相容剂对PC／ABS合金性能的影响

制备了不同配比的PC／ABS合金样品，研究了三种相容剂对PC／ABS合金的力学性能及应力开裂性能的影响。结果表明，苯乙烯马来酸酐共聚物(相容剂A)、马来酸酐接枝ABS(相容剂B)、马来酸酐接枝线形低密度聚乙烯(相容剂C)均可以提高共混体系中两组分的相容性。相容剂A、B、C的最佳用量分别为3％、5％和4％。     

高性能PA6/ABS合金的研制

分别以接枝ABS、苯乙烯-马来酸酐接枝物（SMA）和苯基马来酰亚胺共聚物为相容剂,考察了它们对PA6/ABS共混体系相容性和力学性能的影响。并研究了PA6/ABS共混体系中PA6、ABS树脂的选择对共混物冲击韧性的影响。研究表明,接枝ABS、SMA和苯基马来酰亚胺共聚物都是PA6/ABS共混体系的有效增容剂,能显著改善PA6/ABS共混物的相容性并提高共混物的机械力学性能。选用高粘度的PA6树脂有利于提高共混体系的冲击韧性,提高高胶含量ABS用量有助于获得高低温冲击性能优异的PA6/ABS合金材料。     

相容剂对PC/ABS共混物性能的影响

本文分别研究了马来酸酐接枝ABS(ABS-g-MAH)与甲基丙烯酸甲酯/丁二烯/苯乙烯共聚物(MBS)作为相容剂对PC/ABS共混体系相容性、力学性能、形态结构的影响.研究结果表明:当相容剂MBS加入PC/ABS共混体系中后,不仅能够显著改善PC/ABS共混物的相容性,明显降低分散相的粒径,而且能够使PC/ABS共混物在保持较高的拉伸强度的同时,大幅度地提高共混物的缺口冲击强度和断裂伸长率;而相容剂ABS-g-MAH的加入对共混体系的缺口冲击强度的改善不明显,但其断裂伸长率增幅较大.     

液晶离聚物在ABS/PBT共混体系中的增容研究

合成了一种含有磺酸基的液晶离聚物（LCI）,并研究了LCI作为相容剂对丙烯腈-丁二烯-苯乙烯三元共聚物/聚对苯二甲酸丁二醇酯（ABS/PBT）共混体系力学性能的影响。采用扫描电镜（SEM）、差示扫描量热仪（DSC）和热失重（TGA）分析对ABS/PBT/LCI共混物的热性能、微观形态和相容性进行了研究。研究结果表明LCI的加入,改善了二者的相容性,从而提高了共混物的拉伸强度、断裂伸长率以及缺口冲击强度。     

阻燃PC／ABS共混体系的动态力学分析

通过熔融共混法制备了阻燃PC／ABS复合材料,分析了其动态力学性能,探讨不同相容剂、不同ABS组份等因素对复合材料的储存模量（E′）、损耗模量（E″）、损耗因子（tanδ）等动态力学参数的影响。结果发现使用丙烯酸树脂和苯乙烯马来酸酐无规共聚物组成的复合相容剂能够较好地改善阻燃PC／ABS的相容性,在玻璃化温度附近E′和E″适中;材料有着良好的刚性和韧性,综合力学性能优良。研究结果可为进一步优化阻燃PC／ABS产品配方提供依据。     

PBT/ABS合金增容体系的研究

研究了3种不同结构的相容剂对聚对苯二甲酸丁二醇酯/丙烯腈-丁二烯-苯乙烯三元共聚物（PBT/ABS）共混合金的力学性能和熔体流动速率的影响,并采用扫描电镜和差示扫描量热仪对PBT/ABS共混合金的相界面、相容性及结晶度进行了表征。结果表明,带有环氧官能团的相容剂KS-TD-00202能有效地提高PBT/ABS共混合金的相容性,在提高共混合金缺口冲击强度的同时,不降低拉伸强度和弯曲强度,也不影响共混合金的加工流动性,同时提高了PBT在共混合金中的结晶度。     

回收PC/回收ABS共混体系的性能与结构

利用叶片挤出机制备回收PC/回收ABS共混材料,研究叶片挤出机的加工特性对共混体系的作用,分析了苯乙烯/马来酸酐共聚物(SMA-700)、苯乙烯/丙烯腈/马来酸酐三元共聚物(SMA-800)以及ABS接枝马来酸酐(ABS-g-MAH)这3种相容剂对共混物的力学性能、耐热性、熔体指数及形态结构的影响。结果表明:叶片挤出机能有效促进回收ABS相在回收PC基体中的细化分散,适当用量的相容剂能有效提高共混体系的相容性,增强界面粘结力,SMA-700、SMA-800和ABS-g-MAH添加量分别为6%、2%、6%时共混体系的综合性能最佳。     

相容剂作用下超高相对分子质量聚乙烯增韧聚丙烯共混体系的研究

选取不同相容剂[马来酸酐接枝聚丙烯、线形低密度聚乙烯、丙烯腈-丁二烯-苯乙烯共聚物（ABS）]增容聚丙烯/超高相对分子质量聚乙烯（PP/PE-UHMW）共混体系,对比不同相容剂作用下PP/PE-UHMW共混体系力学性能的差异,并研究了PP/PE-UHMW/相容剂共混体系的亚微相结构,进一步探讨了微观结构对PP/PE-UHMW共混体系力学性能的影响。结果表明,添加相容剂的三元共混体系的结晶颗粒呈细化趋势;相容剂ABS的增容效果较好,PP/PE-UHMW/ABS共混体系的冲击强度最高可达113.31 J/m,并可保持PP原有的拉伸强度,但其断裂伸长率有较大幅度的降低。     

玻纤增强PBT／AS合金相容性的研究

通过熔融共混法制备了玻纤增强聚对苯二甲酸丁二醇酯（PBT）／丙烯腈-苯乙烯共聚物（As）合金。研究了不同相容剂对合金力学性能的影响,结果表明,加入相容剂能很好的提高合金的力学性能,其中加入4％自制相容剂对合金力学性能的提高最为明显。DSC分析表明,相容剂的加入能降低PBT的熔点,提高两相相容性。     

PVC／ABS共混体系的相容性与形态结构研究

采用种子乳液聚合技术在聚丁二烯（PB）乳胶粒子上接枝共聚苯乙烯（St）、α-甲基苯乙烯（α—MSt）和丙烯腈（AN）单体,合成了一系列不同AN结合量的ABS和α—MABS接枝共聚物。将其与聚氯乙烯（PVC）树脂熔融共混制得了PVC／AtkS共混物,利用扫描电镜（SEM）、透射电镜（TEM）和动态力学分析仪（DMA）对共混物的相容性和相结构进行了表征。结果发现,在PVC／ABS共混体系中,尽管改变接枝SAN共聚物的AN结合量,PVC和ABS接枝共聚物均为不相容体系;在ABS接枝共聚物中引入α-MSt后,当接枝SAN共聚物的AN结合量为18．7％～23．6％（质量分数）时,共混物在室温以上只存在1个tanδ峰,共混物成为相容体系,当AN结合量达到32．1％（质量分数）时,共混物成为部分相容体系。共混物的相区尺寸明显地依赖于接枝SAN共聚物中的AN结合量,与动态力学性能结果表现出良好的吻合。     

Influence of compatibilizer on mechanical,morphological and rheological properties of PP/ABS blends

The objective of this work was to study the compatibilizer effect on polypropylene (PP) and acrylonitrile butadiene styrene (ABS) blends. The blends were coextruded and injection molded in various ratios of ABS with and without compatibilizers. Universal testing machine was employed to analyze the tensile properties of basic PP/ABS binary blends. From the mechanical testing, the impact and tensile properties of PP/ABS blend were optimized at 80/20 weight ratio. Various compatibilizers such as PP-g-MAH, SEBS-g-MAH and ethylene α-olefin copolymer were used and their comparative performance on binary blend was enumerated. Hybrid compatibilization effect was also studied and reported. However, the addition of compatibilizers showed the maximum increase in impact strength attributed to rubber toughening effect of ABS. The effect of compatibilizers on morphological properties was examined using scanning electron microscopy (SEM). SEM micrographs depicted the more efficient dispersion of ABS particles in PP matrix with the addition of compatibilizers. Further, interparticle distance analysis was carried out to evaluate the rubber toughening effect. The ABS droplet size in compatibilized PP/ABS blend was brought to minimum of 3.2 μm from 9.9 μm with the addition of compatibilizers. The melt rheology of PP/ABS blend systems was investigated through parallel plate arrangement in frequency sweep. Linear viscoelastic properties like storage (G′) and loss (G″) modulus and complex viscosity (η*) have been reported with reference to the virgin materials. It is understood that the combination of compatibilizers (hybrid compatibilizer) had a considerable effect on the overall blend properties.     

Acrylonitrile–butadiene–styrene toughened nylon 6: The influences of compatibilizer on morphology and impact properties

Polymer alloys have been used as an alternative to obtain polymeric materials with unique physical properties. Generally, the polymer mixture is incompatible, which makes it necessary to use a compatibilizer to improve the interfacial adhesion. Nylon 6 (PA6) is an attractive polymer to use in engineering applications, but it has processing instability and relatively low notched impact strength. In this study, the acrylonitrile–butadiene–styrene (ABS) triblock copolymer was used as an impact modifier for PA6. Poly(methyl methacrylate‐co‐maleic anyhydride) (MMA‐MA) and poly(methyl methacrylate‐co‐glycidyl methacrylate) (MMA‐GMA) were used as compatibilizers for this blend. The morphology and impact strength of the blends were evaluated as a function of blend composition and the presence of compatibilizers. The blends compatibilized with maleated copolymer exhibited an impact strength up to 800 J/m and a morphology with ABS domains more efi8ciently dispersed. Moderate amounts of MA functionality in the compatibilizer (～5%) and small amounts of compatibilizer in the blend (～5%) appear sufficient to improve the impact properties and ABS dispersion. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 842–847, 2003     

PC/ABS共混体系的研究进展

综述了近年来国内外对PC/ABS共混体系结构与性能等方面的研究进展,其中包括相容性理论的研究、相容剂的选用及影响共混体系力学性能的因素:包括原料、组分的配比、成型条件等。并对共混体系的发展方向作了简要的分析,指出PC/ABS共混体系的开发研究在国内塑料合金的工业开发、应用中较为重要。     

Properties of acrylonitrile–butadiene–styrene/polycarbonate blends with styrene–butadiene–styrene block copolymer

The importance of alloys and blends has increased gradually in the polymer industry so that the plastics industry has moved toward complex systems. The main reasons for making polymer blends are the strengthening and the economic aspects of the resultant product. In this study, I attempted to improve compatibility in a polymer blend composed of two normally incompatible constituents, namely, acrylonitrile–butadiene–styrene (ABS) and polycarbonate (PC), through the addition of a compatibilizer. The compatibilizing agent, styrene–butadiene–styrene block copolymer (SBS), was added to the polymer blend in ratios of 1, 5, and 10% with a twin‐screw extruder. The morphology and the compatibility of the mixtures were examined by scanning electron microscopy and differential scanning calorimetry. Further, all three blends of ABS/PC/SBS were subjected to examination to obtain their yield and tensile strengths, elasticity modulus, percentage elongation, Izod impact strength, hardness, heat deflection temperature, Vicat softening point, and melt flow index. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2521–2527, 2004     

相容剂对PC/PLA共混体系性能的影响

研究了不同相容剂对聚碳酸酯/聚乳酸(PC/PLA)共混体系性能的影响,找出了增容效果明显的相容剂EMG,并进一步研究了EMG对PC/PLA共混体系相容性及力学性能的影响。结果表明:相容剂EMG的加入,促使共混体系中PC的玻璃化转变温度有所下降,PLA的玻璃化转变温度进一步提高,增强了两相间的界面黏结作用,改善了PC/PLA之间的相容性;EMG的加入,提高了PC/PLA共混物的力学性能,当相容剂质量分数为9%时,拉伸强度、断裂伸长率和缺口冲击强度均达到最大值。     

相容剂对rPET/mLLDPE共混物性能的影响

以回收聚对苯二甲酸乙二醇酯(rPET)为基体材料,茂金属线型低密度聚乙烯(mLLDPE)为共混材料,马来酸酐接枝线型低密度聚乙烯(LLDPE-g-MAH)、丙烯酸酯复合接枝苯乙烯-丁二烯弹性体为相容剂,制备了rPET/mLLDPE共混物。采用DSC和SEM分析了相容剂对共混物结晶性能及断面结构的影响,并检测了共混物的力学性能。结果表明:mLLDPE的加入使得rPET/mLLDPE共混物的熔体结晶峰向右移动,结晶温度提高了29.03℃;相容剂的加入使得共混物中rPET的玻璃化转变温度向低温方向移动,rPET与mLLDPE相容性增强;含3%LLDPE-g-MAH的rPET/mLLDPE共混物中,MAH基团与rPET中的羟基发生接枝反应,相界面模糊,rPET与mLLDPE界面黏结力增强,与纯rPET相比,其断裂伸长率提高了93.73%,缺口冲击强度提高了54.6%。     

增容剂对硅橡胶/热塑性聚氨酯热塑性硫化胶性能的影响

采用动态硫化法制备了甲基乙烯基硅橡胶（MVQ）/热塑性聚氨酯（TPU）共混型热塑性硫化胶（TPV）,考察了增容剂的种类及用量对TPV力学性能及加工流变性能的影响。结果表明,随着增容剂用量的增加,TPV的力学性能呈先上升后下降的趋势。相比于乙烯丙烯酸共聚物和乙烯与乙酸乙烯嵌段共聚物,用聚烯烃弹性体接枝马来酸酐（POE-g-MAH）作为增容剂时TPV的力学性能更为优异。3种增容剂均能提高TPV中MVQ相与TPU相的相容性。当POE-g-MAH的用量为6份时,TPV中MVQ相与TPU相的玻璃化转变温度靠近程度最大,两相界面较为模糊,增容效果最佳。     

相容剂及其在PC/ABS合金中的应用

采用水相悬浮聚合法合成了SAN-g-MAH、SAN-g-MMA、SAN-g-GMA3种相容剂,比较了3种相容剂对PC/ABS合金的增容效果,着重研究了工艺条件对接枝率的影响及相容剂用量对合金力学性能的影响。结果表明,相容剂的最大接枝率可达5.76%,添加相容剂后,PC/ABS合金的力学性能有明显提高,拉伸强度和缺口冲击强度分别可达61.91MPa和10.12kJ/m2。     

反应型相容剂对PC/ABS合金改性研究

对MAH、相容剂C官能化聚合物的作用机理以及作为反应型相容剂,对PC/ABS合金的相容改性和拉伸冲击性能进行了研究。结果表明,实验中应用的相容剂马来酸酐接枝聚丙烯、马来酸酐接枝ABS和新型反应性相容剂均可以提高PC/ABS共混体系的相容性,但是马来酸酐接枝聚丙烯和马来酸酐接枝ABS的加入都不同程度地降低了合金的拉伸强度,而新型反应性相容剂不仅具有更好的增韧效果,同时还有增强作用。这种新型增容剂用量少,成本可以接受,为PC/ABS合金的性能提高提供一个较好的选择。