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％。     

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。     

一种新型相容剂对PA/ABS合金力学性能的影响

通过自制丙烯腈-丁二烯-苯乙烯共聚物(ABS)与乙烯-丙烯酸甲酯共聚物(EMA)双组份接枝马来酸酐的新型相容剂(ABS/EMA-g-MAH),并与国内外相容剂马来酸酐接枝丙烯腈-丁二烯-苯乙烯(ABS-g-MAH)、苯乙烯-马来酸酐共聚物(SMA)进行比较,研究了相容剂种类、相容剂含量及挤出机螺杆转速对尼龙/丙烯腈-丁二烯-苯乙烯共聚物(PA/ABS)合金力学性能的影响。研究表明,ABS/EMA-g-MAH为PA/ABS合金的最佳相容剂;在添加量为12%时ABS/EMA--g-MAH表现出最佳的增容增韧效果;降低挤出机螺杆转速可使PA6/ABS合金的缺口冲击强度提高。     

PA6/ABS合金的增韧改性研究

采用马来酸酐接枝丙烯腈-丁二烯-苯乙烯共聚物(ABS-g-MAH)、马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)和苯乙烯-马来酸酐共聚物(SMA)为相容剂,研究了相容剂种类、相容剂含量、增韧剂含量及挤出机螺杆转速对尼龙6/丙烯腈-丁二烯-苯乙烯共聚物(PA6/ABS)合金力学性能的影响。研究表明,ABS-g-MAH为PA6/ABS合金的最佳相容剂,且质量分数为20%时合金的缺口冲击强度最高;采用ABS-g-MAH和POE-g-MAH复合增容增韧可得到力学性能优越的PA6/ABS合金;降低挤出机螺杆转速可使PA6/ABS合金的缺口冲击强度提高。     

PP-g-MAH改性PC/ABS合金的研究

用自制马来酸酐接枝聚丙烯(PP-g—MAH)对PC／ABS舍金进行改性研究。结果表明，PP-g-MAH对PC／ABS合金有明显增容作用，可使合金的缺口冲击强度显著提高，当接枝物中马来酸酐(MAH)含量为5％、引发剂过氧化二异丙苯(DCP)含量为0．27％，PC／ABS合金中PP—g—MAH用量为2．5份时，合金综合性能最佳，其缺口冲击强度可达44kJ／m^2。     

相容剂对PC/ABS合金力学性能的影响

研究了两种自制相容剂G1(苯乙烯/马来酸酐共聚物)和G2(改性马来酸酐接枝ABS)对PC/ABS合金力学性能(如缺口冲击强度、拉伸强度、伸长率和熔体流动速率)的影响。结果表明,两种相容剂都可有效提高PC/ABS合金的相容性,G1和G2的最佳加入量分别为3%和6%;相容剂的加入能够明显提高PC/ABS合金的冲击强度,增加体系粘度,降低熔体流动速率。     

PC/ABS合金新型高效相容剂

以能之光新研发的高效相容剂600A与丙烯腈-丁二烯-苯乙烯接枝马来酸酐(ABS-g-MAH)、聚烯烃-g-MAH以及甲基丙烯酸-丁二烯-苯乙烯共聚物(MBS)作为聚碳酸酯(PC) /ABS合金的相容剂进行了应用对比分析,研究了各类相容剂不同添加量对合金材料力学,外观等性能的影响.结果表明:相对于其他相容剂,600A由于其特殊的多组分体系协同效应,在添加量为1.5％时就能表现出优异相容增韧效果,大大节省了成本.     

阻燃高光泽PC/ABS合金的制备

制备了高光泽聚碳酸酯(PC),丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金,用TiO2和磷酸酯改善合金的表面硬度和阻燃性能;用甲基丙烯酸缩水甘油酯、丙烯酸树脂和乙烯的三元共聚物,乙烯-丙烯酸甲酯共聚物(1125AC),苯乙烯接枝马来酸酐共聚物(SMA)作相容剂改善PC/ABS合金的相容性;通过测试合金的光泽度和表面硬度探...     

相容剂对HDPE/PC共混合金性能的影响

采用熔融接枝方法制备马来酸酐接枝高密度聚乙烯(HDPE-g-MAH)和丙烯酸接枝高密度聚乙烯(HDPE-g-AA)，比较了这2种相容剂对HDPE／聚碳酸酯(Pc)共混合金体系的增容效果，着重研究了接枝单体、引发剂对HDPE接枝物的接枝率和熔体流动速率的影响及HDPE接枝物用量对HDPE／PC合金力学性能的影响。结果表明：HDPE-g-MAH相容剂的增容效果较好。用量为15份时使HDPE／PC合金缺口冲击强度提高了30％。     

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.     

Influence of rubber content in ABS in wide range on the mechanical properties and morphology of PC/ABS blends with different composition

A series of acrylonitrile–butadiene–styrene (ABS) with different rubber content were prepared by diluting ABS grafting copolymer containing 60% rubber with a styrene–acrylonitrile copolymer. ABS prepared were blended with bisphenol‐A‐polycarbonate (PC) at the ratio of 70/30, 50/50, and 30/70 to prepare PC/ABS blends. Influence of rubber content in ABS on the properties of ABS and PC/ABS blends were investigated. PC/ABS blends with different compositions got good toughness when the rubber in ABS increased to the level that ABS itself got good toughness. The tensile properties and processability of PC/ABS blends decreased with the increase of the total rubber content introduced into the blends. ABS with the rubber content of 30 wt% is most suitable to be used to prepare PC/ABS blends. The rubber content in ABS affected the viscosity of ABS, and subsequently the viscosity ratio of PC to ABS. As a result, the morphology of PC/ABS blends varied. The increase of rubber content in ABS results in finer structure of PC/ABS blends. POLYM. ENG. SCI. 46:1476–1484, 2006. © 2006 Society of Plastics Engineers.     

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。     

Influence of ABS type on morphology and mechanical properties of PC/ABS blends

The morphology and the mechanical properties of polycarbonate (PC) blends with different acrylonitrile–butadiene–styrene (ABS) materials were investigated. PC/ABS blends based on a mass-made ABS with 16% rubber and large (0.5–1μm) rubber particles are compared to blends based on an emulsion-made ABS with 50% rubber and small, monodisperse (0.12 μm) rubber particles over the full range of blend compositions. The blends with the bulk ABS showed excellent impact strength for most compositions, and those containing 50 and 70% PC exhibited ductile to brittle transition temperatures below that of PC. The blends with the emulsion ABS showed excellent toughness in sharp notch Izod impact tests at room temperature and in standard notch Izod impact tests at low temperatures near the T_g of the rubber. By melt blending the various ABS materials with a styrene–acrylonitrile (SAN 25) copolymer, materials with lower rubber concentrations were obtained. These materials were used in blends with PC to make comparisons at constant rubber concentration of 5, 10, and 15%. The results of this investigation show that brittle ABS materials can produce tough PC–ABS blends. It is apparent that small rubber particles toughen PC–ABS blends at lower rubber concentrations and at lower temperatures than is possible with large rubber particles. However, additional work is needed to understand the nature of toughening in these PC–ABS blends with different rubber phase morphologies. It is of particular interest to understand the exceptional ductility of some of the blends at low temperatures. © 1994 John Wiley & Sons, Inc.     

Effects of blend composition on the morphologies and physical properties of polycarbonate/acrylonitrile-butadiene-styrene blends

The morphologies and physical properties of twin-screw-extruded polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends with various blend ratios are studied. The needle-like co-continuous phase in PC-rich blends changes to the sea-island phase for blend ratios of more than 50 wt% ABS. While pure PC exhibits an almost-Newtonian flow behavior, PC/ABS blends exhibit the interesting rheological transition. The viscosities of the ABS-rich blends at low shear rates are almost equal to those of the pure ABS polymer. The yield stress for the PC/ABS blend ratio of 3:7 is the highest in composition. At the frequency of 10 rad/s, the PC-rich blends exhibit highly viscous properties, whereas the ABS-rich blends present highly elastic properties as the temperature increases. Moreover, the ABS polymer in the PC/ABS polymer blend induces significant change at the fracture surface of PC, transitioning from brittle to ductile nature.     

抗静电PC/ABS合金材料的研究

研究了聚碳酸酯（ＰＣ）与ＡＢＳ共混体系的抗静电性能及其影响因素。结果表明：二价的烷基苯磺酰盐是ＰＣ／ＡＢＳ合金材料较好的抗静电剂,可降低材料的表面电阻率和体积电阻率;在一定范围内,抗静电剂用量越多,抗静电效果越好;用马来酸酐接枝聚乙烯作增容剂能提高ＰＣ／ＡＢＳ合金的抗静电性能;学能改善共混物的相容性,从而提高合金材料的冲击强度。     

聚环氧酯的合成及其对PC/ABS相容性的影响

以双酚A环氧树脂和己二酸合成了聚己二酸环氧酯,将环氧酯作为相容剂加入到PC/ABS中通过双螺杆挤出机并注射成型制备了合金,与马来酸酐接枝聚苯乙烯（SMA）相容剂增容的合金的力学性能及分散形态进行了对比。结果表明,聚环氧酯对PC相具有良好的相容性,而SMA对ABS相的相容性较好,二者复合使用可以显著改善合金的相容性;聚环氧酯能明显提高PC/ABS合金的拉伸强度和缺口冲击强度,但过量加入会降低合金的冲击强度;SEM结果表明少量的聚环氧酯即可以使ABS分散相分布均匀,与SMA并用可以使分散相尺寸减小,提高相容性。     

新一代高性能PC/ABS合金的研究

通过对聚碳酸酯(PC)/(丙烯腈/丁二烯/笨乙烯)共聚物(ABS)合金失效原因分析,对材料的各组分选材进行优化,研究了PC/ABS合金经多次循环回收、高温高湿加速老化、长期高温热老化后的性能变化情况.配方优化后的PC/ABS材料既可成型薄壁大型制件,又具有优良的耐久性,且可以回收利用.     

ABS/PC共混合金组成与性能的研究

选用两种不同牌号的ABS树脂与PC共混,并对其组成与性能的关系进行了系统的研究。结果表明,ABS的组成不同,ABS PC混合物的相容性、力学性能以及流变行为都不相同。     

Effect of polycarbonate molecular weight on polymer blends of polycarbonate and ABS

The melt viscosity of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends relative to PC is significantly lower, even lower than that of pure ABS in some compositions. Annealing above the T_g of PC coalesces and coarsens phase structure in core and skin regions. Increase in the molecular weight of PC in PC/ABS blends results in low-temperature fracture toughness improvement but suffers from the disadvantage of higher melt viscosity. The selection of PC in PC/ABS blends must be a compromise between the toughness advantages of higher PC molecular weight and the disadvantage of higher melt viscosity. © 1993 John Wiley & Sons, Inc.     

Thermal aging of bisphenol-A polycarbonate/acrylonitrile–butadiene–styrene blends

Thermal aging of immiscible bisphenol-A polycarbonate/acrylonitrile–butadiene–styrene (PC/ABS) blends containing 25, 60, and 75% PC and the PC and ABS blend components have been studied. Changes in Izod impact properties and dynamic mechanical spectra are reported following aging at 90, 110, and 130°C for times up to 1500 h. PC/ABS blends containing 60 and 75% PC were found to retain high impact performance following aging at elevated temperatures, compared to the PC blend component. Dynamic mechanical spectroscopy is an effective probe for investigating the structure–property changes occurring and the mechanisms of aging. For PC and ABS, the changes were mainly due to physical aging of the amorphous polymers when aged below the glass-transition temperature. For the PC/ABS blends, oxidative degradation additionally contributes to loss of toughness. Although structure–property changes are related to the behavior of the blend components, additional factors of potential importance for multiphase polymer–polymer systems have been identified, including a redistribution of stabilizers during the blend manufacture. © 1995 John Wiley & Sons, Inc.