PPESK／PS共混物流变性能的研究

以溶液共沉淀的方法制备了含二氮杂萘联本结构的聚芳醚砜酮（PPESK）。聚苯乙烯（PS）共混物，用毛细管流变仪测定了共混物的流为性能。结果表明，在本实验条件下，PPESK／PS共混物熔体属假塑性非牛顿汉体，其熔体粘度随PS含量的增加、温度的升高、剪切速率的增大而下降。PS的加入有利于改善PPESK的熔融加工流动性。     

CPVC／ABS二元共混物性能的研究

研究了ABS树脂对CPVC／ABS共混物的力学性能和加工性能的影响。结果表明，随着ABS含量的增加，CPVC／ABS二元共混物的拉伸强度，维卡软化点和熔体粘度下降，而CPVC／ABS共混物冲击强度得到明显改善。     

CPVC／ABS二元共混物性能的研究

本文研究了ABS树脂对CPVC／ABS共混物的力学性能和加工性能的影响。结果表明,随着ABS含量的增加,CPVC／ABS二元共混物的拉伸强度、维卡软化点和熔体粘度下降,而CPVC／ABS共混物的冲击强度得到明显改善。     

PPESK／PAR共混物流动性、相容性及热性能研究

采用熔融共混挤出方法制备了不同配比的新型含二氮杂萘酮联苯结构聚芳醚砜酮（PPESK）／聚芳酯（PAR）共混物，考察了该共混体系的熔融加工性能及力学性能，采用扫描电镜（SEM）、动态热机械仪（DMTA）及热失重（TGA）对PPESK/PAR共混物的相容性及热性能进行表征和研究，采用多重扫描速率下的不定温法在氮气氛围中对PPESK/PAR热稳定性进行研究。结果表明：该共混体系为部分相容体系，聚芳酯的共混加入可以明显地改善PPESK熔融加工性能，加入PAR后降低了PPESK的热稳定性，共混物的力学性能也有不同程度的下降。     

PC/ABS共混物的流变性能

采用熔融共混的方法,制备了不同配比的聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯(ABS)共混物。采用毛细管流变仪研究了PC/ABS共混物的流变行为。结果表明:PC/ABS共混物熔体的流变行为呈假塑性流体的特征,表观黏度随剪切速率的增加而减小,随温度的升高而降低,随ABS含量的增加而减小;随着ABS含量的增加,共混物表观黏度对温度的敏感性降低,对剪切速率的敏感性增加;加入相容剂使PC/ABS共混物更易加工成型。     

CPVC/ABS二元共混物性能的研究

研究了ABS树脂对CPVC/ABS共混物的力学性能和加工性能的影响.结果表明随着ABS含量的增加,CPVC/ABS二元共混物的拉伸强度、维卡软化点和熔体粘度下降,而CPVC/ABS共混物的冲击强度得到明显改善;当ABS含量为30%时,共混物的冲击强度为11.0 kJ/m2,维卡软化点为110 ℃,凝胶化时间为52 s,平衡扭矩为17.7 N·m.     

PA6/ABS共混物性能研究

将聚酰胺6（PA6）与市售的丙烯腈-丁二烯-苯乙烯（ABS）树脂共混,制备PA6/ABS共混物。研究了ABS树脂的用量对PA6/ABS共混物力学性能的影响;采用苯乙烯及丙烯腈共聚物（SAN）和ABS粉料熔融共混制得不同胶含量的ABS/SAN共混物。研究了不同胶含量的ABS/SAN共混物对PA6/ABS共混物力学性能的影响。在PA6/ABS/SAN共混物中引入苯乙烯-丙烯腈-马来酸酐共聚（SAM）树脂取代部分SAN树脂,研究了SAM树脂的加入及引入顺序的不同对共混物性能的影响。结果表明, ABS树脂的用量在50%～60%左右时共混物性能最佳。随ABS/SAN共混物胶含量提高,共混物的拉伸强度、弹性模量、弯曲强度和弯曲模量逐渐降低。随SAM树脂替代SAN量增加,共混物的拉伸和弯曲性能先降低后增加。但共混物熔体流动速率降低明显,而SAM树脂的引入顺序对共混物的力学性能影响不大。     

吸附剂及萃取剂对ABS共混物性能的影响

采用熔融共混法制备ABS共混物,利用力学性能测试和热脱附-气相/质谱(TDS-GC/MS)分析手段考察了吸附剂、萃取剂以及真空度对ABS共混物力学性能、熔体流动速率、气味和挥发性有机物(VOC)挥发量的影响。实验结果表明,随着吸附剂、萃取剂和真空度的增加,ABS共混物的气味和总挥发性有机物(TVOC)降低;而吸附剂和萃取剂含量对力学性能几乎没有影响,对熔体流动速率略有影响;另外,随着吸附剂含量的增加,ABS共混物的吸湿性逐渐增大。当吸附剂质量分数达到5%时,放置360 h后,其吸水量提高1倍;在ABS共混物中,当吸附剂和萃取剂质量分数分别为1.0%、1.5%时,共混物的气味强度和舒适度可分别达到3.0级和0级,TVOC的挥发量比挤出后的纯ABS下降了55%。     

ABS／PC／MMA类共聚物Q三元共混体系的性能和形态

本文研究了ABS/PC甲基丙烯酸甲酯(MMA)共聚物Q三元共混物的性能与Q含量的关系,对不同Q含量下共混物的拉伸、冲击、弯曲、耐热、熔体指数等性能进行了测试,并用扫描电镜观察了该三元共混物的形态。结果表明,加入共聚物Q可增加共混体系的相容性,在适当组成下可使共混物的弯曲强度提高到原来的1.7倍,同时其他力学性能有所提高或不受损失;共混物的熔体指数能符合工业生产要求。从经济角度看,Q价格也较低。因而ABS/PC/Q三元共混物可望开发为具有重要实际意义的塑料合金。     

增容剂含量对PC/ABS共混物流变行为的影响

采用XLY-II型毛细管流变仪研究了聚碳酸酯/丙烯腈/丁二烯/苯乙烯(PC/ABS)共混物的流变特性。实验结果表明:PC/ABS共混物为假塑性流体,呈现出切力变稀的现象。增容剂的加入使得PC/ABS共混物的表观粘度增大,并且使得在同一剪切应力下的粘流活化能降低,故熔体的流动性受温度的影响较小。     

Effect of ABS grafting degree and compatibilization on the properties of PBT/ABS blends

Blends of PBT/ABS and PBT/ABS compatibilized with styrene‐acrylonitrile‐glycidyl methacrylate (SAG) copolymer were prepared by melt blending method. Grafting degree (GD) of ABS influences the morphology and mechanical properties of PBT/ABS blends. ABS can disperse in PBT matrix uniformly and PBT/ABS blends fracture in ductile mode when ABS grafting degree is more than 44.8%, otherwise, agglomeration takes place and PBT/ABS blends fracture in brittle way. On the other hand, the grafting degree of ABS has no obvious influence on the morphology of PBT/ABS blends and PBT/ABS blends fracture in ductile mode when SAG is incorporated since the compatibilization effect. However, PBT/SAG/ABS blends display much lower impact strength values comparing with PBT/ABS when the blends fracture in ductile way. Side reactions in PBT/SAG/ABS blends were analyzed and which were the main reason for the decrease of impact strength of PBT blends. Tensile tests show that the tensile strength and tensile modulus of PBT blends decrease with the increase of ABS grafting degree due to the higher effective volume. PBT/SAG/ABS blends display much higher tensile properties than PBT/ABS blends since the compatibilization effect. POLYM. COMPOS., 28:484–492, 2007. © 2007 Society of Plastics Engineers     

Studies on binary and ternary blends of polypropylene with ABS and LDPE. I. Melt rheological behavior

Studies are presented on melt rheological properties of binary blend of polypropylene (PP) and acrylonitrile–butadiene–styrene terpolymer (ABS), and ternary blend of PP, ABS, and low-den-sity polyethylene (LDPE). Data obtained in capillary rheometer are presented to describe the effect of blending ratio, shear stress, and shear rate on flow properties, melt viscosity, and melt elasticity. At a blend composition corresponding to 10 wt % ABS content, both binary and ternary blends show maximum in melt viscosity accompanied by minimum in melt elasticity. Pseudoplasticity of the melt decreases with increasing ABS content. In ternary blends, LDPE facilitates the flow at low LDPE contents and obstructs the flow at high LDPE contents. Scanning electron microscopic studies are also presented to illustrate the state of dispersion and its variation with blend composition.     

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.     

Effect of functionality levels and compatibility of polycarbonate blends with maleic anhydride grafted ABS

ABS was melt grafted with maleic anhydride at three different levels of 1, 2, and 3 wt %. These three different modified ABSs were melt blended with polycarbonate using a single‐screw extruder to choose a suitable maleic anhydride grafting level on ABS for better performance. For the compatibility study, binary blends of polycarbonate with ABS and maleic anhydride‐grafted ABS were prepared over the entire range of compositions. Compatibility of these blends was studied using a Dynamic Mechanical Analyzer and by Differential Scanning Calorimetry. Both techniques suggest more partial compatibility for modified blend systems. In addition to this, DSC thermograms show multiple peaks between the transition points of ABS fractions and polycarbonate fractions for the polycarbonate/maleic anhydride‐grafted ABS blends. These multiple peaks are characteristic of better partial compatibility with fine microstructure. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2102–2110, 1999     

Application of styrene‐acrylonitrile random copolymer–polyarylate block copolymer as reactive compatibilizer for polyamide and acrylonitrile‐butadiene‐styrene blends

Styrene‐acrylonitrile random copolymer (SAN) and polyarylate (PAr) block copolymer were applied as a reactive compatibilizer for polyamide‐6 (PA‐6)/acrylonitrile‐butadiene‐styrene (ABS) copolymer blends. The SAN–PAr block copolymer was found to be effective for compatibilization of PA‐6/ABS blends. With the addition of 3.0–5.0 wt % SAN–PAr block copolymer, the ABS‐rich phase could be reduced to a smaller size than 1.0 μm in the 70/30 and 50/50 PA‐6/ABS blends, although it was several microns in the uncompatibilized blends. As a result, for the blends compatibilized with 3–5 wt % block copolymer the impact energy absorption reached the super toughness region in the 70/30 and 50/50 PA‐6/ABS compositions. The compatibilization mechanism of PA‐6/ABS by the SAN–PAr block copolymer was investigated by tetrahydrofuran extraction of the SAN–PAr block copolymer/PA‐6 blends and the model reactions between the block copolymer and low molecular weight compounds. The results of these experiments indicated that the SAN–PAr block copolymer reacted with the PA‐6 during the melt mixing process via an in situ transreaction between the ester units in the PAr chain and the terminal amine in the PA‐6. As a result, SAN–PAr/PA‐6 block copolymers were generated during the melt mixing process. The SAN–PAr block copolymer was supposed to compatibilize the PA‐6 and ABS blend by anchoring the PAr/PA‐6 and SAN chains to the PA‐6 and ABS phases, respectively. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2300–2313, 2002     

The effect of compatibilizers and organically modified nanoclay on the morphology and performance properties of poly(acrylonitrile–butadiene–styrene)/polypropylene blends

In this study, poly(acrylonitrile–butadiene–styrene)/polypropylene (ABS/PP) blends with various compositions were prepared by melt intercalation in a twin‐screw extruder. Modifications of the above blends were performed by using organically modified montmorillonite (OMMT, Cloisite 30B) reinforcement as well as two types of compatibilizers, namely polypropylene grafted with maleic anhydride (PP‐g‐MAH) and ABS grafted with maleic anhydride (ABS‐g‐MAH). Increasing the PP content in ABS matrix seems to increase the melt flow and thermal stability of their blends, whereas a deterioration of the tensile properties was recorded. On the other hand, the addition of ABS to PP promotes the formation of the β‐crystalline phase, which became maximum at 30 wt% ABS concentration, and increases the crystallization temperature (T_c) of PP. A tendency for increase of T_c was also recorded by incorporation of the above compatibilizers, whereas the glass transition temperature (T_g) of PP and SAN phase in ABS was reduced. Regarding the Young's modulus, the greatest improvement was observed in pure ABS/PP blends containing organically modified nanoclay. However, in reinforced pure PP, the use of compatibilizers is recommended in order to improve the elastic modulus. The addition of OMMT to noncompatibilized and compatibilized ABS/PP blends significantly improves their storage modulus. POLYM. ENG. SCI., 56:458–468, 2016. © 2016 Society of Plastics Engineers     

Polymer Blends of Nylon-12 and Abs: Synthesis and Characterization

Six different ratios of blends from nylon-12 and acrylonitrile-butadi-ene-styrene (ABS) were prepared by the melt mixing technique. Thermal analysis of these blends were carried out by differential scanning calorimetry and thermogravimetric analysis. It has been observed that the blend ratios such as 70/30 and 60/40 of nylon-12/ABS were more compatible in comparison with other blend ratios. It is evident from the values of glass transition temperature and activation energy. Thermogravimetric analysis shows a decreasing trend of pyrolysis temperature of these blends with the increase in ABS concentration. The melt-flow index and density data are found to indicate better physical and flow characteristics in the blend compared to pure nylon-12.     

Compatibility enhancement of ABS/polycarbonate blends

The effects of blend composition, melt viscosity of poly(acrylonitrile-butadiene-styrene) (ABS), and compatibilizing effect of poly(methyl methacrylate) (PMMA) on mechanical properties of ABS/polycarbonate (PC) blends at ABS-rich compositions were studied. As the content of PC was increased, impact strength and Vicat softening temperature (VST) were increased. As the melt viscosity of ABS was increased near to that of PC, finer distribution of dispersed PC phase and consequent enhanced impact strength and VST were observed. The compatibilizing effect of PMMA can be ascer-tained from the enhanced properties of ¼-inch notch impact strength, VST, tensilestrength, and the morphology observed by a scanning electron microscope. The improved adhesion of the ABS/PC interface by PMMA changed the fracture mechanism and reduced the notch sensitivity of blends. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 533–542, 1998