短玻纤增强丙烯腈-丁二烯-苯乙烯共聚物的制备及性能

以丙烯腈-丁二烯-苯乙烯共聚物(ABS)及短玻璃纤维(SGF)为原料, 以苯乙烯-马来酸酐共聚物(SMA)和环氧树脂(EP)为界面相容剂, 制备了SGF/SMA-EP-ABS复合材料。用扫描电镜(SEM)、 动态力学热分析(DMTA)等研究了界面相容剂对SGF增强ABS复合材料力学性能及界面粘结性能的影响。结果表明:加入SMA或EP, SGF增强ABS复合材料的力学性能明显提高; SMA与EP同时加入具有明显的协同效果, 使复合材料的性能更为优越。当SGF加入质量分数为30%时, SGF/SMA-EP-ABS复合材料的拉伸强度、 弯曲强度、 冲击强度较未添加界面相容剂时分别提高了56%、 42%、 79%。SEM和DMTA测试表明, 加入SMA和环氧树脂后, SGF与ABS基体之间的界面粘结性能得到很大改善。      

高强玻纤增强ABS复合材料的制备及性能

以丙烯腈-丁二烯-苯乙烯共聚物(ABS)及玻璃纤维(GF)为原料,以苯乙烯-马来酸酐共聚物(SMA)和环氧树脂(E-poxyresin)作为界面相容剂,研究了界面相容剂对玻璃纤维增强ABS复合材料力学性能及界面粘接的影响。结果表明,加入SMA或环氧树脂,玻纤增强ABS复合材料的力学性能明显提高;SMA与环氧树脂复配有明显的协同效果,同时加入SMA和环氧树脂后的复合材料的性能更加优越,界面粘接性能得到很大的改善,在玻纤加入量为30%时,其拉伸强度、弯曲强度、冲击强度较未添加界面相容剂时分别提高了44%、29%、100%。     

聚苯醚/丙烯腈-丁二烯-苯乙烯共聚物共混合金的结构与性能EI北大核心CSCD

采用熔融共混法制备了不同比例的聚苯醚(PPO)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金,并以苯乙烯接枝马来酸酐共聚物(SMA)作为增容剂,采用哈克转矩流变仪、扫描电子显微镜、冲击和拉伸试验、热重分析等研究了PPO/ABS共混合金的加工流动性、相形态、力学性能和热稳定性。结果发现,PPO和ABS属于热力学不相容聚合物,SMA可以在PPO/ABS合金中起到较好的增容作用; PPO/ABS合金中ABS的含量越高,合金加工流动性越好,SMA可以使PPO/ABS合金的转矩明显降低,但其含量对转矩的影响较小; PPO/ABS合金的力学性能较差,加入适量SMA后合金的冲击性能和拉伸性能都有较大改善; PPO/ABS共混合金中PPO的含量越高,合金的热稳定性越好,SMA对合金的热稳定性影响不大。     

聚苯醚/丙烯腈-丁二烯-苯乙烯共聚物共混合金的结构与性能

采用熔融共混法制备了不同比例的聚苯醚(PPO)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金,并以苯乙烯接枝马来酸酐共聚物(SMA)作为增容剂,采用哈克转矩流变仪、扫描电子显微镜、冲击和拉伸试验、热重分析等研究了PPO/ABS共混合金的加工流动性、相形态、力学性能和热稳定性。结果发现,PPO和ABS属于热力学不相容聚合物,SMA可以在PPO/ABS合金中起到较好的增容作用; PPO/ABS合金中ABS的含量越高,合金加工流动性越好,SMA可以使PPO/ABS合金的转矩明显降低,但其含量对转矩的影响较小; PPO/ABS合金的力学性能较差,加入适量SMA后合金的冲击性能和拉伸性能都有较大改善; PPO/ABS共混合金中PPO的含量越高,合金的热稳定性越好,SMA对合金的热稳定性影响不大。     

r-PET/ABS共混合金材料的研究

以回收聚对苯二甲酸乙二醇酯(r-PET)为基体材料,丙烯腈-丁二烯-苯乙烯共聚物(ABS)为增强材料,添加相容剂A,通过挤出、注塑成型方法制备r-PET/ABS共混合金材料.用SEM观察分析r-PET/ABS共混体系形态结构,用差示扫描量热法(DSC)对r-PET/ABS共混体系的结晶性能进行了表征,并对其力学性能进行...     

ABS相态组成对PC/ABS合金力学性能和阻燃性能的影响

以十溴二苯乙烷(DBDPE)/三氧化二锑(Sb_2O_3)协同体系为阻燃剂,聚四氟乙烯(PTFE)为抗滴落剂,通过熔融共混法制备聚碳酸酯(PC)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)阻燃合金。采用苯乙烯与丙烯腈无规共聚物(SAN)和ABS高胶粉(ABS-HRP)调节PC/ABS阻燃合金中ABS的相组成,通过扫描电子显微镜(SEM)观察ABS相中SAN与PB两相比例对阻燃合金相形态和相界面的影响,并通过冲击性能、拉伸性能和阻燃性能测试研究ABS相组成对阻燃合金力学性能和阻燃性能的影响。结果表明,在PC和ABS质量比为70:30、溴锑阻燃剂为5 phr的前提下,当用5 phr SAN取代ABS,合金可以达阻燃UL 94 V-0,缺口冲击强度由7.6 kJ/m~2提高到10.3 kJ/m~2,拉伸强度从52.3 MPa提高到54.5 MPa,少量SAN(5 phr)可以起到刚性粒子增强增韧的双重效果;当用15 phr ABS-HRP取代ABS,合金可以达阻燃UL 94 V-0,并且保持较好韧性(缺口冲击强度29.2 kJ/m~2)和刚性(拉伸强度44.7 MPa)的平衡。     

SMA增容ABS/PBT共混体系的形态和力学性能——共混过程对体系的影响

以苯乙烯-马来酸酐共聚物(SMA)为增容剂,研究了共混工艺对ABS/PBT共混物聚集态结构和力学性能的影响。结果表明,SMA先与ABS共混再与PBT共混,共混物的分散相尺寸最小、分布最均匀,优于SMA先与PBT共混再与ABS共混的方法。ABS与PBT共混物的相容性差,加入反应性相容剂SMA后,PBT分散相尺寸变小且均匀地分散于ABS中,显著改善了ABS/PBT共混物的冲击、拉伸性能。共混物的聚集态结构强烈地受共混工艺的影响。     

ABS木塑复合材料的制备与研究

以丙烯腈-丁二烯-苯乙烯共聚物(ABS)塑料为基体,木粉和纳米蒙脱土为填料,采用双螺杆挤出造粒后模压成型工艺制备高性能ABS木塑复合材料。研究了木粉、纳米蒙脱土、界面相容剂ABS接枝马来酸酐(ABS-g-MAH)含量等对ABS木塑复合材料力学性能的影响和SEM分析。结果表明:木粉含量为50%(wt,质量分数,下同),纳米MMT含量为10%,ABS-g-MAH含量为2%时,ABS木塑复合材料的力学性能最佳,弯曲强度达到69MPa、弯曲模量达到5900MPa和冲击强度达到17kJ/cm~2。从材料的SEM图观察到,加入木粉、纳米MMT和ABS-g-MAH后材料的界面相容性得到提高,增强了材料的力学性能。     

聚碳酸酯/丙烯腈-丁二烯-苯乙烯复合材料的力学性能敏感度

研究了丙烯腈-丁二烯-苯乙烯(ABS)与相容剂甲基丙烯酸甲酯、丁二烯和苯乙烯三元共聚物(MBS)对聚碳酸酯(PC)/ABS复合材料的拉伸强度及其熔接痕敏感度与冲击厚度敏感度的影响。结果表明,随ABS含量的增加,相容相苯乙烯-丙烯腈(SAN)与橡胶相丁二烯(PB)共同作用,使得体系的拉伸强度逐渐降低,拉伸强度因子呈现先微弱增加、后减小、再增加的趋势,并在ABS含量为10%时获得最大值;冲击厚度因子在PC或ABS出现严重聚集态时表现出最强烈的厚度敏感性。同时,MBS能显著增加PC与ABS两相的相容性,降低拉伸强度对熔接痕的敏感程度。     

共混型高耐热ABS合金的研制

以ABS树脂为基体,加入短玻璃纤维提高了材料的耐热性,但冲击强度下降,进一步引入与ABS相容性很好的苯乙烯-马来酸酐共聚物（SMA）,发现ABS与玻璃纤维间产生了强有力的界面粘合,在SMA含量7%时,显著的提高了ABS/玻纤体系的耐热性、冲击强度和拉伸强度,再进一步引入适量的刚性丙烯酸酯类聚合物,使ABS/玻纤/SMA体系的耐热性又有所提高,令人惊奇的是,在丙烯酸酯类聚合物含量为30%时,体系的冲击性能也明显增加,这归功于刚性有机填料对体系的冷拉增韧效果,最终成功研制出一种高耐热、综合性能优良的ABS/改性剂/玻纤共混合金。     

纳米CaCO3复合微粒增韧增强PC/ABS合金

经甲基丙烯酸甲酯和丙烯酸丁酯双单体聚合包覆的纳米碳酸钙形成了核壳结构增韧复合微粒。在双螺杆挤出机中采用二次挤出法制备出PC/ABS/纳米碳酸钙复合材料。研究纳米碳酸钙复合微粒对PC/ABS合金力学性能的影响表明:添加适量纳米CaCO3复合微粒,PC/ABS合金的缺口冲击强度和拉伸强度都得到提高。纳米CaCO3复合微粒具有无机纳米颗粒和弹性体双重协同增韧的作用,其表面的聚合物分子链与基体树脂起到嵌段增容作用。     

改性纳米碱式氯化镁晶须填充ABS/PP复合材料的力学性能

本文通过熔融共混法在接枝了PMMA的碱式氯化镁（g-BMC）表面包覆TPE橡胶层,制得BMC母料,再将其与PP、ABS共混复合制备出ABS/PP复合材料,分别考察了BMC母料、g-BMC以及PP三者不同添加量对复合材料力学性能的影响。结果表明,在试验用量范围内,BMC/ABS复合材料的冲击强度和熔融指数随着BMC填料含量的增加而增大。当BMC母料含量为15%,g-BMC含量为55%时具有较好的冲击性能;当PP含量为9%-10%时,BMC/PP/ABS复合材料的拉伸强度和冲击强度最好;BMC填料含量对复合材料的拉伸强度影响较小,但随其用量增加复合材料的冲击强度有明显提高。     

PMMA、SAN改性PVC/CPE共混体的研究

研究了刚性聚合物(PMMA、SAN)对PVC/CPE共混体力学性能、冲击断面形貌及流变性的影响。结果表明,PMMA对PVC/CPE=100/10、100/15体系,SAN对PVC/CPE=100/10体系都具有显著的增韧作用和一定的增强作用;初步的测定显示,刚性聚合物能改善共混熔体的流变性,促进PVC/CPE共混体系中CPE网络结构的形成和分散性。     

Energy absorption in blends of polycarbonate with ABS and SAN

Polycarbonate and its blends with ABS and SAN were tested to study the energy absorbing properties and the deformation mechanism. In tension and impact tests, these blends were found to possess a high energy absorbing capability, high yield strength and large rupture elongation. ABS and SAN particles in the blends deform in a ductile manner to an elongation of more than 100% under a tensile stress. In an elongation test of ABS under a hydraulic pressure of 90×10⁵ N m^–2, the transformation from crazing to a cold-drawing mechanism was found to occur. The large elongation of ABS and SAN in the blends is attributed to the cold drawing which occurs under the influence of the pressure acting on the dispersed ABS and SAN, caused by the difference between the elastic moduli of the dispersoid and the matrix.     

Mechanical and three-body abrasive wear behaviour of PMMA/TPU blends

The blends of poly(methyl methacrlate) (PMMA) and thermoplastic polyurethane (TPU) were prepared by a Brabender co-twin screw extruder. The mechanical and three-body abrasive wear behaviour of PMMA/TPU blends has been studied. Three-body abrasive wear tests were conducted using rubber wheel abrasion tester (RWAT) under different abrading distances at 200 rpm and 22 N load. A significant reduction in tensile strength and tensile modulus with an increase in TPU content in the blend formulation was observed. Three-body abrasive wear results indicate that the wear volume increases with increase in abrading distance for all the samples studied. However, neat PMMA showed better wear resistance as compared to PMMA/TPU blends. The worn surface features, as examined through scanning electron microscope (SEM), show matrix cracking and deep furrows in PMMA/TPU blends.     

In situ polymerization preparation of blends of poly(methyl methacrylate) and poly(styrene-co-acrylonitrile)

The in situ polymerization of methyl methacrylate (MMA) with poly(styrene-co-acrylonitrile) (SAN) was studied. The PMMA/SAN in situ polymerization blends obtained were examined by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), tensile tests and scanning electron microscopy (SEM). The blends with compositions of 95/5, 80/20, 70/30, and 60/40 in weight ratios were miscible and had a single phase structure. However, the 90/10 PMMA/SAN in situ polymerization blend obtained was inhomogeneous and had a two-phase structure; polymerization-induced phase separation occurred during the preparation process of the blend. Both tensile strength and elongation at break increase with increasing SAN content up to 30 wt%. The degradation temperature and thermal stability of PMMA increased remarkably on incorporation of SAN up to 30 wt%.     

阴离子聚合尼龙6/ABS合金的制备与性能

采用缩二脲（HDI）封端端羟基丁腈橡胶预聚物,制备大分子橡胶改性活化剂,以氢氧化钠为催化剂,选择不同配比的ABS树脂加入熔融己内酰胺单体中,确定聚合温度为160℃~180℃,通过阴离子聚合制得ABS/尼龙6（PA6）共混物。在原位合成ABS改性尼龙体系中,以橡胶改性剂作为ABS与尼龙的相容剂,当ABS用量为m（ABS）...     

Fracture Surface Analysis of 3D-Printed Tensile Specimens of Novel ABS-Based Materials

One of the most common materials utilized by material extrusion 3D printing is acrylonitrile butadiene styrene (ABS). The work presented in this research explored the effect of the addition of reinforcing materials on the mechanical properties of ABS in an effort to create materials with enhanced physical properties. A comparison was made between pure ABS, two ABS matrix composites, and one ABS/elastomer blend with the purpose of characterizing the effect of additives on the mechanical properties. Tensile test results of specimens built in different orientations showed that ABS reinforced with 5% by weight TiO₂ exhibited the highest ultimate tensile strength for specimens built in both horizontal and vertical directions with 32.2 and 18.4 MPa, respectively. The compounding of an elastomeric material with ABS improved the surface finish of parts as they were visibly smoother compared to those printed from the ABS baseline material, though there was an observable decrease in the ductility of tensile specimens. Analysis was performed on the fracture surface of the tensile specimens through the use of scanning electron microscopy. Fractography revealed different modes of failure related to the different additives. The effects of additives on the anisotropy associated with the mechanical properties of 3D-printed parts were also analyzed.     

氯化聚氯乙烯的增韧改性

研究了不同结构的弹性粒子——ABS、CPE、ACR对氯化聚氯乙烯(CPVC)力学性能的影响。研究表明,三种弹性粒子均能有效地改善CPVC的冲击强度,提高其断裂伸长率,如在CPVC中加入12 phr的ABS,其冲击强度可增加177.7%。但同时,材料的拉伸强度受损。CPE-ABS和CPE-ACR二元复合弹性体对CPVC有较好的协同增韧作用。加入二元复合弹性体后,体系的断裂机制将发生脆-韧转变。