高光免喷涂ABS/PMMA合金研究进展

综述了高光免喷涂丙烯腈-丁二烯-苯乙烯塑料(ABS)/聚甲基丙烯酸甲酯(PMMA)合金的研究进展,介绍了ABS和PMMA的种类和配比对合金性能的影响,以及增容剂在改善ABS和PMMA界面相容性、提高合金力学性能和表面硬度方面的作用。并介绍了PC等塑料和无机填料等在ABS/PMMA合金中的应用以及对合金性能的影响。     

无机填料在低光泽PC/ABS合金材料的应用研究

研究不同无机填料对PC/ABS合金哑光效果和力学性能的影响。结果表明:无机填料对PC/ABS合金的光泽度影响显著;但随着无机填料添加量提高,PC/ABS合金的弯曲模量上升,熔体流动速率上升,冲击强度下降。采用表面处理滑石粉的技术方案对合金PC/ABS力学性能影响较小,且使PC/ABS合金的光泽度从15.0降低至4.0,可赋予汽车内饰零件优异的哑光良感官属性。     

ABS／PMMA合金性能的研究

制备了不同配比的ABS/PMMA合金,分别研究了PMMA含量、粘度对合金的缺口冲击强度、拉伸强度、热变形温度、熔体流动速率等性能的影响。结果表明：ABS中引入PMMA可以提高耐热性能;ABS与PMMA共混能提高PMMA的力学性能特别是缺口冲击强度,当ABS/PMMA中PMMA为20%时,共混物具有最优的力学性能;一般情况下,ABS/PMMA合金的流动性介于ABS和PMMA的流动性之间,采用高粘度PMMA的合金性能较佳。     

碳酸钙和滑石粉对PVC/ABS合金性能的研究

研究了无机填料粒状碳酸钙(CaCO3)和片状滑石粉(Talc)对聚氯乙烯(PVC)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金的力学性能、维卡软化温度和加工性能的影响,SEM观察PVC/ABS合金的冲击断面微观形貌和无机填料的分散情况。结果表明,CaCO3和Talc复配可以改善PVC/ABS合金的冲击性能和拉伸性能;Talc可以大幅度的提高PVC/ABS合金维卡软化温度;CaCO3和Talc复配不利于PVC/ABS合金维卡软化温度和加工性能的提高。     

ABS/PMMA合金组成与性能的研究

对ABS和PMMA合金的组成与性能进行了较详细的研究。内容包括:ABS和PMMA共混物的塑化行为的研究;并对ABS和PMMA合金的组成及各项力学性能之间的关系进行了一系列的研究,研究结果表明:不同ABS、PMMA及ABS与PMMA的配比对ABS/PMMA合金的各项性能有较大的影响。当PMMA含量达到40%时,ABS2/PMMA2合金的表面光洁度由82%提高到3%;ABS1/PM MA2合金的拉伸强度由44 8MPa提高到55 3MPa,但冲击强度由118J/m降到57J/m。     

ASA/PMMA合金的制备及性能研究

采用熔融共混的方法制备了丙烯腈-苯乙烯-丙烯酸酯三元共聚物(ASA)/聚甲基丙烯酸甲酯(PMMA)合金。研究了滑石粉(Talc)、聚四氟乙烯(PTFE)以及铝粉含量对ASA/PMMA合金力学性能、光泽度、熔体质量流动速率(MFR)等性能的影响。结果表明,加入滑石粉、铝粉能够提高ASA/PMMA合金的拉伸强度、弯曲强度和硬度,但降低合金的冲击强度;少量的聚四氟乙烯能够增强合金的冲击强度;添加滑石粉、PTFE及铝粉不利于提高合金的光泽度和流动性能。     

EMA在ABS/PMMA合金中的作用

通过DSC、SEM和力学性能测试研究了EMA在ABS/PMMA中的作用,结果表明:EMA对ABS/PMMA合金具有增容和增韧作用。因为EMA含有与ABS中丁二烯结构相似的乙烯基,又含有与PMMA中相同的甲基丙烯酸甲酯,可以提高ABS/PMMA的界面相容性,但同时EMA在ABS/PMMA中呈球形分散,起应力集中物作用,能提高ABS/PMMA的韧性;EMA对ABS/PMMA增容程度影响着ABS/PMMA合金的表面光泽度,当EMA质量含量为6%时,ABS/PMMA合金的表面光泽度达到最大值。     

高光耐划伤ABS材料制备与性能研究

通过熔融共混的方法制备了丙烯腈-丁二烯-苯乙烯(ABS)/聚碳酸酯(PC)、ABS/聚甲基丙烯酸甲酯(PMMA)和ABS/苯乙烯-丙烯腈(SAN)三种合金,并分析了三组合金的光泽度、表面硬度及力学性能。结果发现,ABS/SAN体系具有最佳的表面光泽度和刚性,同时具有良好的表面耐划伤性和冲击韧性。然后进一步探讨了光亮润滑剂(TAF)、乙撑双硬脂酰胺(EBS)及硅酮粉三种润滑剂对ABS/SAN合金表面光泽度和硬度影响,发现添加TAF时具有最佳效果。     

高无机填料含量下PVC/ABS合金性能

通过挤出共混工艺,分别将3种无机填料,滑石粉(Talc)、碳酸钙(CaCO3)、凹凸棒土(Attap)加入到PVC/ABS合金中,制得了3种不同的PVC/ABS合金。研究在无机填料含量较高(60份)的情况下,ABS对PVC/ABS合金耐热性能、力学性能及加工性能的影响。结果发现:与未加无机填料的PVC/ABS合金相比,ABS对合金力学性能的影响不再明显,而维卡软化温度提高了很多;3种无机填料中,PVC/ABS/CaCO3合金综合性能最好,PVC/ABS/Talc合金其次,PVC/ABS/Attap合金最差,当PVC含量为100份,ABS含量为60份,CaCO3为60份时,所得PVC/ABS/CaCO3合金维卡软化温度和冲击强度分别为97.4℃、10.79 kJ/m2,与纯PVC相比分别提高了约13℃和6.79 kJ/m2。     

阻燃高光泽PC/ABS合金的制备

制备了高光泽聚碳酸酯(PC),丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金,用TiO2和磷酸酯改善合金的表面硬度和阻燃性能;用甲基丙烯酸缩水甘油酯、丙烯酸树脂和乙烯的三元共聚物,乙烯-丙烯酸甲酯共聚物(1125AC),苯乙烯接枝马来酸酐共聚物(SMA)作相容剂改善PC/ABS合金的相容性;通过测试合金的光泽度和表面硬度探...     

无机填料改性ABS树脂的研究

将经过表面改性后的无机粒子填充改性ABS。通过力学性能、熔体流动速率、维卡软化点等性能的表征,考察各种常用的无机填料对ABS的改性效果。实验结果表明,由于纳米碳酸钙的“小尺寸效应”及“表面效应”等特殊效应,用其填充改性的ABS具有良好的综合性能。     

Miscible and immiscible blends of ABS with PMMA. II. Mechanical and surface properties

Mechanical and surface properties of injection-molded specimens for miscible and immiscible blends of ABS with PMMA were investigated. Regardless of miscibility, hardness, modulus, and strength of the blends generally showed a smooth variation with composition, with the possible exception of impact strength. In miscible blends, impact strength decreased smoothly with PMMA; however, in immiscible blends, a drastic drop to less than the half that of ABS was obtained at 10 wt % PMMA. Compounding at higher temperature gave decreased modulus and strength and increased impact strength. Surface gloss decreased with PMMA addition in the miscible system and increased in the immiscible system up to 50 wt % PMMA. From contact-angle and FTIR measurements, it is suggested that the surface properties are governed by miscibility and the viscosity ratio of the components. © 1993 John Wiley & Sons, Inc.     

成型温度对PP和ABS试样表面颜色和光泽度的影响

以K31皮纹为例,研究了成型温度对聚丙烯(PP)和丙烯腈-丁二烯-苯乙烯塑料(ABS)试样表面颜色和光泽度的影响。结果表明,随着模具温度和熔体温度的升高,无论是PP还是ABS,其试样颜色的L值均呈增加趋势而光泽度均呈降低趋势,且ABS试样的光泽度降低程度比PP试样高。注塑温度和模具温度升高,材料的流动性提高,冷却时间延长,试样复制模具皮纹的能力提高,使得PP和ABS试样表面皮纹深度均有所增加,从而使试样的光泽度降低、同时L值升高。与PP结晶型材料不同,ABS作为非结晶型材料,其流动性受温度影响更为显著,随着成型温度的升高,使得ABS试样的光泽度降低的程度更大。     

ABS与MBS复配对PVC/滑石粉合金性能的影响

研究了丙烯腈-丁二烯-苯乙烯共聚物(ABS)与甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)复配对聚氯乙烯(PVC)/滑石粉合金耐热性能和力学性能的影响,同时比较了滑石粉经硅烷偶联剂改性前后合金性能的差异,并通过SEM观察分析了合金的冲击断面微观形貌和填料的分散情况。结果表明:ABS/MBS中各组分含量若发生改变,则会对合金的耐热性能和力学性能均产生较大的影响;改性后的滑石粉更有助于提高合金的耐热性能和力学性能。     

Effects of mold cavity temperature on surface quality and mechanical properties of nanoparticle‐filled polymer in rapid heat cycle molding

Acrylonitrile‐butadiene‐styrene (ABS)/poly methyl methacrylate (PMMA) and ABS/PMMA/nano‐CaCO₃ composites were prepared in a corotating twin screw extruder. Single‐gate and double‐gate samples were molded based on a rapid heat cycle molding (RHCM) system. Effects of mold cavity temperature on surface quality and mechanical properties of single‐gate and double‐gate samples in RHCM process were conducted. The results showed that surface quality of plastic parts can be improved significantly by increasing mold cavity temperature. Nano‐CaCO₃ particles on the surface of plastic parts can be eliminated by using high mold cavity temperature. The roughness and gloss of two kinds of plastic parts (ABS/PMMA and ABS/PMMA/nano‐CaCO₃) stabilized at the same level when the mold cavity temperature is above glass transition temperature of resin material. Weld line can be eliminated in RHCM process during high mold cavity temperature. The tensile strength of both ABS/PMMA and ABS/PMMA/nano‐CaCO₃ exhibited decreasing trend with the increase of mold cavity temperature. Reduction of internal stress gave rise to the increase of Izod impact strength of ABS/PMMA for both sing‐gate and double‐gate samples. However, influence regularity of mold cavity temperature on Izod impact strength of ABS/PMMA/nano‐CaCO₃ is depended on the number of gates. For all the samples in this study, too high of mold cavity temperature (higher than 125°C) deprave Izod impact strength of plastic parts. Both ABS/PMMA and ABS/PMMA/nano‐CaCO₃ are not susceptible to weld line. When the mold surface temperature is approximately equal to glass transition temperature of resin material, all the samples are found to give the best combination of properties. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41420.     

PVC/ABS合金性能研究

对软质聚氯乙烯(PVC)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金的力学性能、加工性能进行了测试,并利用差示扫描量热仪和扫描电镜对试样断面结构以及两相的相容性进行了表征。结果表明:随着ABS含量的增加,PVC/ABS合金的相容性和加工性得到改善;当ABS含量在20~30份时,随着ABS含量的增加,合金的断裂伸长率、拉伸强度都有适当的提高。     

SBS增韧回收ABS改性研究

利用聚甲基丙烯酸甲酯(PMMA)及丙烯腈-苯乙烯共聚物(AS)对丁二烯-苯乙烯-丁二烯(SBS)增韧的回收丙烯腈-丁二烯-苯乙烯塑料(ABS)进行改性以提高其表面硬度.研究结果表明,PMMA及AS在提高共混物表面硬度的同时还可以提高其拉伸强度、弯曲强度及硬度,而冲击强度则呈下降趋势;此外,添加PMMA的共混体系的各项力...