共查询到18条相似文献,搜索用时 109 毫秒
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聚丙烯固相接枝物增容PA6/PS共混体系 总被引:3,自引:0,他引:3
采用FTIR和WAXD研究了聚丙烯固相接枝苯乙烯(St)和马来酸酐(MAH)的结构,并研究了它对聚酰胺6/聚苯乙烯(PA6/PS)共混体系力学性能的影响及其非等温结晶动力学,研究结果表明,PP上可固相接枝St,MAH;gPP(PP接枝St和MAH双组分接枝物)增容PA6/PS的非等温结晶动力学与MandelKern理论基本吻合。 相似文献
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PS-g-PA6制备及在PS/PA6体系的相容作用 总被引:1,自引:0,他引:1
利用苯乙烯(St)和3-异丙烯基-α,α-二甲基苄基异氰酸酯(TMI)的共聚物为起始剂,在催化剂己内酰胺钠(NaCL)存在下,TMI中异氰酸官能团引发己内酰胺(CL)聚合,合成了接枝共聚物PS-g-PA6。进-步研究了相容剂PS-g-PA6存在下聚苯乙烯(PS)和尼龙6(PA6)共混体系的形态结构。结果表明:不论母体PS和分散相PA6的比例如何,只需少量的PS-g-PA6就可大幅减小分散相PA6的粒径。对于PS/PA6(90/10)共混体系,仅需加入1.50%(质量分数)的PS-g-PA6,分散相的粒径从没有加PS-g-PA6的2.5μm减小至0.3μm。 相似文献
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HDPE-g-MAH对PA6/UHMWPE共混合金力学性能及结晶行为的影响 总被引:2,自引:0,他引:2
采用HDPE-g-MAH作为相容剂来增容PA6/UHMWPE共混合金。结果表明:在熔融共混过程中HDPE-g-MAH和PA6发生化学反应,生成的接枝聚合物对PA6/UHMWPE产生增容作用。加入HDPE-g-MAH共混体系的界面形态和力学性能均有较大的改善,吸水率也有所下降。通过Mo-lau实验I、R、SEM观察来研究其在熔融共混过程对PA6/UHMWPE的反应增容作用。采用DSC实验对PA6/UHMWPE共混合金进行了结晶性能测试,随着HDPE-g-MAH用量的增加,UHMWPE结晶度增加,而PA6的结晶度降低。 相似文献
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共混工艺对PP/PA6/纳米SiO2复合材料力学性能的影响 总被引:1,自引:0,他引:1
以聚丙烯(PP)作为基体,经表面处理过的纳米二氧化硅(nano-SiO2)和刚性聚合物尼龙6(PA6)作为改性剂,添加5%的接枝POE作增容剂,采用不同的共混工艺制备PP/PA6/纳米SiO2复合材料。研究了熔融共混挤出次数和共混方法对PP/PA6/纳米SiO2复合材料力学性能的影响,借助扫描电子显微镜从断面形貌上分析了影响复合材料力学性能的因素。结果表明:采用二次挤出熔融共混比一次挤出熔融共混制得的复合材料力学性能要好;采用PP与纳米SiO2先熔融共混挤出制得粒料,再用PA6、接枝POE与粒料熔融共混挤出的共混方法制得的复合材料综合力学性能最优。 相似文献
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介绍了PA6/ABS合金在国内外发展状况、当前ABS/PA6合金技术发展趋势、相容剂种类及其各组成对PA6/ABS合金性能的影响。 相似文献
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In situ polymerization and in situ compatibilization was adopted for preparation of ternary PA6/PS‐g‐PA6/PS blends by means of successive polymerization of styrene, with TMI and ε‐caprolactam, via free radical copolymerization and anionic ring‐opening polymerization, respectively. Copolymer poly(St‐g‐TMI), the chain of which bears isocyanate (? NCO), acts as a macroactivator to initiate PA6 chain growth from the PS chain and graft copolymer of PS‐g‐PA6 and pure PA6 form, simultaneously. The effect of the macroactivator poly(St‐g‐TMI) on the phase morphology was investigated in detail, using scanning electron microscopy. In case of blends with higher content of PS‐g‐PA6 copolymer, copolymer nanoparticles coexisting with the PS formed the matrix, in which PA6 microspheres were dispersed evenly as minor phase. The content of the compositions (homopolystyrene, homopolyamide 6, and PS‐g‐PA6) of the blends were determined by selective solvent extraction technique. The mechanical properties of PA6/PS‐g‐PA6/PS blends were better than that of PA6/PS blends. Especially for the blends T10 with lower PS‐g‐PA6 copolymer content, both the flexural strength and flexural modulus showed significantly improving because of the improved interfacial adhesion between PS and PA6. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007 相似文献
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将自制的PP—g—MAH(聚丙烯接枝马来酸酐)及PP—g—GMA(聚丙烯接枝甲基丙烯酸缩水甘油酯)作为PP/PA6共混体系的相容剂,研究了加入聚丙烯接枝物后PP,PA6塑料合金的各种力学性能及形态结构。结果表明:在PP/PA6共混物中加入PP—g—MAH后,共混物的力学性能得到明显的提高.添加PP—g—MAH对不同比例PP/PA6共混物力学性能的影响不同;用PP—g—MAH和PP—g—GMA两种接枝物共同作为相容剂加入到PP/PA6共混物中比单独使用一种的效果要好。共混物的SEM照片表明。PP—g—MAH是PP/PA6共混物的有效增容剂。 相似文献
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Summary A novel approach of in situ polymerization and in situ compatibilization was adopted to prepare the nano-blend of poly (2,6-dimethyl-1,4-phenylene oxide) (PPO), polystyrene (PS) and polyamide 6 (PA6). Anionic ring-opening polymerization of -caprolactam was carried out in the presence of PPO and PS. And PS, the chain of which bore methylmethacrylate (MMA) groups, acted as macroactivator to initiate PA6 chain growth from the PS chain and formed a graft copolymer of PS and PA6 and pure PA6 simultaneously. Thus the nano-structured PA6 dispersed phase in the PPO matrix could be achieved. 相似文献
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以POE-g-MAH为增容剂,应用双螺杆挤出机制备通过熔融共混法制备了PA6/ABS合金,研究了ABS树脂的用量对合金的力学性能的影响。结果表明:在POE-g-MAH存在的条件下,随着ABS用量增大,共混物的拉伸强度逐渐增大,简支梁缺口冲击强度则逐渐减小,而无缺口冲击强度先减小后增大。在混和体系中,POE-g-MAH具有增容和增韧的双重作用。 相似文献
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In this paper the crystallization behavior of PA6, dispersed as droplets in various immiscible amorphous polymer matrices, is reported. PA6 was melt-mixed at various compositions with PS, (PPE/PS 50/50 wt/wt) and PPE using twin-screw extrusion. The phase morphologies of the obtained blends were analysed using SEM, etching experiments and image analysis. The crystallization behavior of PA6 was investigated by dynamic and isothermal DSC experiments. In case PA6 is dispersed as droplets, fractionated crystallization behavior occurs, characterized by several crystallization events at different, lowered crystallization temperatures. It is found to depend on the blend morphology (size of the droplets) and the thermal history of the samples (heterogeneous nucleation density). The PA6 droplet size distribution is shown to strongly influence the crystallization behavior of the droplets. Vitrification of the matrix appears to cause nucleation in the droplets at the interface. Decreasing the PA6 droplet size results in slower overall crystallization rates. 相似文献
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PA6/ABS合金的研制 总被引:3,自引:0,他引:3
应用Brabender挤出机制备ABS接枝物ABS g MAH,讨论了反应过程中温度、转速、单体MAH和引发剂DCP用量对接枝率的影响,并研究了接枝物对PA6/ABS合金的增容作用,用扫描电镜观察了分散相的微观形态。实验表明,在合适的温度下,转速为30r/min、DCP用量为1%、MAH用量为5%时,ABS g MAH的接枝率可达2 3%;PA6/ABS/ABS g MAH共混物配比为90∶8∶15时,合金的冲击韧性有较大提高,其它性能也有所改善。 相似文献