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％。     

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.     

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。     

PC/改性ABS复合材料的制备与性能

在传统的丙烯腈-丁二烯-苯乙烯共聚物(ABS)乳液接枝聚合中加入甲基丙烯酸甲酯(MMA),制得了改性ABS,然后与聚碳酸酯(PC)共混挤出，制得了PC/改性ABS复合材料。研究了MMA用量对PC/改性ABS复合材料的熔体流动速率(MFR)、维卡软化温度、力学性能的影响。结果表明：随着MMA用量的增加，PC/改性ABS复合材料的MFR、拉伸强度、弯曲强度和缺口冲击强度均先升高后降低。当MMA质量分数为20%时，PC/改性ABS复合材料的拉伸强度和弯曲强度均达到最大，分别为48.9 MPa和63.2 MPa;当MMA质量分数为30%时，PC/改性ABS复合材料的缺口冲击强度为41.0 kJ/m²;当MMA质量分数不高于30%时，与PC/ABS复合材料相比，PC/改性ABS复合材料的维卡软化温度更高。     

ABS合金的改性研究

研究了(丙烯腈/丁二烯/苯乙烯)共聚物(ABS)接枝粉对ABS/聚氯乙烯(PVC)和ABS/聚碳酸酯(PC)合金冲击性能的影响,同时采用[丙烯腈/苯乙烯/N-苯基马来酰亚胺(NPMI)]三元共聚物增加ABS/PC合金的韧性。结果表明,ABS接枝粉对ABS/PVC合金的冲击性能具有明显的提高作用,而且同时接枝甲基丙烯酸甲酯(MMA)后对ABS/PC合金的冲击性能也有较大程度的提高作用;(丙烯腈/苯乙烯/NPMI)三元共聚物对ABS/PC合金具有明显的增韧作用。     

PC/ABS回收料的改性研究

采用双螺杆熔融挤出的方法将不同含量相容剂(马来酸酐接枝苯乙烯-丁二烯共聚物,BS-g-MAH)、ABS高胶粉(g-ABS)分别与PC/ABS回收料融熔共混,并对共混材料进行了力学性能表征,结果表明:添加2%相容剂能有效改善PC与ABS的相容性,提高ABS回收料的拉伸强度,但对材料的冲击强度作用不大;随着ABS高胶粉含量的增加,回收料的悬臂梁缺口冲击强度逐渐上升,拉伸强度及断裂伸长率则先上升后下降,当添加15%ABS高胶粉时,回收料的综合性能最佳。     

相容剂对PC/ABS合金性能的影响

研究了自制的两种相容剂对PC／ABS合金的力学性能、应力开裂性能和熔体流动速率的影响,并用SEM研究了共混体系的相容性。结果表明,相容剂A[(苯乙烯／马来酸酐）共聚物]和相容剂B（ABS接枝共聚物）,均可提高共混体系中两组分的相容性。A、B的最佳用量分别为2％和5％。     

相容剂SEBS-g-MAH对回收HIPS、ABS的共混物流变性能的影响

以苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)为相容剂制备了回收高冲击强度聚苯乙烯(HIPS)和丙烯腈-丁二烯-苯乙烯共聚物(ABS)的共混物。利用熔体质量流动速率试验机和毛细管流变仪分析研究了该HIPS/ABS/SEBS-g-MAH共混物的流变行为。结果表明:在测试温度、应力条件下,该HIPS/ABS/SEBS-g-MAH共混物均为假塑性流体;随着相容剂SEBS-g-MAH用量的增加,共混物的非牛顿指数和黏流活化能均先增大后减小,且在相容剂SEBS-g-MAH用量为15 phr时达到最大值。     

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。     

丙烯酸漆对PC/ABS共混物性能和微观结构的影响

采用熔融共混法制备了聚碳酸酯/丙烯腈-丁二烯-苯乙烯共聚物(PC/ABS)的共混物,利用力学性能测试和SEM分析手段考察了丙烯酸油漆对共混物力学性能和微观结构的影响。结果表明:随着浸泡时间、干燥温度和干燥时间的增加,PC/ABS共混物的力学性能都随之下降;另外,随着ABS和相容剂含量的增加,PC/ABS共混物抗溶蚀能力均逐渐提高,其中ABS含量达到50%时,共混物力学性能保持率最佳。     

有机蒙脱土改性PC/ABS合金材料的力学性能研究

以有机蒙脱土、相容剂为改性材料,采用熔融插层法制备了有机蒙脱土/聚碳酸酯(PC)/丙烯腈-苯乙烯-丁二烯共聚物(ABS)复合材料,研究了增容剂用量、有机蒙脱土用量对复合材料力学性能的影响。结果表明:相容剂和有机蒙脱土的加入不仅使PC/ABS合金材料的韧性显著增加,而且其刚性也有所增强。     

无卤阻燃PC/ABS合金的研究

研究了四苯基间苯二酚基二磷酸酷(RDP)和氢氧化铝复配阻燃体系对PC/ABS合金性能的影响;并以马来酸酐接枝丙烯腈-苯乙烯-丁二烯共聚物(ABS-g-MAH)为相容剂,考察了ABS-g-MAH的用量对合金性能的影响.结果表明,复配阻燃体系可显著提高PC/ABS合金的阻燃性能,当RDP为14份、Al(OH)3为6份时,氧指数可达到32%;相容剂的加人能够明显提高合金的力学性能,最佳用量为6%,但使体系的黏度增加,熔体质量流动速率降低.     

阻燃PC/ABS合金的研制及其在电器上的应用

通过对3种增容剂增容PC／ABS合金性能的测试对比,选用了1种效果最佳的增容剂制备PC／ABS合金．用十溴联苯醚和三氧化二锑作为阻燃体系,对阻燃PC／ABS合金的力学性能、热性能、阻燃性能进行了检测。结果表明,当PC：ABS：增容剂：阻燃体系为70：30：8：15时,阻燃PC／ABS合金的综合力学性能最好,阻燃性能达到UL 94V-0级．该合金已用于生产防火电器开关、插座面板系列产品。     

PC／ABS合金的增韧研究

对弹性体和增容剂增韧PC／ABS合金进行了试验研究,表明弹性体与增容剂的适当组合优于单组份的增韧效果,并且利用这种协同作用,可在一定程度上克服增韧对材料拉伸强度等性能指标造成的损失,达到优化材料性能的目的。     

AS-g-MAH增容PC/ABS合金的研究及应用

研究了增容剂马来酸酐接枝(丙烯腈/苯乙烯)共聚物(AS-g-MAH)对PC/ABS合金加入玻璃纤维(GF)前后力学性能的影响,并采用扫描电子显微镜观察了PC/ABS合金加入增容剂及GF前后的微观结构。结果表明,AS-g-MAH的加入使PC/ABS合金的力学性能得到提高;微观形貌特征和力学性能试验结果完全相符。制得的增容改性PC/ABS合金可满足安全边界条和导向轮材料的要求。     

成分因素对PC/ABS合金暴露在烷基苯中力学性能的影响研究

通过万能拉伸试验机检测聚碳酸酯/丙烯腈?丁二烯?苯乙烯共聚物（PC/ABS）合金置于烷基苯后拉伸应变和拉伸强度的变化,研究了烷基苯对其力学性能的影响规律。结果表明,经过60 ℃烷基苯浸渍处理30 d后,分别添加了马来酸酐接枝低密度聚乙烯（PE?g?MAH）、马来酸酐接枝ABS（ABS?g?MAH）、甲基丙烯酸缩水甘油酯接枝乙烯?1?辛烯共聚物（POE?g?GMA）的PC/ABS的断裂拉伸应变变化率下降了58.8 %、25.4 %和41.3 %;相比于ABS,PC组分是导致断裂拉伸应变下降的一个关键因素;有效的相容剂能延长PC/ABS合金在类烷基苯溶剂中保持力学性能稳定性的时间;阻燃剂分散在PC/ABS体系中,在烷基苯渗透作用下更容易发生韧?脆行为转变。     

Effect of compatibilizer in acrylonitrile‐butadiene‐styrene toughened nylon 6 blends: Ductile–brittle transition temperature

The ductile–brittle transition temperatures were determined for compatibilized nylon 6/acrylonitrile‐butadiene‐styrene (PA6/ABS) copolymer blends. The compatibilizers used for those blends were methyl methacrylate‐co‐maleic anhydride (MMA‐MAH) and MMA‐co‐glycidyl methacrylate (MMA‐GMA). The ductile–brittle transition temperatures were found to be lower for blends compatibilized through maleate modified acrylic polymers. At room temperature, the PA6/ABS binary blend was essentially brittle whereas the ternary blends with MMA‐MAH compatibilizer were supertough and showed a ductile–brittle transition temperature at ?10°C. The blends compatibilized with maleated copolymer exhibited impact strengths of up to 800 J/m. However, the blends compatibilized with MMA‐GMA showed poor toughness at room temperature and failed in a brittle manner at subambient temperatures. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2643–2647, 2003     

Studies on morphology and thermomechanical performance of ABS/PC/organoclay hybrids

In the present research, poly(acrylonitrile‐butadiene‐styrene)/polycarbonate (ABS/PC) blends were prepared in a twin screw extruder. An attempt to reinforce and promote compatibility of the above systems was made by the incorporation of organically modified montmorillonite (OMMT, Cloisite 30B), as well as by the addition of compatibilizer (ABS grafted with maleic anhydride, ABS‐g‐MAH), and the effect of those treatments on the morphology, thermal transitions, rheological, and mechanical properties of the above blends was evaluated. The addition of compatibilizer in ABS/PC blends does not significantly affect the glass transition temperature (T_g) of SAN and PC phases, whereas the incorporation of Cloisite 30B decreases slightly the T_g values of SAN and, more significantly, that of PC in compatibilized and uncompatibilized blends. The T_g of PB phase remains almost unaffected in all the examined systems. The obtained results suggest partial dissolution of the polymeric components of the blend and, therefore, a modified Fox equation was used to assess the amount of PC dissolved in the SAN phase of ABS and vice versa.Reinforcing with OMMT enhances the miscibility of ABS and PC phases in ABS/PC blends and gives the best performance in terms of tensile strength, modulus of elasticity, and storage modulus, especially in 50/50 (w/w) ABS/PC blends. The addition of ABS‐g‐MAH compatibilizer, despite the improvement of intercalation process in organoclay/ABS/PC nanocomposites, did not seem to have any substantial effect on the mechanical properties of the examined blends. POLYM. COMPOS., 35:1395–1407, 2014. © 2013 Society of Plastics Engineers     

Effects of mixing protocol on morphology and properties of PA6/ABS blends compatibilized with MMA‐MA

The effect of different mixing protocols in the preparation of PA6/ABS/MMA‐MA (57.5/37.5/5 wt %) blends on their morphological, rheological, thermal, thermomechanical, and mechanical behavior were studied. Despite the second‐phase size reduction due to copolymer incorporation, mixing sequence seems to play an important role in the properties of the blends. When PA6 is blended with the pre‐blended ABS/MMA‐MA system, compatibilizer is preferentially located in ABS phase and a co‐continuous structure is formed. The co‐continuity is believed to be responsible for the enhancements in toughness, but excessive presence of MMA‐MA in ABS phase seems to hamper thermomechanical properties. On the other hand, when ABS is blended with the PA6/MMA‐MA system previously prepared, compatibilizer is preferentially located in PA6 phase and a particle‐in‐matrix morphology is observed. The absence of excessive amount of MMA‐MA in ABS phase avoids the negative effect on thermomechanical resistance, however enhancements in toughness are not so pronounced. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43612.     

Dynamic‐mechanical analysis of MWNTs‐filled PC/ABS blends

In a systematic manner, the roles of MWNTs as filler and styrene acrylonitrile copolymer‐graft‐maleic anhydride (SAN‐MA) as compatibilizer, individually and together, on dynamic‐mechanical behavior of polycarbonate (PC)‐rich/acrylonitrile butadiene styrene terpolymer (ABS) blend were studied. The investigations were performed using small‐scale mixing in a one‐step procedure with a fixed MWNTs content of 0.75 wt% and a blend composition of PC/ABS = 70/30 w/w. PC/SAN blends and nanocomposites as simpler model system for PC/ABS were also studied to reveal the role of the rubbery polybutadiene (PB) fraction. It is found that the tendency of MWNTs to localize within the PC component in compatibilized PC/ABS was lower than in compatibilized PC/SAN blends. Dynamic mechanical analysis (DMA) revealed the dual role of SAN‐MA as blend compatibilizer and also promoter of MWNTs migration towards PC, where SAN‐MA to MWNTs weight ratio varied between 1 and 4. At the compatibilizer/MWNTs weight ratio of 1, MWNTs localized in PC component of the blends whereas increasing the compatibilizer/MWNTs ratio to 4 led to migration of MWNTs toward SAN or ABS component. In DMA studies, loss modulus normalization of the nanocomposites revealed the coexistence of mobilized and immobilized regions within the nanocomposite structure, as a result of MWNTs and compatibilizer loading. POLYM. ENG. SCI., 54:2696–2706, 2014. © 2014 Society of Plastics Engineers