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三元共聚尼龙/聚氯乙烯/丁腈橡胶三元共混弹性体研究 总被引:2,自引:3,他引:2
选择三元共聚尼龙(PA),聚氯乙烯(PVC)和丁腈橡胶(NBR)为主体材料,采用高温机械共混,化学交联工艺制得了PA/PVC/NBR三元共混弹性体,探讨了PA/NBR,POM/NBR,PVC/NBR,HMWPVC/NBR三元共混体系性能,重点讨论了PA/PVC/NBR共混比,不同硫化体系,有机过氧物DCP用量等因素对PA/PVC/NBR三元共混弹性体性能的影响,实验结果表明:选择适宜配方制得力学性能和耐油耐溶剂性能较好的PA/PVC/NBR三元共混弹性体,扫描电镜的实验结果证实m(PA):m(PVC):m(NBR)=10:30:60和m(PA):m(PVC):m(NBR)=30:10:60两个体系的三元共混弹性体均具有较好的相容性,且前者的相容性更好。 相似文献
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采用动态硫化法制备了丁腈橡胶/三元尼龙/二元尼龙三元共混型热塑性弹性体.用TEM,DSC对其相态进行了研究.实验发现,二元尼龙的加入可显著提高该热塑性弹性体的耐溶剂性,而且其物理机械性能较佳. 相似文献
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AS/NBR/HSB三元共混体系的动态硫化 总被引:1,自引:0,他引:1
采用动态硫化方法制备了丙烯腈-丁二烯共聚物/丁腈橡胶/高苯乙烯树脂(AS/NBR/HSB)三元共混热塑性弹性体,研究了NBR中丙烯腈质量分数,橡塑比和硫化剂对共混体系性能的影响。结果表明,动态硫化显著提高了共混材料的拉伸强度和扯断伸长率,酚醛树脂是AS/NBR,HSB共混体系比较理想的动态硫化交联剂;采用HSB,NBR,AS三元共混,共混材料的拉伸强度和扯断伸长率得到良好的平衡;差示扫描量热分析表明,该三元共混材料具有NBR和AS两相的玻璃化转变温度,说明该体系是典型的不相容体系。 相似文献
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在选择三元共聚尼龙(PA)、聚氯乙烯(PVC)、丁腈橡胶(NBR)为主体材料,制备PA/PVC/NBR(10/30/60)三元共混弹性体的工作基础上,进一步探讨了填料品种和用量,共混温度,加料顺序等因素PA/PVC/NBR三元共混弹性体的影响。试验结果表明:在PA/PVC/NBR(10/30/60)共混体系中,补强型填料的补强效果优于非补强型的填料,6种填料补强效果依次是:快压出炭黑>半补强炭黑>白炭黑>活性重质,CaCO3>陶土>滑石粉,快压出炭黑的适宜用量是20-50份。在制备PA/PVC/NBR三元共混物时,适宜的共混温度是122-140℃,并且采用二段法混工艺制得的共混物性能优于采用一段法共混工艺。 相似文献
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采用动态硫化法制备了丁腈橡胶/三元尼龙/二元尼龙三元共混型热塑性弹性体。用TEM,DSC对其相态进行了研究。实验发现,二元尼龙的加入可显著提高该热塑性弹性体的耐溶剂性,而且其物理机械性能较佳。 相似文献
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PVC/POM/NBR三元共混弹性体的研究 总被引:2,自引:0,他引:2
采用高温机械共混、化学交联工艺制备PVC/POM/NBR三元共混弹性体。重点讨论了PVC/POM/NBR共混比、PVC树脂的分子量、NBR橡胶的丙烯腈含量、硫化体系等因素对共混弹性体性能的影响。结果表明,PVC/POM/NBR(20/10/70)三元共混弹性体具有优异的物理机械性能和耐油耐溶剂性能。用动态粘弹谱仪和扫描电子显微镜等现代分析技术研究其微观结构,结果显示PVC/POM/NBR(20/10/70)三元共混弹性体的tgδ-T谱上只出一个峰值,其对应的玻璃化转变温度为 3.7℃,表现出较好的相容性。 相似文献
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Dynamically vulcanized blends of nylon, styrene–acrylonitrile copolymer (SAN), and nitrile–butadiene rubber (NBR) were examined for mechanical properties, Shore D hardness, Vicat softening temperature, impact process, and phase morphology. The effect of a curing system such as phenolic formaldehyde resins (PF), dicumylperoxide (DCP), and a sulfur system on the mechanical properties of the nylon/SAN/NBR blends was studied, and dynamic vulcanization with a PF system was found to lead to outstanding toughness of the blends. The effect of PF content on the mechanical properties, Shore D hardness, and heat resistance of the nylon/SAN/NBR blends was also investigated. With increasing PF content the notched‐impact strength and Vicat softening temperature (VST) of the nylon/SAN/NBR (50/25/25) blends evidently improved, but tensile strength and Shore D hardness of the blends changed slightly. It can be concluded that the nylon/SAN/NBR (50/25/25) blends dynamically vulcanized by high‐content PF can attain excellent comprehensive mechanical properties, especially supertoughness, at room temperature. SEM was used to investigate the effect of dynamic vulcanization on disperse‐phase particle size, particle size distribution, and phase morphology. It was obvious that disperse‐phase particle size decreased with an increasing PF content. Thermal behavior and miscibility of dynamically vulcanized nylon/SAN/NBR with PF were investigated by DMTA. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2057–2062, 2003 相似文献
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Miscibility and crystallization of poly-p-phenylene terephthalamide (PPTA)/nylon 6 and nylon 66 composites prepared by coagulation of isotropic ternary sulfuric acid solutions were studied. The apparent crystallinity of nylon 6 and nylon 66 in molecular composites was investigated by differential scanning calorimetry and Fourier transform infrared spectroscopy. The solvation of nylon 6 crystals in PPTA matrix was observed when the PPTA content exceeds 70 wt%. Cross-hydrogen bonding seems to be responsible for the virtual disappearance of nylon 6 crystals. Specific interaction between PPTA and nylon 6 macromolecules and phase separation during thermal treatment has been discussed. 相似文献
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采用动态硫化方法制备高聚合度聚氯乙烯(HPVC)/SBR共混型热塑性弹性体,考察了单一组分相容剂「相容剂分别为NBR270、NBR P65、CPE和氢化苯乙烯-丁二烯、苯乙烯嵌段共聚物(SEBS)」、复合相容剂(SEBS/NBR和CPE/NBR)及交联程度对HPVC/SBR共混体系相容性的影响。结果表明,使用复合相容剂可明显改善HPVC/SBR共混物的性能;动态硫化在改善共混物力学性能方面起主要作 相似文献
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NBR/PVC热塑性弹性体耐热老化性能研究 总被引:2,自引:0,他引:2
考察了硫化体系、PVC聚合度、DOP用量、抗氧剂种类及用量对丁腈橡胶/聚氯乙烯(NBR/PVC)热塑性弹性体(TPE)的耐热老化性能的影响。试验结果表明:NBR/PVC:的质量比为70:30时,酚醛树脂硫化体系制备的TPE的耐热老化性能最好;增加PV(:的聚合度,TPE的耐热老化性能提高;DOP用量越大。TPE的耐热老化性能越差;抗氧剂2246对TPE的耐热老化性能最好,其最佳用量为2.0份。 相似文献
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Poly(acrylic acid)/nylon6 and polystyrene/nylon6 blends were prepared using supercritical CO2 as substrate-swelling agent and monomer/initiator carrier. Both supercritical CO2/nylon6 binary system and SC CO2/monomer/nylon6 ternary system were studied. Virgin nylon6 and synthesized blends were characterized through differential scanning calorimetry, infrared spectroscopy, and polarizing microscopy. Supercritical CO2-induced crystallization was found in modified nylon6. 相似文献
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采用动态硫化法制备了丁腈橡胶/尼龙6热塑性弹性体(NBR/PA 6 TPV),考察了硫化体系、羧基丁腈橡胶(XNBR)以及增塑剂高密度氧化聚乙烯蜡(AC-316 A)和正丁基苯磺酰胺(BBSA)对TPV硫化特性、力学性能和微观形貌的影响。结果表明,以促进剂HVA-2/促进剂DM为硫化体系,动态硫化过程体系黏度的变化比以酚醛树脂/SnCl2为硫化体系时更平稳;但用后者制备TPV,其撕裂强度和扯断伸长率等力学性能更优,PA 6的结晶度更低。XNBR能对NBR和PA 6起到增容作用,当XNBR与NBR的质量比为10/90时,TPV的力学性能最好,NBR在PA 6中分散得最均匀。AC-316 A和BBSA都能对TPV起到增塑作用,随其用量的增加,体系黏度降低。 相似文献