系的综合性能较好。 相似文献
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高密度聚乙烯/废橡胶胶粉共混物的改性研究 总被引:4,自引:1,他引:4
采用新的改性体系三元乙丙橡胶(EPDM)、硅油、过氧化二异丙苯(DCP)对高密度聚乙烯/胶粉(HDPE/SRP)共混物进行了研究,探讨了各改性剂用量对共混物力学性能的影响。结果表明:EPDM用量为10-15份,硅油用量为4份,DCP用量为0.2份,共混物具有较好的力学性能。与未改性HDPE/SRP共混物相比,改性后共混物(EPDM为10份,硅油为4份,DCP为0.2份)的冲击强度和断裂伸长率分别可以大幅度提高,并且胶粉含量越少,提高的幅度越明显。扫描电镜观察结果表明:改性共混物中弹性体的分散和包覆结构是韧性提高的主要原因。 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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氯化改性胶粉/PVC共混物性能研究 总被引:1,自引:1,他引:1
对废轮胎胶粉进行氯化改性,考察溶剂、反应时间、反应温度和氯气流速对氯化效果的影响,研究氯化改性胶粉/PVC共混物的物理性能和微观结构.结果表明,采用水相氯化法、反应温度为70℃及氯气流速为0.6 g·min-1时,通过控制反应时间可以得到不同氯含量的氯化改性胶粉.与未改性胶粉相比,氯化改性胶粉的高温稳定性变差,与水的表面接触角减小,极性增大;与PVC共混物的物理性能明显提高.SEM分析证明,氯化改性胶粉与PVC界面比较模糊,无明显缝隙,两者相容性好. 相似文献
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轮胎胶粉/LLDPE共混材料性能的研究 总被引:4,自引:0,他引:4
研究了轮胎胶粉/线性低密度聚乙烯(LLDPE)共混材料的性能。结果表明,加入适量的未经处理的胶粉可降低共混体的硬度,但同时也降低了材料的拉伸强度。用质量分数为3%的硼酸酯偶联剂SB-182处理胶粉,当胶粉添加量为10%时,可使材料的断裂伸长率提高80%,用2%的SB-J处理胶粉,可使材料的拉伸强度与断裂伸长率同时有所改善。 相似文献
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研究废旧轮胎胶粉( GTR)粒径和用量以及相容剂种类和用量对GTR/聚苯乙烯(PS)共混物性能的影响.结果表明:GTR可以改善PS的脆性,提高PS的抗冲击性能,但会使拉伸性能降低;GTR粒径越小,GTR/PS共混物的抗冲击性能越好;相容剂乙烯-丙烯酸酯-甲基丙烯酸缩水甘油酯和苯乙烯-丁二烯-苯乙烯嵌段共聚物( SBS)能大幅改善GTR/PS共混物的抗冲击性能,相容剂马来酸酐接枝聚丙烯以及甲基丙烯酸甲酯、丁二烯和苯乙烯的三元共聚物对GTR/PS共混物的抗冲击性能改善不大;GTR(粒径为75 μm)/PS/相容剂SBS用量比为40/100/10时,GTR/PS共混物的综合性能较好,缺口冲击强度达到4.87 kJ·m-2. 相似文献
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往含少量促进剂2MT和高活性炭黑П234-0的丁二烯-丙烯腈-异丙基羧基甲基丙烯酸甲酯共聚物(БНЭФ-26-И)胶料中加入少量氯醚橡胶共聚物(СКЭХГ-С)(5~20份)、硫化镁(0.5~2.5份)、高活性炭黑(2.5~12.5份),可制得加工性能及综合性能优异的胶料及其硫化胶。用该并用胶生产橡胶制品,可扩大其应用领域及延长制品的使用寿命。 相似文献
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Yinling Wang Yuan Hu Xinglong Gong Wanquan Jiang Peiqiang Zhang Zuyao Chen 《应用聚合物科学杂志》2007,103(5):3143-3149
Magnetorheological (MR) elastomers, which are mainly composed of magnetic particles and elastic polymer, are a new kind of smart materials whose modulus can be controlled by changing the strength of magnetic fields. In this article, MR elastomers based on immiscible silicon rubber/polystyrene (SR/PS) blend matrix were fabricated successfully via cosolvent method and the MR effect, electric and mechanical properties, and the microstructures of the corresponding materials were studied. SEM studies showed that the dispersion of iron particles in blend matrix were different from that in single polymer, which could be further proved by the different electric conductivity. The MR effect of MR elastomers based on blend matrix varied with the different ratios of SR and PS, which was discussed in detail from the special dispersion of iron particles and of zero‐modulus of MR elastomers. In addition, the MR elastomers based on SR/PS blend matrix had enhanced mechanical properties, which made them more hopeful to be applied in practice. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3143–3149, 2007 相似文献
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Natural rubber/polystyrene (NR/PS) blend films with weight ratios of 70/30, 60/40, and 50/50 were prepared using polystyrene grafted natural rubber copolymers (NR‐g‐PS) as the compatibilizer. Copolymers with molar ratios of 90/10, 80/20, and 70/30 were synthesized via emulsion copolymerization using tert‐butyl hydroperoxide/tetraethylene pentamine as an initiator. The copolymers were subsequently added into the blends at 0, 5, 10, 15, 20, 25, and 30 phr. The mixtures were cast into films by the solution‐casting method using toluene as the casting solvent. Mechanical and morphological properties of the prepared films were investigated. The film prepared from 80/20 NR‐g‐PS showed higher tensile and tear strength, as well as finer domain size of the dispersed phase, than those prepared from 90/10 and 70/30 NR‐g‐PS. However, the mechanical properties of the films were decreased at high loading of the copolymers. In addition, themogravimetric analysis revealed that weight loss was decreased upon introduction of the compatibilizer. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 826–831, 2005 相似文献