MBS对PC回收料/ABS合金力学性能的影响

采用熔融挤出的方法将聚碳酸酯(PC)回收料、丙烯腈-丁二烯-苯乙烯(ABS)、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)共混,固定PC与ABS质量比,制备了一系列不同MBS含量的PC回收料/ABS合金,研究了MBS对PC回收料/ABS合金力学性能的影响。结果表明当合金中MBS含量为8%时,共混物的冲击强度最高,断裂伸长率最大,拉伸强度保持良好,PC回收料/ABS合金综合力学性能最优。     

中国塑料专利

正一种耐湿热老化、高PU泡沫结合强度PC/ABS材料本发明涉及一种适用于仪表板骨架的PC/ABS材料,涉及到该材料的配方设计与具体使用。本发明提供的PC/ABS材料针对仪表板的加工和使用特点,相比于普通的PC/ABS材料具有三方面优点:首先选用含Si-MBS改善了材料的韧性,特别是经过长期使用而老化后的韧性;其次,通过对PC进行封端,增强了材料的长期耐热老化性能;第三点是通过引入SMA或其衍生物,增强表面极性和官能团数量增强了与PU泡沫层的结合力。本发明所制备的PC/ABS材料具有耐湿热老化、高PU泡     

复配磷酸酯阻燃PC／ABS合金的研究

研究了复配磷酸酯阻燃剂对PC/ABS合金材料的性能的影响.探讨了复配磷酸酯阻燃剂阻燃PC/ABS合金材料的力学性能和阻燃性能,复配阻燃剂对PC/ABS合金的阻燃机理.结果表明:在PC/ABS合金(质量比为70/30)体系中,磷酸三苯酯(TPP)和四苯基[双酚-A]二磷酸酯(BDP)按质量比为3:2复配具有协同阻燃作用.加入18份复配阻燃剂后材料的氧指数提高了6个单位,阻燃性能达到了FV-0级,并保持了材料较好的力学性能.     

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。     

螺杆组合及加料方式对PC/ABS力学性能的影响

研究了不同螺杆组合及加料方式对聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)合金挤出工艺和材料力学性能的影响,并设计了一种适合于PC/ABS合金加工的螺杆组合方式.结果表明:适当的螺杆组合和加料方式可改善PC/ABS的挤出工艺,提高材料的力学性能;PC/ABS合金的拉伸强度和弯曲强度分别由原来的56.43...     

光盘回收PC改性ABS树脂研究

用光盘回收的聚碳酸酯（PC）树脂制备了丙烯腈-丁二烯-苯乙烯共聚物（ABS）/PC合金,探讨了回收PC含量、增容剂种类对合金力学性能的影响。结果表明,ABS/PC合金的拉伸强度随回收PC含量的增加而逐渐增大,冲击强度则呈先增长后下降的趋势,在回收PC含量为10 %（质量分数,下同）时达到最大值;增容剂甲基丙烯酸甲脂-丁二烯-苯乙烯共聚物（MBS）比甲基丙烯酸环氧丙酯接枝乙烯-辛烯共聚物（POE-g-GMA）更能改善ABS和PC的相容性,显著提高合金冲击强度,当回收PC含量为5 %时,用MBS增容的ABS/PC合金的冲击强度比纯ABS提高了42.8 %。     

高流动性无卤阻燃PC/ABS合金的制备

利用双螺杆挤出机制备高流动性无卤阻燃PC/ABS合金,研究基材配比、不同相容剂及其用量、阻燃剂磷酸三苯酯(TPP)对PC/ABS共混合金力学性能、阻燃性能、流动性能的影响。结果表明:当m(PC)∶m(ABS)=80∶20,阻燃剂TPP用量12%,相容剂MBS用量6%时,PC/ABS合金具有超高流动性和力学性能,同时能够满足UL94 V0无卤环保阻燃,可用于大尺寸液晶电视外壳材料。     

注塑工艺对PC/ABS合金电镀性能的影响研究

对聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯(ABS)合金采用使用不同的注塑工艺注塑后电镀。研究了注塑工艺对PC/ABS合金粗化性能和镀层结合力的影响。结果表明:注塑工艺对PC/ABS合金的粗化性能和镀层结合力影响较大,注塑温度过低、压力和速度过高以及模具温度过低都会降低PC/ABS合金的粗化性能和镀层结合力。     

改性PC/ABS合金的研究

以聚碳酸酯(PC)、丙烯腈–丁二烯–苯乙烯塑料(ABS)为主体材料,以苯乙烯、丙烯腈、甲基丙烯酸缩水甘油酯三元共聚物(SAG–002)和甲基丙烯酸甲酯、苯乙烯、有机硅组成共聚物(S-2001)为增容剂,通过熔融混合挤出制得PC/ABS合金。对PC/ABS合金的力学性能、流动性能、热性能进行测试和分析,采用差示扫描量热(DSC)仪观察两种增容剂对PC/ABS合金玻璃化转变温度的影响,并讨论了增容剂在PC/ABS合金中的作用机理。研究发现,在增容剂SAG–002用量为2份时,随PC含量的增加,PC/ABS合金的力学性能随之提高;增容剂S-2001在该PC/PBT合金中有明显的增韧作用;在PC/ABS(质量比为80/20)中,加入2份增容剂SAG-002和4份的增容剂S-2001,PC/ABS合金的相容性达到最佳状态。     

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。     

高性能PC／ABS合金的制备及性能研究

为改善PC／ABS合金的耐低温、耐热及成型加工等性能,通过PC、AS及高胶粉的复合,考察了AS含量对合金各项性能的影响,并制备了具有耐低温、高热变形温度、高流动性、综合性能优异的PC／ABS合金。     

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。     

Mechanical properties of blends of polycarbonate with unmodified and maleic anhydride grafted ABS

Blends of polycarbonate/acrylonitrile–butadiene–styrene terpolymer (PC/ABS) and polycarbonate/maleic anhydride grafted ABS (PC/MABS) were prepared over the whole range of compositions using a single-screw extruder. Tensile, flexural, notched Izod impact properties, and the heat deflection temperature of these blends were determined. Mechanical properties of PC/MABS blends are nearly equal to or higher than, those predicted by the rule of mixtures, whilst those of PC/ABS blends show nearly equal, or negative deviation, from the rule of mixtures. The notched impact strength of PC/MABS blends shows a positive blending effect and proportionate increase from 25wt% PC to 75wt% PC. Scanning electron micrographs were taken of etched surfaces of selective blends. © 1998 SCI.     

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.     

Thermal behavior,morphology, and some melt properties of blends of polycarbonate with poly(styrene-co-acrylonitrile) and poly(acrylonitrile-butadiene-styrene)

Blends of bisphenol-A polycarbonate (PC) with poly- (styrene-co-acrylonitrile) (SAN) and poly (acrylonitrile-butadiene-styrene) (ABS) prepared by screw extrusion and solution-casting were investigated by differential scanning calorimetry and scanning electron microscopy. From the measured glass-transition temperatures (T_g) and specific heat increments (ΔC_p) at the T_g, SAN appears to dissolve more in the PC-rich phase than does PC in the SAN-rich phase. Also, the decrease of T_g (PC) in PC/ABS blends is larger than in the PC/SAN blends. From the T_g behavior and the electron microscopy study, it is suggested that the compatibility increases more in the SAN-rich compositions than in the PC-rich compositions of the blends. In the study of extrudate swell of the PC/SAN blends and the PC/ABS blends, the maximum level of extrudate swell is reached at 0.5 weight fraction of PC for both blend systems. The Flory-Huggins polymer-polymer interaction parameter (χ12) between PC and SAN was calculated and found to be 0.034 ± 0.004. A similar value of χ for PC and SAN was found with the PC/ABS blends.     

Effects of processing conditions on the phase morphology of PC/ABS polymer blends

The phase morphology of PC/ABS blends can be significantly affected by its processing conditions. Blends prepared in a mixing chamber at different conditions show a strong influence of mixing time and temperature on its morphology. The blend morphology changes from a well-dispersed PC phase surrounded by the ABS matrix phase to a cocontinuous morphology with increase in the mixing time. Higher blending temperatures promote changes in the PC/ABS morphology, probably due to thermal degradation. The rotor speed has not shown much influence on the blend phase morphology. The cocontinuous phase morphology of the PC/ABS blends obtained after mixing for 10 min was shown to be unstable as detected by the heat treatment. A melt annealing for a few minutes showed a significant change in the morphology. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:1605–1613, 1998     

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。     

Interactive effect of ammonium polyphosphate and montmorillonite on enhancing flame retardancy of polycarbonate/acrylonitrile butadiene styrene composites

The effect of two flame retardants [ammonium polyphosphate (APP) and montmorillonite (MMT)] was studied in relation to flame retardancy, mechanical properties and physical characteristics of polycarbonate (PC)/acrylonitrile butadiene styrene (ABS) blends. Moreover, the possible synergistic effect of these two flame retardant additives on the macromolecular blends was studied as well. Based on this research, it was revealed that APP- and MMT-raised loading has significantly increased the limiting oxygen index (LOI) of the resulting PC/ABS blends, which is due to the intumescence effect provoked by the incorporation of these flame retardant fillers. Incorporation of APP improved the LOI through intumescence effect while the addition of MMT led to intercalation of PC/ABS polymer matrix into the interlayer galleries of MMT particles. Besides, higher APP loading in PC/ABS blends has significantly promoted the formation of carbonaceous char residues as evidenced in TGA analysis, which indicates that addition of higher APP could improve thermal stability of PC/ABS blends. To improve the tensile strength and elongation-at-break, APP loading of 25 phr in PC/ABS blends together with various MMT loading would be suitable to ensure good dispersion and interfacial adhesion between the polymer chains and the additives. However, it is important to control the loading level of MMT as its excessive incorporation could result in flame-retarded PC/ABS blends with brittle behavior, showing weaker mechanical properties.