ABS/SMA/GF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)作为界面相容剂,研究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玻纤增强ABS复合材料的力学性能明显提高;随着玻纤质量分数增加,复合材料的拉伸强度、弯曲强度均逐渐增加,冲击强度下降.     

碱式硫酸镁晶须增强ABS复合材料制备及性能

以丙烯腈-丁二烯-苯乙烯共聚物(ABS)及碱式硫酸镁晶须为原料,以环氧树脂(ER)和苯乙烯-马来酸酐共聚物(SMA)作为界面相容剂,研究界面相容剂对晶须增强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,碱式硫酸镁晶须增强ABS复合材料的力学性能明显提高;SMA与环氧树脂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.当晶须加入质量分数为15％时,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26％、19％、198％.     

不同改性剂对ABS复合材料力学性能的影响

通过在丙烯腈-丁二烯-苯乙烯共聚物(ABS)中添加不同的改性剂制备ABS复合材料。采用动态力学分析仪,扫描电子显微镜等分析了不同改性剂对ABS复合材料力学性能的影响。结果表明:与未改性的ABS相比,ABS/苯乙烯-马来酸酐共聚物(SMA)复合材料的拉伸强度为51.5 MPa,提高了6.8%;SMA作为相容剂提高了热塑性聚氨酯弹性体(TPU)粒子与ABS树脂之间的界面黏结强度,使得ABS/SMA/TPU复合材料的力学性能得以提高,其拉伸强度达到52.2 MPa,ABS/SMA/ABS高胶粉复合材料的冲击强度为29.3 kJ/m~2,提高了34.4%,综合力学性能较为理想。     

ABS复合材料结构与力学性能研究

以苯乙烯-马来酸酐共聚物(SMA)为相容剂,在丙烯腈-丁二烯-苯乙烯共聚物(ABS)基体中分别添加乙烯-辛烯共聚物弹性体(POE)、热塑性聚氨酯弹性体(TPU)以及ABS高胶粉(ABSHR),制备了ABS复合材料。并运用动态力学分析(DMA)和扫描电镜(SEM)分析等手段,研究了该ABS复合材料力学性能的变化规律。结果表明:与纯ABS相比,POE与ABS的相容性稍差,相容剂SMA的增容效果不理想,ABS/SMA/POE复合材料的力学性能明显降低,其冲击强度降幅最大,达到56.5%;ABS/SMA/ABSHR复合材料各组分的相容性则相对较好,橡胶相分布均匀且粒子尺寸较小,材料的冲击性能明显改善,其冲击强度较纯ABS提高了34.4%。     

ABS/LGF和ABS/LGF/SMA复合材料的性能研究

对ABS／长玻璃纤维(LGF)及ABS／LGF／SMA(苯乙烯／马来酸酐共聚物)2种复合材料的界面形态、纤维效率系数和力学行为进行了研究。结果表明：界面粘结作用是影响力学性能和纤维效率系数的关键因素。对于ABS／LGF体系，弱的界面相互作用使材料表现出低的力学性能和纤维效率系数。而对于ABS／LGF／SMA体系，由于纤维和基体树脂之间的界面相互作用增强导致材料呈现出更高的力学强度，同时纤维效率系数也得到提高。     

增容改性对ABS/亚克力人造石废粉复合材料力学性能的影响

以亚克力人造石废粉对ABS进行填充改性,采用熔融共混法制备了ABS基复合材料。通过力学性能测试研究了苯乙烯-马来酸酐共聚物(SMA)、ABS接枝马来酸酐(ABS-g-MAH)和钛酸酯偶联剂三种改性剂的引入对ABS/亚克力人造石废粉复合材料力学性能的影响。结果表明:改性剂SMA、ABS-g-MAH和钛酸酯偶联剂均能在一定程度上改善ABS/亚克力人造石废粉复合体系的界面相容性,其最佳用量分别为4%、4%和3%,其中SMA对复合材料的改性效果优于ABS-g-MAH和钛酸酯偶联剂。当SMA用量为4%,亚克力人造石废粉用量为20%,复合材料的拉伸强度和弯曲强度达到最高值,分别为42.17 MPa和83.43 MPa。     

ABS复合材料耐溶剂的研究

以苯乙烯-马来酸酐共聚物(SMA)为增容剂,研究了不同浸泡时间与ABS复合材料力学性能的关系。结果表明:随浸泡时间的延长,ABS复合材料力学性能有明显变化;与ABS/PA6复合材料相比,ABS/PBT复合材料具有更优异的耐溶剂性能。     

中药渣纤维/回收ABS复合材料的力学性能研究

将蒸汽爆破处理制得的中药渣纤维增强体与回收的ABS进行熔融共混,制备中药渣纤维/回收ABS复合材料;研究了苯乙烯接枝马来酸酐(SMA)、ABS接枝马来酸酐(ABS-g-MAH)相容剂以及TPW 604润滑剂对复合材料宏观力学性能的影响,并利用扫描电子显微镜(SEM)观察复合材料的拉伸断面形貌特征。结果表明:添加一定量的相容剂可有效地改善中药渣纤维与回收ABS基体之间的界面相容性;分别添加12%的SMA和8%的ABS-g-MAH时,复合材料的力学性能最佳;润滑剂TPW 604的添加量为4%时,复合材料的力学性能最好。     

纳米CaCO_3高填充ABS复合材料的制备

分别采用苯乙烯-丁二烯-苯乙烯共聚物(SBS)和乙烯-乙酸乙烯共聚物(EVA)作增韧剂,利用熔融挤出法制备纳米CaCO_3高填充丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)/CaCO_3复合材料,研究了纳米CaCO_3填充量和增韧剂种类对ABS/CaCO_3复合材料力学性能和熔体流动速率的影响。结果表明:SBS对ABS/CaCO_3复合材料的增韧效果优于EVA;当ABS用量为100.0 phr、纳米CaCO_3填充量为25.0 phr、SBS用量为5.0 phr时,可得到力学性能符合GB/T 10009—1988要求的ABS/CaCO_3复合材料;当SBS和EVA用量较低时,SBS更能明显提高ABS/CaCO_3复合材料的熔体流动速率。     

玻纤增强本体法ABS、乳液法ABS复合材料的制备及其性能

利用双螺杆挤出机共混挤出法分别制备了两种玻纤增强本体法(丙烯腈/丁二烯/苯乙烯)共聚物(ABS)复合材料和两种玻纤增强乳液法ABS复合材料,从熔体流动速率、力学性能、耐热性能等方面比较了它们的差别,并研究了(苯乙烯/马来酸酐)共聚物(SMAH)对玻纤增强ABS复合材料性能的影响.结果表明,少量的SMAH可明显提高玻纤增强ABS复合材料的拉伸强度、弯曲强度和冲击强度,玻纤增强本体法ABS复合材料有更好的力学性能.     

Effect of poly(styrene-co-maleic anhydride) compatibilizer on properties of polystyrene/zinc oxide composites

The effects of polystyrene-co-maleic anhydride (SMA) compatibilizer on mechanical, thermal and morphological properties of polystyrene (PS)/zinc oxide (ZnO) composites were investigated for the first time in this study. PS/ZnO composites were prepared using a twin screw extruder and were then molded by compression method. In order to improve adhesion between filler and matrix, SMA compatibilizer is used in the composites. Tensile strength and Young??s modulus were increased with increasing ZnO and SMA at low concentration, but they were decreased with increasing high concentrations of ZnO and SMA content. Thus, mechanical properties can be enhanced in the composites with SMA compatibilizer. Moreover due to the effect of particle size, 250?nm ZnO particles (ZnO250) improved the mechanical properties of PS more than 71?nm ZnO particles (ZnO71) due to the increased aggregation of latter particles. Glass transition temperatures were not significantly changed when both ZnO and SMA were incorporated. Degradation temperatures of the composites increased with the addition of ZnO particles compared with neat PS and slightly decreased with the incorporation of SMA compared with the nascent composite. Scanning electron microscopy (SEM) analysis showed the better dispersion and compatibility of ZnO particles in PS/ZnO composites with the addition of SMA especially at the content of 3?wt%.     

Bamboo fiber polypropylene composites: Effect of fiber treatment and nano clay on mechanical and thermal properties

In the current study, bamboo fibers were modified with sodium meta‐periodate in order to improve the mechanical and thermal properties of the bamboo‐clay‐polypropylene (PP) composites. Both raw and treated bamboo fibers were used in the manufacturing of the composites. The mechanical and thermal properties of the composites from modified bamboo fibers were found to increase considerably compared with those of untreated fibers. Tensile strengths of (raw bamboo fiber)/PP, (raw bamboo fiber‐clay)/PP, and (treated bamboo fiber‐clay)/PP composites showed a decreasing trend with increasing fiber loadings. However, the values for the chemically modified (bamboo fiber)‐clay‐PP composite at all mixing ratios were found to be higher than that of the original PP. The scanning electron micrographs showed that interfacial bonding between the treated fiber‐clay and matrix has significantly improved. It was determined that better dispersion of the filler into matrix occurred on 5% clay addition and fiber treatment. J. VINYL ADDIT. TECHNOL., 21:253–258, 2015. © 2014 Society of Plastics Engineers     

Bamboo fiber reinforced polypropylene composites and their mechanical,thermal, and morphological properties

Short bamboo fiber reinforced polypropylene composites were prepared by incorporation of various loadings of chemically modified bamboo fibers. Maleic anhydride grafted polypropylene (MA‐g‐PP) was used as compatibilizer to improve fiber–matrix adhesion. The effects of bamboo fiber loading and modification of the resin on the physical, mechanical, thermal, and morphological properties of the bamboo reinforced modified PP composites were studied. Scanning electron microscopy studies of the composites were carried out on the interface and fractured surfaces. Thermogravimetric analysis and IR spectroscopy were also carried out. At 50% volume fraction of the extracted bamboo fiber in the composites, considerable increase in mechanical properties like impact, flexural, tensile, and thermal behavior like heat deflection temperature were observed. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Studies on bamboo polymer composites with polyester amide polyol as interfacial agent

The effect of surface treatment on the properties of bamboo/epoxy, bamboo/polyester composites was investigated. An improvement in the properties was observed when the surfaces of the bamboo fibers were modified with polyesteramide polyol (PEAP). The performance of surface treated bamboo composites in terms of water resistance is significantly better than that of untreated bamboo composites. Polyester amide polyol treated bamboo composites exhibited better mechanical strength properties. Fractographic evidence such as fiber breakage/splitting and matrix adherence on the pulled‐out fiber surface explains such behavior.     

High residual mechanical properties at elevated temperatures of bamboo/glass reinforced‐polybenzoxazine hybrid composite

We successfully added bamboo and glass fibers into bisphenol A‐aniline based benzoxazine (BA‐a) resin by hot‐pressing method. In order to improve the interfacial adhesion between bamboo fibers and the matrix, bamboo fibers were pretreated in 6 wt% NaOH solutions for 12 h. The results showed alkali‐treatment had a positive effect on mechanical properties of the composites at both room and elevated temperatures (60°C, 110°C, 160°C, and 210°C). Due to the incorporation of glass fibers, the bamboo/glass reinforced‐polybenzoxazine hybrid composites exhibited highest strength and modulus among all samples and had high residual mechanical properties at elevated temperatures (residual mechanical properties refers to the ratio of strength and modulus of the composites at elevated temperatures to that measured at room temperature). The fractured surface morphologies of the composites were observed by scanning electron microscope. The results showed with the increase of temperature, the debonding and fiber pull‐out became apparent, and the matrix softening could be clearly observed at 210°C. In addition, thermal and thermomechanical properties of neat benzoxazine and the composites were also investigated through thermogravimetric analysis and dynamic mechanical analyzer, respectively. POLYM. ENG. SCI., 59:1818–1829, 2019. © 2019 Society of Plastics Engineers     

聚乙烯醇缩丁醛作为界面改性剂制备聚已二酸-对苯二甲酸丁二酯/竹粉复合材料

将聚乙烯醇缩丁醛（PVB）作为非反应型界面改性剂用于聚已二酸-对苯二甲酸丁二酯（PBAT）/竹粉木塑复合材料的制备,考察了其界面改性效果及对材料力学性能的影响。PVB分子中的羟基与缩醛基可以分别与竹粉表面的极性基团以及树脂基体相互作用,从而提高复合材料的界面相容性。结果表明,PVB直接添加或溶液添加对复合材料的力学性能影响不大;PVB使PBAT与竹粉的界面结合明显改善。在竹粉含量为30 %（质量分数,下同）下,PVB含量为竹粉含量的1 %时,复合材料的拉伸强度从5.16 MPa提高到6.02 MPa。     

Performance of bamboo plastic composites with hybrid bamboo and precipitated calcium carbonate fillers

The influences of hybrid bamboo and precipitated calcium carbonate (PCC) fillers in a recycled polypropylene/polyethylene matrix on the properties of bamboo plastic composites were studied. Thermogravimetric and Fourier transform infrared analyses of both thermo‐mechanically refined bamboo fiber (RBF) and ground bamboo particle (GBP) showed relatively higher holocellulose content in RBF, and more effective silane grafting on the RBF surface. The raw PCC particles contained over 95% calcium carbonate, and had an agglomerated form consisting of particles with a mean diameter of about 1.2 microns. Compounding the PCC particles with the plastic resin helped separate and disperse them in the matrix. Measured flexural strength and modulus of PCC‐only‐filled composites increased significantly from 15 to 30% PCC content levels, while the tensile and impact strength of composites decreased with the addition of PCC. For composites with hybrid bamboo and PCC fillers, tensile and flexural moduli were improved with the increase of PCC content. After silane treatment, RBF‐filled composites showed noticeably increased mechanical properties compared with those of GBP‐filled composites. For modulus values, PCC–bamboo–polymer composites were 3–4 times higher than those of PCC–polymer composites at high PCC levels. POLYM. COMPOS., 2012. © 2011 Society of Plastics Engineers