共查询到19条相似文献,搜索用时 125 毫秒
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SAM树脂对PC/ABS合金的改性研究 总被引:1,自引:0,他引:1
采用苯乙烯-丙烯腈-马来酸酐三元共聚物(SAM树脂)代替PC/ABS合金中的部分SAN树脂,研究了SAM树脂在SAN树脂中的含量对不同胶含量的PC/ABS合金性能的影响。结果发现,用SAM树脂代替一部分SAN树脂后,PC/ABS合金的冲击强度和断裂伸长率随SAM树脂用量的增加略有增加,合金的拉伸屈服强度基本不变,熔体流动速率降低。SAM树脂引入后,PC/ABS合金的综合性能变化不大,共聚马来酸酐的引入并没有起到增容作用,部分性能的提高是由于SAM树脂与SAN树脂的分子特性不同引起的。 相似文献
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谭志勇;李丹;刘庆辉;阙盼;吴广峰 《中国塑料》2012,26(1):35-40
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。 相似文献
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利用叶片挤出机制备回收PC/回收ABS共混材料,研究叶片挤出机的加工特性对共混体系的作用,分析了苯乙烯/马来酸酐共聚物(SMA-700)、苯乙烯/丙烯腈/马来酸酐三元共聚物(SMA-800)以及ABS接枝马来酸酐(ABS-g-MAH)这3种相容剂对共混物的力学性能、耐热性、熔体指数及形态结构的影响。结果表明:叶片挤出机能有效促进回收ABS相在回收PC基体中的细化分散,适当用量的相容剂能有效提高共混体系的相容性,增强界面粘结力,SMA-700、SMA-800和ABS-g-MAH添加量分别为6%、2%、6%时共混体系的综合性能最佳。 相似文献
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相容剂种类对PA6/ABS合金性能的影响 总被引:1,自引:1,他引:0
采用苯乙烯-马来酸酐(SMA)、苯乙烯-丙烯腈-马来酸酐(SAMAH)和苯乙烯-丙烯腈-甲基丙烯酸(SAMAA)三种共聚物增容尼龙6/丙烯腈-丁二烯-苯乙烯共聚物(PA6/ABS)共混物,利用双螺杆挤出机制备出PA6/ABS合金,对其结构及其性能进行了表征和探讨。结果表明,三种相容剂均可有效地增容PA6/ABS合金,改善ABS在PA6中的分散,大幅度提高了缺口冲击强度;通过差示扫描量热(DSC)分析发现PA6/ABS的结晶度降低,结晶速率变慢;同时通过流变实验发现PA6/ABS共混物为假塑性流体,三种相容剂均提高了其表观黏度。 相似文献
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Relationship between the interfacial tension and compatibility of polycarbonate and poly(acrylonitrile–butadiene–styrene) blends with reactive compatibilizers 下载免费PDF全文
We studied the morphological, mechanical, and rheological properties of polycarbonate (PC) and poly(acrylonitrile–butadiene–styrene) (PolyABS) blends with different types of compatibilizer. Styrene–acrylonitrile–maleic anhydride terpolymer (SAM) was used as a compatibilizer of the blends. For comparison, styrene–acrylonitrile–glycidyl methacrylate terpolymer (SAG) was also used as a compatibilizer. For the PC–PolyABS (70/30 wt %) blends with SAM, the mechanical strength and complex viscosity reached a maximum when the SAM concentration was 5 phr. The mechanical and rheological results of the blend were consistent with the morphological result that the PolyABS domain size reached a minimum when the SAM content was 5 phr. The interfacial tension (α) of the blend was compared with the compatibilizer type and content, which were calculated by the Palierne emulsion model with the relaxation time of the PC–PolyABS blend. The α is consistent with the morphological and mechanical properties of the PC–PolyABS blend. The results of the morphological, mechanical, and rheological properties of the blend suggest that SAM was a more effective compatibilizer than SAG, and the optimum compatibilizer content of SAM was 5 phr. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46418. 相似文献
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Yongxiao Lian Yong Zhang Zhonglin Peng Xiangfu Zhang Ruliang Fan Yinxi Zhang 《应用聚合物科学杂志》2001,80(14):2823-2832
A new kind of blends of polyvinyl chloride (PVC)/nylon terpolymer was reported in this article. Two compatibilizers were used in this study: one is a terpolymer of ethylene–n‐butyl acrylate–monoxide (EnBACO); the other is terpolymer of EnBACO grafted with maleic anhydride (EnBACO‐g‐MAH). The observation of scanning electron microscope (SEM) reveals that the PVC/nylon terpolymer blends have a two‐phase structure; and the nylon terpolymer phase is the continuous phase, and PVC domains in the PVC/nylon terpolymer/EnBACO‐g‐MAH blends have fine dispersion over a broad range of the PVC/nylon terpolymer ratio. EnBACO‐g‐MAH is more compatible with the nylon terpolymer than EnBACO. EnBACO and EnBACO‐g‐MAH have different effects on the glass transition temperatures of the PVC phase and nylon terpolymer phase in the blends. The notched Izod impact strength, tensile strength, elongation at break, Vicat softening temperature (VST), and melt flow index (MFI) critically depend on PVC/nylon terpolymer ratio, the kinds and concentration of the compatibilizers. The PVC/nylon terpolymer/EnBACO‐g‐MAH blends display a good combination of high toughness, high flowability, and high VST under low load. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2823–2832, 2001 相似文献
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This study focuses on the preparation of compatible blends with the poly(methyl methacrylate) (PMMA) using a reactive terpolymer maleic anhydride–styrene–vinyl acetate (MA–St–VA). In the first series of experiments, binary blends of the PMMA and the MA–St–VA terpolymer have been prepared in tetrahydrofurane. The PMMA and the MA–St–VA terpolymer formed the compatible blends. The effects on thermomechanical properties of MA–St–VA terpolymer ratio in the blends were studied. The glass transition temperatures (Tg), thermal expansion coefficient (α), and other thermomechanical parameters for the blends have been established by TMA method and the compatibility of two polymers has been evaluated by these TMA parameters. The addition of MA–St–VA terpolymer to PMMA made a plasticizing effect on PMMA. This effect regularly changed with the increasing of the terpolymer in the blends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 363–367, 2006 相似文献
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In this investigation, the effects of blending with ethylene–propylene–diene terpolymer and subsequent dynamic curing with sulfur on the macromolecular structure and properties of pure low‐density polyethylene and high‐density polyethylene were studied. The crosslinking efficiency of polyethylene‐based ethylene–propylene–diene terpolymer blends upon dynamic curing was assessed with torque and gel content measurements. The curing of dispersed ethylene–propylene–diene terpolymer in a polyethylene matrix improved both the mechanical and thermomechanical properties as a result of the formation of a crosslink structure in the rubber phase. In view of the electrical applications of this cured blend material, the volume resistivity was measured. The thermal stability of vulcanized polyethylene/ethylene–propylene–diene terpolymer blends was found to be superior to that of unvulcanized blends. In scanning electron microscopy analysis, good interface bonding between the polyethylene matrix and dispersed ethylene–propylene–diene terpolymer was observed for the cured blends. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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Liting Yang Guodong Liu Donghai Sun Weina Wang Jungang Gao Liucheng Zhang Riguang Jin 《乙烯基与添加剂工艺杂志》2002,8(2):151-158
Three kinds of terpolymers containing N-phenylmaleimide (PhMI) were synthesized by emulsion polymerization. The terpolymers were used as heat-resistant modifiers, and acrylic-core/shell (ACR) was used as an impact modifier in blends with PVC. The mechanical properties and rheological behavior of the blended systems were determined. The results showed that the mechanical properties of the blends improved with increasing terpolymer content and that the apparent melt viscosity of the blends decreased with increasing terpolymer content. When 8 phr of ACR was added to the blended system, the mechanical properties and the apparent melt viscosity were greatly improved. 相似文献
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The influence of the functional groups concentrations on the reactive compatibilization of polybutylene terephthalate (PBT)/epoxide-containing rubber blends has been investigated by using various PBT and ethene-(methyl acrylate)-(glycidyl methacrylate) terpolymer (E-MA-GMA) grades. The reactivity of the rubber phase was modified using different strategies, including the use of commercial terpolymer grades, modification of E-MA-GMA or diluting E-MA-GMA terpolymers with non-reactive ethene-(methyl acrylate) (E-MA) copolymer. The reactive blends were analyzed amongst others by electron microscopy and fractionation experiments. It was shown that the final particle size is directly related to the amount of copolymer formed in situ at the blend interface, i.e. chain area density Σ. A value of approximately 0.05 chains/nm2 for Σ is necessary to suppress dynamic coalescence and to obtain very fine dispersion (<0.2 μm). This requires a sufficiently high concentration in reactive functions at the interface vicinity. In this context, the time required for equilibrium morphology is rather independent of the GMA content in the terpolymer but is, however, intimately related to the PBT chain ends concentration. Investigation of PBT/(E-MA-GMA/E-MA) ternary blends revealed unambiguously that the formation of the copolymer at the interface is not controlled by the diffusion of the reactive chains towards the interface. The performed experiments offer new opportunities for modulating the final morphology and the properties of the PBT/rubber blends. 相似文献
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The emulsion terpolymerization of methyl methacrylate (MMA), ethyl acrylate (EA), and acrylic acid (AA) was carried out under a nitrogen atmosphere at 70°C. The final terpolymer conversion was determined gravimetrically. The synthesized MMA–EA–AA terpolymer was characterized with 1H‐NMR spectroscopy, thermal analysis, and gel permeation chromatography. Glass‐transition temperatures of the MMA–EA–AA terpolymer were determined with a differential scanning calorimeter. Ethylene–propylene–diene monomer rubber (EPDM)/poly(vinyl chloride) (PVC) blends were prepared with different blend ratios (10/90, 20/80, 30/70, 40/60, and 50/50) in the presence and absence of MMA–EA–AA as a compatibilizer. The morphology of those blends was examined with the aid of a scanning electron microscope. The scanning electron micrographs in the presence of the MMA–EA–AA terpolymer illustrated the disappearance of the macroscale phase separation of EPDM/PVC blends as a result of the incorporation of MMA–EA–AA into that blend, indicating an improvement of the homogeneity. The mechanical properties of the EPDM/PVC blend films and the dielectric properties of the melt blends were investigated. The swelling behavior of the cured blends in the brake fluid was also discussed. The results illustrated that the mechanical properties, the weight swelling values, and the dielectric constant values showed linear behavior versus the blend ratios after the incorporation of the terpolymer. However, those values showed deviations from linearity in the absence of the terpolymer. That, in turn, ensured the results obtained with the scanning electron microscope. The results reveal that the MMA–EA–AA terpolymer prepared can be used successfully to improve the homogeneity of EPDM/PVC blends used in hose and oil seal applications. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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Biaxially oriented films of blends of high-density polyethylene (HDPE) with polypropylene (PP) homopolymer and PP copolymers prepared by twin-screw extrusion and lab-stretcher have been investigated by scanning electron microscopy (SEM), polarized microscopy, differential-scanning calorimeter, and universal testing machine. Three different kinds of PP copolymers were used: (i) ethylene–propylene (EP) random copolymer; (ii) ethylene–propylene (EP) block copolymer; (iii) ethylene–propylene–buttylene (EPB) terpolymer. In the SEM study of the morphology of films of HDPE with various PP blends, phase separation is observed between the PP phase and the HDPE phase for all blends and compositions. In all blends, HDPE serves to reduce the average spherulites size, probably acting as a nucleating agent for PP. The reduction of spherulite size appeared most significantly in the blend of EPB terpolymer and HDPE. A large increase of crystallization temperature was found in the blend of EPB terpolymer and HDPE compared with the unblended EPB terpolymer. For the blend of EPB terpolymer and HDPE, the improvement of tensile strength and modulus is observed with an increase of HDPE content, and this can be considered as a result of the role of HDPE in reducing average spherulite size. © 1994 John Wiley & Sons, Inc. 相似文献
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Summary Morphology and thermal characteristics of poly (trimethylene terephthalate) (PTT)/ metallocene linear low-density polyethylene (m-LLDPE) blends with different amounts of a terpolymer based on glycidyl methacrylate (GMA), employed as a possible compatibilizer, were systematically examined. DMTA results show two distinct peaks for all neat blends associated with each phase. Melt crystallization degree of both phases in all the blends was observed to be reduced compared to pure components, except for that of PTT-rich phase in those blends with PTT as the matrix which slightly increases. Addition of the terpolymer to the system is found to effectively reduce the droplet size of the dispersed phase and increase phase adhesion. Also it increases the crystallinity of PTT in the system with PTT as the matrix. The influence of the compatibilizer is ascribed to the chemical interaction of PTT functional end groups with GMA functionalities. The efficiency of the terpolymer as a compatibilizer beyond 5 wt% content decreases which can be ascribed to the interface saturation and formation of micelles in the bulk phases. 相似文献