ABS/PET合金的相容性研究

选用甲基丙烯酸甲酯-丁二烯-苯乙烯接枝共聚物(MBS)、KT-18和KT-5A作为丙烯腈-丁二烯-苯乙烯共聚物(ABS)/聚对苯二甲酸乙二醇酯(PET)的增容剂,通过双螺杆挤出机共混制得综合性能优良的合金,探讨了ABS和PET的配比、增容剂用量、增容剂种类对合金性能的影响。结果表明,PET在合金中的比例为20%~30%(质量分数,下同)时,合金的力学性能较好;选用KT-18的增容效果最好,使ABS/PET合金的冲击强度可达到8.79kJ/m2;增容剂KT-18的最佳用量为3%~5%。     

不同增容剂对PET/ABS合金性能的影响

研究了不同增容剂对PET/ABS合金的增容效果,采用苯乙烯-马来酸酐共聚物(SMA)、苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯共聚物(SAG)、乙烯-丙烯酸正丁酯-缩水甘油酯共聚物(PTW)为增容剂,考察了其增容效果,结果表明,SMA对PET/ABS的增容效果最好,SAG对PET/ABS的增容效果次之,PTW对PET/ABS的增容效果不好。考察了增韧剂对PET/ABS合金性能的影响。结果表明,具有核壳结构的甲基丙烯酸甲酯-丁二烯-苯乙烯(MBS)对PET/ABS合金具有优异的增韧效果,为实现PET/ABS合金的产业化打下了基础。     

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 %。     

ABS/PET合金的组成配比及SMA的增容化研究

以苯乙烯接枝马来酸酐共聚物(SMA)为增容剂对丙烯睛-丁二烯-苯乙烯共聚物(ABS)/聚对苯二甲酸乙二醇酯(PET)共混物进行研究,探讨了SMA用量对合金的力学性能和热稳定性的影响;并进一步研究了无增容剂下ABS与PET之间配比对合金性能的影响.研究表明:增容剂SMA用量为10 phr时,合金的冲击强度和断裂伸长率分别提高20%和50%;随着PET用量的增加,合金的弯曲强度、拉伸强度和维卡软化温度不断提高,当PET用量接近50%时发生相转变;断裂伸长率在PET的质量分数为30%时达到最低(32%).通过示差扫描量热法(DSC)测试,发现ABS破坏了PET的结晶行为,且合金中两者的玻璃化转变温度存在重合现象.通过扫描电子显微镜(SEM)和偏光显微镜观察发现,SMA增容的ABS/PET合金中PET颗粒尺寸较小且分散较好;PET晶粒在ABS中可以形成"岛"相和连续相.     

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。     

无卤阻燃PC/ABS合金的研制

研究了增容剂苯乙烯-丁二烯-马来酸酐共聚物(MPC 1545R)、四苯基双酚A二磷酸酯(BDP)与磷酸三苯酯(TPP)复配阻燃剂及不同螺杆组合工艺对聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯塑料(ABS)合金性能的影响。通过扫描电子显微镜分析了PC/ABS合金的微观结构。结果表明,MPC 1545R对PC/ABS合金起到了较好的增容效果,单一BDP阻燃剂,BDP与TPP复配阻燃剂均可显著提高PC/ABS合金的阻燃性能,BDP与TPP复配阻燃剂的阻燃效果比单一阻燃剂BDP好,当PC,ABS,MPC 1545R,BDP和TPP用量分别为70,30,5,10,3.5份时,制备的无卤阻燃PC/ABS合金的极限氧指数为27.9%、阻燃等级为UL94 V-0级,综合力学性能最好。适当地降低螺杆的剪切强度,提高螺杆的分散能力,可以获得力学、阻燃性能及外观较好的阻燃PC/ABS合金。     

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。     

PET/ABS合金的制备及其相容性

采用苯乙烯-马来酸酐共聚物(SMA)、苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯共聚物(SAG)、乙烯-丙烯酸正丁酯-缩水甘油酯共聚物(PTW)为相容剂,研究了不同相容剂对聚对苯二甲酸乙二醇酯(PET)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金的增容效果。结果表明:相容剂对PET/ABS合金的增容效果中,SMA最好,SAG次之,PTW较差。考察了增韧剂对PET/ABS合金性能的影响。结果表明,具有核壳结构的甲基丙烯酸甲酯-丁二烯-苯乙烯(MBS)对PET/ABS合金具有优异的增韧效果;考察了PET和ABS之间的相容性,结果表明,相容剂提高了PET与ABS的相容性。     

PTT复合材料力学性能研究进展

介绍了聚对苯二甲酸丙二醇酯(PTT)的结构特征、生产研究现状、有关的性能优势及其发展前景.给出了成核剂、增容共混物对PTT结晶性能的影响,以及聚丙烯(PP)、玻璃纤维(GF)、聚萘二甲酸乙二醇酯(PEN)短纤维、丙烯腈-丁二烯-苯乙烯(ABS)分别与PTT增容共混后力学性能的变化.可以看出,GF对PTT力学性能的提高很显著,能同时增韧增强,加入成核剂、增韧剂和PBT后进一步提高其部分力学性能,且改善了加工性能.PTT/ABS-g-MAH力学性能增加幅度比GF/PTT还要大,加入玻纤后性能进一步增强.     

Epoxy/acrylonitrile-butadiene-styrene copolymer/clay ternary nanocomposite as impact toughened epoxy

Epoxy resins have low impact strength and poor resistance to crack propagation, which limit their many end use applications. The main objective of this work is to incorporate both acrylonitrile-butadiene-styrene copolymer (ABS) and organically modified clay (Cloisite 30B) into epoxy matrix with the aim of obtaining improved material with the impact strength higher than neat epoxy, epoxy/clay and epoxy/ABS hybrids without compromising the other desired mechanical properties such as tensile strength and modulus. Impact and tensile properties of binary and ternary systems were investigated. Tensile strength, elongation at break and impact strength were increased significantly with incorporation of only 4 phr ABS to epoxy matrix. For epoxy/clay nanocomposite with 2.5% clay content, tensile modulus and strength, and impact strength were improved compared to neat epoxy. With incorporation of 2.5% clay and 4 phr ABS into epoxy matrix, 133% increase was observed for impact strength. Ternary nanocomposite had impact and tensile strengths greater than values of the binary systems. Morphological properties of epoxy/ABS, epoxy/clay and epoxy/ABS/clay ternary nanocomposite were studied using atomic force microscopy (AFM) phase imaging, scanning electron microscopy (SEM) and wide angle X-ray diffraction (WAXD). New morphologies were achieved for epoxy/ABS and epoxy/ABS/clay hybrid materials. Exfoliated clay structure was obtained for epoxy/clay and epoxy/ABS/clay nanocomposite.     

Melting and crystallization behaviors of compatibilized poly(trimethylene terephthalate)/acrylonitrile–butadiene–styrene blends

The melting and crystallization behaviors of poly(trimethylene terephthalate) (PTT)/acrylonitrile–butadiene–styrene (ABS) blends were investigated with and without epoxy or styrene–butadiene–maleic anhydride copolymer (SBM) as a reactive compatibilizer. The existence of two separate composition-dependent glass-transition temperatures (T_g's) indicated that PTT was partially miscible with ABS over the entire composition range. The melting temperature of the PTT phase in the blends was also composition dependent and shifted to lower temperatures with increasing ABS content. Both the cold crystallization temperature and T_g of the PTT phase moved to higher temperatures in the presence of compatibilizers, which indicated their compatibilization effects on the blends. A crystallization exotherm of the PTT phase was noticed for all of the PTT/ABS blends. The crystallization behaviors were completely different at low and high ABS contents. When ABS was 0–50 wt %, the crystallization process of PTT shifted slightly to higher temperatures as the ABS content was increased. When ABS was 60 wt % or greater, PTT showed fractionated crystallization. The effects of both the epoxy and SBM compatibilizers on the crystallization of PTT were content dependent. At a lower contents of 1–3 wt % epoxy or 1 wt % SBM, the crystallization was retarded, whereas at a higher content of 5 wt %, the crystallization was accelerated. The crystallization kinetics were analyzed with a modified Avrami equation. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

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。     

Synthesis of functionalized copolymers and their compatibilization effects on acrylonitrile butadiene styrene/poly(butylene terephthalate) blends

In this study, the copolymers of methyl methacrylate-co-glycidyl methacrylate (MGD) with different epoxy contents and molecular weights, the styrene-co-glycidyl methacrylate (SGD) and methyl methacrylate-co-maleic anhydride (MAD) were synthesized. The synthesized copolymers, styrene-co-maleic anhydride (SMA) and styrene-acrylonitrile-co-glycidyl methacrylate (SAG) were used as compatibilizers to enhance the impact strength of the acrylonitrile butadiene styrene/poly(butylene terephthalate) (ABS/PBT). The effects of differences in the structure, reactive group type, and molecular weight of the compatibilizers on the mechanical properties, phase morphology, melt viscosity, thermal stability, and melting temperature of the blend were studied. The results showed that functionalized copolymers were successfully synthesized with high monomer conversions. Addition of the functionalized copolymers increased melt viscosity but did not considerably affect thermal stability, tensile strength, flexural strength and melting temperature of the ABS/PBT blends. The compatibilizers improved the dispersion of the PBT phase and prevented brittle fracture, thereby increasing the impact strength of the blend. Among the studied compositions, the ABS/PBT/MGD-5 blend exhibited the highest impact strength of 25.8 kJ/m² and an appropriate melt flow index of 19.1 g/10 minutes. The compatibilizer should have an appropriate molecular weight to improve the interface bonding force. Regarding the melting viscosity, the reactive group content and compatibilizer dosage should be adjusted to ensure high impact strength.     

PC及PC/ABS合金的增韧研究

研究了增韧剂SWR-7A对PC及PC／ABS增韧效果。比较了增韧剂SWR-7A与美国增韧剂GE-338及国内外其它增韧剂的增韧效果。研究表明，加入SWR-7A在提高PC及PC／ABS共混体系的冲击强度的同时，拉伸强度、弯曲强度及弯曲模量降低较少，达到了优化材料性能的目的，SWR-7A是一种理想的增韧剂。     

Effect of the compatibilizer on the morphology and properties of dynamically cured PP/POE/epoxy blends

Dynamic vulcanization was successfully applied to epoxy resin reinforced polypropylene (PP)/ethylene‐octene copolymer (POE) blends, and the effects of different compatibilizers on the morphology and properties of dynamically cured PP/POE/epoxy blends were studied. The results show that dynamically cured PP/POE/epoxy blends compatibilized with maleic anhydride‐grafted polypropylene (MAH‐g‐PP) have a three‐phase structure consisting of POE and epoxy particles dispersed in the PP continuous phase, and these blends had improved tensile strength and flexural modulus. While using maleic anhydride‐grafted POE (MAH‐g‐POE) as a compatibilizer, the structure of the core‐shell complex phase and the PP continuous phase showed that epoxy particles could be embedded in MAH‐g‐POE in the blends, and gave rise to an increase in impact strength, while retaining a certain strength and modulus. DSC analysis showed that the epoxy particles in the blends compatibilized with MAH‐g‐PP were more efficient nucleating agents for PP than they were in the blends compatibilized with MAH‐g‐POE. WAXD analysis shows that compatibilization do not disturb the crystalline structure of PP in the blends. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

The effect of graft copolymers of maleic anhydride and epoxy resin on the mechanical properties and morphology of PP/ABS blends

In this work, maleic anhydride‐grafted polypropylene (PP‐g‐MAH) and maleic anhydride‐grafted poly(acrylonitrile‐butadiene‐styrene) (ABS‐g‐MAH) at 2 : 1 mass ratio were added as a compatibilizer in the PP/ABS blends. The compatibilizing effect was evaluated by adding the graft copolymers together with epoxy resin/imidazole curing agent (E51/2E4MZ). The reaction in reactive extrusion, morphological structure, and properties of PP and ABS blends were investigated by using infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X‐ray spectrum, transmission electron microscope (TEM), dynamic thermomechanical analysis (DMA), differential scanning calorimetry (DSC), and mechanical properties tests. The results showed that the compatibilizing effect was greatly improved because of the addition of the graft copolymers together with epoxy resin/imidazole curing agent (E51/2E4MZ) because the link structure of PP‐g‐MAH and ABS‐g‐MAH was formed by the reaction of anhydride group with epoxy group catalyzed by the imidazole. The size of the dispersed phase decreased dramatically, the interfacial adhesion between ABS particles and PP matrix was improved, and the tensile strength and flexural modulus of the PP/ABS blends increased further. The optimizing properties were obtained at 3 phr E51/2E4MZ. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40898.     

ABS及PS-g-GMA对回收PET的改性研究

以回收聚对苯二甲酸乙二醇(酯rPET)为基体材料,丙烯腈-丁二烯-苯乙烯共聚(物ABS)为增强材料,甲基丙烯酸缩水甘油酯接枝聚苯乙烯(PS-g-GMA)为增容剂,制备了rPET/ABS共混物。采用SEM、DSC等方法对共混物的形态结构、结晶性能和力学性能进行了表征。结果表明:与纯rPET相比,ABS增韧后的rPET缺口冲击强度和断裂伸长率分别提高了54.0%和47.2%,弯曲强度和拉伸强度略有下降,熔融温度下降了1.27℃,结晶温度升高了31.22℃,结晶速度明显加快;PS-g-GMA的加入改善了rPET/ABS共混物的两相界面结合力,细化了两相结构;与纯rPET相比,含1%PS-g-GMA的rPET/PS-g-GMA/ABS共混物的缺口冲击强度提高了72.5%断,裂伸长率提高了71.7%。     

Mechanical properties of blends of nylon with chemically modified ABS

Tensile, flexural and impact properties were measured of a heterogeneous polymer blend system, consisting of nylon 6 and a chemically modified ABS (MABS). It was found from the tensile tests that nylon-richer blends show yielding behaviour and nylon-leaner blends show necking behaviour. The addition of MABS increases the modulus, whereas the tensile strength and percentage elongation at break decrease and go through a minimum. The impact strength is increased to a maximum of approximately three times when 20 wt% of MABS is added to nylon 6. In order to interpolate the mechanical properties observed, empirical equations are given which are found to describe the experimental data rather well. Photomicrographs were taken of the tensile fractured surfaces using a scanning electron microscope.     

Compatibilization of polypropylene/Poly(acrylonitrile‐butadiene‐styrene) blends by polypropylene‐graft‐cardanol

The polypropylene‐graft‐cardanol (PP‐g‐cardanol) was prepared by reactive extrusion with polypropylene (PP) and natural renewable cardanol which could increase the interfacial energy of PP and inhibit the degradation of PP during the process of reactive extrusion and usage. In this article, PP‐g‐cardanol and polypropylene‐graft‐maleic anhydride (PP‐g‐MAH) were used as compatibilizers of the polypropylene (PP)/poly(acrylonitrile‐butadiene‐styrene) (ABS) blends. PP/ABS (70/30, wt %) blends with PP‐g‐cardanol and PP‐g‐MAH were prepared by a corotating twin‐screw extruder. From the results of morphological studies, the droplet size of ABS was minimized to 1.93 and 2.01 μm when the content of PP‐g‐cardanol and PP‐g‐MAH up to 5 and 7 phr, respectively. The results of mechanical testing showed that the tensile strength, impact strength and flexural strength of PP/ABS (70/30) blends increase with the increasing of PP‐g‐cardanol content up to 5 phr. The complex viscosity of PP/ABS (70/30) blends with 5 phr PP‐g‐cardanol showed the highest value. Moreover, the change of impact strength and tensile strength of PP/ABS (70/30) blends were investigated by accelerated degradation testing. After 4 accelerated degradation cycles, the impact strength of the PP/ABS (70/30) blends with 5 phr PP‐g‐cardanol decrease less than 6%, but PP/ABS (70/30) blends with 5 phr PP‐g‐MAH and without compatibilizer decrease as much as 12% and 32%, respectively. The tensile strength of PP/ABS (70/30) blends has a similar tendency to that of impact strength. The above results indicated that PP‐g‐cardanol could be used as an impact modifier and a good compatibilizer, which also exhibited better stability performance during accelerated degradation testing. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41315.