PC/SAN/高胶ABS合金的制备与性能研究

在不加入增容剂的情况下，利用高胶ABS与SAN、PC共混制备了性能优良的PC／SAN／高胶ABS合金。研究了PC用量、高胶ABS用量以及外加增容剂等对PC／SAN／高胶ABS合金性能的影响。结果表明，随着PC用量的降低，合金的缺口冲击强度、弯曲强度和拉伸强度均降低，但降低幅度较小。在高胶ABS质量分数为2．5％-15％范围内，合金的冲击强度基本没有变化，但弯曲强度和拉伸强度却降低。外加增容剂并不能明显提高合金的力学性能。     

阻燃、耐热、高抗冲ABS合金

ABS合金化是提高ABS综合性能的有效途径。本研究开发成功ABS／PVC、ABS／PC、ABS／SMA合金,其中ABS／PC合金具有阻燃、耐热、高抗冲性能。     

PC/ABS合金研究进展

介绍了PC／ABS合金在国内外的发展状况,主要介绍了PC/ABS合金的相容性以及影响PC／ABS合金性能的因素,并对PC／ABS合令发展前景进行分析,认为此合金在国内实现工业开发是可行的,其研究的中心内容是相容性技术。     

磷酸酯类阻燃剂在PC／ABS合金中的应用

文章研究了磷酸酯类阻燃剂RDP、BDP以及它们与TPP的协同作用对PC／ABS合金的阻燃性能、热失重行为以及力学性能的影响。结果表明,PC／ABS合金的LOI随着阻燃和的增加而增加,当阻燃剂RDP和BDP添加量均为15％时,LOI达到最大值,分别为363％和35．3％,且均达FV-0级。通过热重分析表明,阻燃PC／ABS比纯PC／ABS合金的分解速率小得多。研究还表明,阻燃剂的协同作用使PC／ABS合金的阻燃性能优于添加单一阻燃剂的PC／ABS合金的阻燃性能。     

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。     

无卤阻燃PC/ABS合金的研究进展

综述了近年来国内外采用无卤阻燃剂阻燃PC／ABS合金的研究进展。介绍了PC／ABS合金无卤阻燃剂的分类、阻燃机理及存在的一些问题和解决方法。重点介绍了有机磷系阻燃剂及其对PC／ABS合金的阻燃性能、热分解和机械性能等的影响,并指出了今后的研究重点和发展方向。     

无卤阻燃PO／ABS合金的研究进展

综述了近年来国内外采用无卤阻燃剂阻燃PC／ABS合金的研究进展。介绍了PC／ABS合金无卤阻燃剂的分类、阻燃机理及存在的一些问题和解决方法。重点介绍了有机磷系阻燃剂及其对PC／ABS合金的阻燃性能、热分解和机械性能等的影响,并指出了今后的研究重点和发展方向。     

高性能PC／ABS合金的研制

利用双螺杆挤出机制备PC／ABS合金,探讨了基材不同种类的选择及其比例的调整对PC／ABS合金性能的影响。结果表明：在PC／ABS合金（70／30）体系中,选用23．23％SAN粉料和5．89％高胶粉替代ABS粒料制成的合金缺口冲击强度可达95．04kJ／m^2,拉伸强度达58．28MPa,弯曲强度达73．8MPa。     

产品开发

改性ABS前途无量 随着我国电子计算机、汽车、交通运输等工具的快速发展,这些领域对ABS树脂性能要求越来越高,对改性ABS塑料的需求快速增长。改性ABS塑料品种很多,主要有：①阻燃ABS;②耐热ABS;③玻纤增强ABS;④抗静电／导电ABS;⑤高光高流动性ABS;⑥ABS／PC合金;⑦ABS／PA合金;⑧ABS／PBT合金。改性ABS塑料产品发展潜力巨大。     

PC回收料／ABS塑料合金的研究

本文以PC回收料为主要原料,用少量ABS对其进行改性,制备了PC回收料／ABS塑料合金。着重探讨了ABS用量、相容剂用量及不同弹性体等因素对该塑料合金冲击性能的影响。实验结果表明：相容剂可显著提高PC与ABS的相容性,随着相容剂用量的增加,PC／ABS合金的缺口冲击强度显著增大,在PC与ABS配比为90／10、相容剂为5份时,所得合金的缺口冲击强度可达13．8kJ/m^2;用弹性体代替部分相容剂,同样可显著提高PC／ABS塑料合金的性能,在弹性体A和相容剂分别为3份时,缺口冲击强度亦可达14．7kJ/m^2。     

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.     

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.     

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.     

磷酸酯与纳米蒙脱土协同阻燃PC/ABS合金的研究

研究了多芳基磷酸酯PX220与纳米蒙脱土复配阻燃剂对聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯(ABS)合金的阻燃性能、热失重行为、力学性能及热变形温度的影响;并采用锥形量热仪对合金材料的燃烧性能进行测定。结果表明:PX220添加量为10份,纳米蒙脱土添加量2份时,PC/ABS合金的极限氧指数达到29%,燃烧性能达到UL 94V-0级。锥形量热仪分析结果表明:复配阻燃PC/ABS合金的热释放速率峰值、平均热释放速率、总释放热、平均有效燃烧热和平均质量损失速率都大幅下降,说明PX220与纳米蒙脱土具有非常好的协同阻燃作用。     

ABS／PC塑料合金的研究

ＡＢＳ／ＰＣ塑料合金具有优良的耐热和机械性能，特别具有良好的低温冲击性能。本课题研究了ＡＢＳ／ＰＣ的配比对合金的拉伸强度、冲击强度、耐性能的影响；并对添加相容剂的种类、含量的多少作了较详细的研究。所研制的系列产品与国外同类产品性能相当。     

Fractography of injection molded polycarbonate acrylonitrile-butadiene-styrene terpolymer blends

Fractography has been used in the post-failure analysis of single edge notched specimens of injection molded blends of polycarbonate (PC) and acrylonitrile-butadiene-styrene terpolymer (ABS). The mode of ductile tensile fracture of single edge notched specimens depended on comosition. Plane stress shear tearing was observed in the composition range PC/ABS 90/10 to 70/30 by weight where PC was the continuous phase. Intermediate compositions, PC/ABS 60/40 to 40/60, had a co-continuous or almot co-continuous phase morphology; these blends fractured by mixed mode pop-in, where a tunneling center crack relieved the triaxiality and permitted plane stress shear lips to form near the edges. Herringbone fracture, a plane strain mode characterized by discontinuous crack growth, was observed when ABS was the continuous phase, PC/ABS 30/70 to 10/90. An S-shaped relationship was observed between the ductile-to-brittle transition temperature and the composition. Addition of ABS to PC increased ductility up to PC/ABS 70/30 and 60/40, which were the most ductile compositions. Further addition of ABS decreased the ductility, and the least ductile compositions were PC/ABS 30/70 and 10/90.     

磷酸酯阻燃PC/ABS合金的研究及应用

研究了磷酸三苯酯（TPP）、间苯二酚双（二苯基磷酸酯）（RDP）、缩聚型固体磷酸酯（PX）和增容增韧剂对聚碳酸酯（PC）/丙烯腈-丁二烯-苯乙烯共聚物（ABS）合金阻燃性能的影响。结果表明,TPP、RDP、PX均可显著提高PC/ABS合金的阻燃性能,增容增韧剂可以改善体系的力学性能;当PC/ABS为7/3时,分别加入11 %、14 %和12 %（质量分数,下同）的3种阻燃剂,并配以适量的增容增韧剂和其他助剂,可以制得等级为UL94 V-0级的PC/ABS合金。     

MBS改性PC/ABS合金的研究

研究了PC/ABS合金的相容性及适宜的合金比例,探讨了MBS对PC/ABS合金的增容和增韧作用,MBS对PC/ABS合金的力学性能和形态结构的影响。结果表明:在PC/ABS合金(70/30)体系中,加入6份MBS形成的复合材料与没有加入MBS相比,其相畴分布更加均一,冲击强度提高了40kJ/m2,拉伸强度、弯曲强度和热变形温度得到了较好的保持。     

Effects of acrylonitrile content on PC/ABS alloy systems with a flame retardant

To investigate the effect of a flame retardant on PC/ABS alloy systems, a reactive‐type brominated epoxy resin was used as a flame retardant, and mixed with PC/ABS at various amount using a twin‐screw extruder. The rheological, morphological, mechanical, and thermal properties were investigated as a function of acrylonitrile (AN) content in ABS. The shear viscosity of the PC/ABS blend increased as the AN content in ABS increased. Temperature drastically affected the shear viscosity in the ABS matrix, but not as much in the PC matrix. A blend of PC 50% containing AN 22% is suitable to process because its shear viscosity is low in the high shear rate region and its mechanical properties drastically increase in the beginning of the PC matrix. In addition, gradual increases of heat distortion temperature were observed in the entire range of the PC content. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 417–423, 2000