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采用湿法挤出工艺,即将乳液聚合合成的丙烯腈-丁二烯-苯乙烯(ABS)接枝共聚物经凝聚和过滤后得到的ABS接枝共聚物湿粉料与苯乙烯-丙烯腈共聚物(SAN)以一定的比例投入湿法挤出机内挤出造粒,直接获得了ABS树脂。考察了ABS接枝共聚物湿粉料含水量、ABS树脂中橡胶含量、抗氧剂含量、挤出机温度及螺杆转速等因素对ABS树脂力学性能的影响。结果表明,挤出温度过高明显引起物料降解,ABS树脂的冲击强度减小,拉伸强度降低;ABS接枝共聚物湿粉料含水量对ABS树脂的性能没有明显影响;透射电子显微镜分析表明,橡胶粒子在SAN基体中分散均匀;湿法挤出的最佳工艺参数为,挤出温度:180℃,螺杆转速:200 r/min,抗氧剂含量:0.154%(质量分数,下同)。 相似文献
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牛秋生;刘振国;徐刚;张会轩;杨海东 《中国塑料》2011,25(5):55-59
采用湿法挤出工艺,即将乳液聚合合成的经凝聚和过滤的丙烯腈-丁二烯-苯乙烯(ABS)湿粉料与苯乙烯-丙烯腈共聚物(SAN)树脂以一定的比例投入湿法挤出机内挤出造粒,直接获得了ABS树脂。考察了ABS粉料含水量、ABS树脂中橡胶含量、抗氧剂含量、挤出机温度及螺杆转速等因素对ABS树脂力学性能的影响。结果表明,挤出温度过高明显引起物料降解,ABS树脂的冲击强度减小,拉伸强度降低;ABS粉料含水量对ABS树脂的性能没有明显影响;透射电子显微镜分析表明,橡胶粒子在SAN基体中分散均匀;湿法挤出的最佳工艺参数为,挤出温度:180 ℃,螺杆转速:200 r/min,抗氧剂含量:0.154 %(质量分数,下同)。 相似文献
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通过乳液接枝聚合法合成丙烯腈-丁二烯-苯乙烯共聚物(ABS)接枝粉料,与苯乙烯-丙烯腈共聚物(SAN)树脂熔融共混得到ABS树脂。探究丙烯腈含量对ABS树脂性能的影响。结果表明:随着丙烯腈含量增加,ABS树脂的拉伸强度、冲击强度、耗散因数、体积电阻率、维卡软化温度以及两相之间相容性上升,但熔体流动速率、表面电阻率、介电常数下降。 相似文献
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采用乳液聚合技术合成丙烯腈-丁二烯-苯乙烯(ABS)接枝粉料,将制得的ABS接枝粉料与聚甲基丙烯酸甲酯(PMMA)/苯乙烯-丙烯腈共聚物(SAN)熔融共混,制备透明ABS树脂。研究了体系橡胶含量,接枝粉料壳层组成,基体组成对透明ABS树脂结构与性能的影响。结果表明,随着体系橡胶含量的增加,共混物的冲击强度增大,透光率略有降低;壳层组成为75/25的共混物具有较高的韧性和透明性;随着基体PMMA/SAN组成的增加,共混物的冲击强度基本不变,而透光率先增大后减小。透射电子显微镜(TEM)研究表明,壳层组成为75/25的橡胶粒子能均匀地分散在基体中。 相似文献
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将苯乙烯-丙烯腈共聚物接枝聚丁二烯(PB-g-SAN)与苯乙烯-丙烯腈共聚物(SAN)树脂按照一定比例熔融共混制备具有不同橡胶含量的丙烯腈-丁二烯-苯乙烯共聚物(ABS)树脂。研究了不同橡胶含量对ABS树脂的冲击以及拉伸行为的影响,并通过透射电子显微镜研究了ABS树脂的微观形态及形变机理。结果表明,ABS材料的冲击强度随着橡胶含量的增加先升高后降低;断裂伸长率随着橡胶含量的增大而增大;当橡胶含量较少时,橡胶粒子在基体相中发生聚集现象的可能性较小,分散性较好;随着橡胶含量的增加发生聚集现象的可能性增加,粒子分散性变差;随着橡胶粒子含量的增加,ABS树脂的主要增韧机理是由空洞化到银纹再到剪切屈服的转变。 相似文献
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通过将苯乙烯-丙烯腈共聚物(SAN)与不同含有聚丁二烯橡胶成分的丙烯腈-丁二烯-苯乙烯共聚物(ABS)抗冲改性剂共混挤出,制备了一系列不同橡胶组成的ABS材料。系统研究了橡胶含量和橡胶粒径变化对其光泽度、冲击性能、拉伸性能、弯曲性能以及着色性能的影响。结果发现:随着橡胶含量的增加、橡胶粒径的增大,ABS材料的光泽度明显降低,同时材料的拉伸强度、弯曲强度、弯曲模量以及着色后的黑度也随之降低。ABS材料的缺口冲击强度随着橡胶含量的增加逐渐升高,随着橡胶粒径的增大先升高后减小。 相似文献
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Z.Y. Tan X.F. Xu S.L. Sun C. Zhou Y.H. Ao H.X. Zhang Y. Han 《Polymer Engineering and Science》2006,46(10):1476-1484
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. 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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本实验采用胶含量为60%的ABS接枝粉料与SAN树脂以不同比例进行共混,制备了胶含量范围为10%~55%的ABS树脂。将胶含量不同的ABS树脂与PC以30/70、50/50、70/30的比例利用熔融共混技术,制备了组成不同的PC/ABS共混物。利用SEM电镜观察了PC/ABS合金的微观结构。研究表明,ABS树脂含量为30%时,在合金中形成分散相;ABS树脂含量为70%时,形成连续相;ABS树脂含量为50%时与PC形成双连续相结构。在三种结构中,ABS树脂胶含量的增加都使合金的相形态变得更精细。 相似文献
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采用胶含量(质量分数,下同)为60%的丙烯腈-丁二烯-苯乙烯接枝共聚物(ABS)接枝粉料与苯乙烯-丙烯腈共聚物(SAN)以不同比例进行共混,制备了胶含量范围为10%~55%的ABS树脂.将胶含量不同的ABS树脂与聚碳酸酯(PC)以30/70、50/50、70/30的质量比利用熔融共混技术,制备了组成不同的PC/ABS共混物,考察了ABS树脂胶含量对不同组成的PC/ABS合金性能的影响.研究结果表明:随着ABS树脂中胶含量的增加,ABS树脂的冲击强度不断提高,屈服强度、模量及熔体流动速率逐渐降低.随着PC/ABS合金中ABS胶含量的增加,合金的冲击强度显著提高,ABS树脂中胶含量大于30%以后,合金的冲击强度变化不大,且3种组成的PC/ABS合金的冲击强度相差不大.合金的屈服强度、模量及熔体流动速率却随着ABS中胶含量的增加不断降低,其中组成为30/70的PC/ABS合金最低.利用扫描电镜观察了PC/ABS组成为70/30合金的微观结构,研究表明,ABS树脂形成连续相,PC为分散相,随ABS树脂胶含量的增加,合金的相形态变得更精细. 相似文献
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Blends of poly (vinyl chloride) (PVC) and acrylonitrile-butadiene styrene (ABS) terpolymer were prepared in different ratios by a melt blending technique. ABS containing three different levels of rubber content were used. A quantitative assessment of ABS in PVC/ABS blends has been shown by infrared studies. ABS content has been shown as the presence of the characteristic acrylonitrile peak. Differential scanning calorimetry (DSC) studies have been carried out to study the glass transition (Tg) behavior of the blends. Two Tg values corresponding to PVC and styrene-acrylonitrile (SAN) copolymer have been observed. Thermogravimetric analysis (TGA) reveals a significant improvement in thermal stability of these blends as compared to PVC. Mechanical properties show a significant increase in the impact strength which is related to rubber content of the ABS used. Morphological studies have been carried out by scanning electron microscopy which support the observation that an increase in rubber content results in greater ductility. 相似文献
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Zhisheng Yu Yang Li Yurong Wang Li Yang Ying Liu Yongtian Li Zhansheng Li Zhongfu Zhao 《Polymer Engineering and Science》2010,50(5):961-969
Acrylonitrile‐butadiene‐styrene (ABS) resins with various rubber contents were prepared by applying nickel catalyzed high‐cis polybutadiene rubber (BR9004) as toughening agent via bulk polymerization. The influence of rubber content and its characteristics on the morphology, mechanical properties, and fracture mechanisms of ABS resins were investigated. The relevant performance parameters were also evaluated and compared with a commercial injection grade resin (ABS‐8434). The results show that each synthesized resin generally contains some irregular microsized particles with a certain amount of subinclusions besides the analogous “sea‐island” morphology to ABS‐8434. The subinclusions considerably enhance the volume fraction of rubber phase; this leads to an increasing maximum loss tangent (tan δ) value, a decreasing storage modulus and glass transition temperature (Tg) of rubber phase. Besides, the higher grafting degree can not only produce a higher Tg of grafted copolymer but also improve the compatibility of rubber phase with matrix. Based on the performance measurements andfractography, the final product with a rubber content of 9.3% reveals ductile fracture behavior and excellent comprehensive properties far superior to ABS‐8434 due to combined shear yielding and massive crazing. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers 相似文献