注射级ABS／SBS共混物制备

本文研究了注射级ABS/SBS共混体系的流变性能和力学性能,分析了共混物的形态结构。结果表明SBS是ABS的良好增韧剂,随SBS含量增加,共混物的粘度减少,拉伸强度降低,而韧性明显增加。当SBS含量为10%时脆点降至—38℃,此时共混物具有均匀的微相结构。     

磺酸钠基苯乙烯-丁二烯-苯乙烯嵌段共聚物离聚体的力学性能及其应用

由环氧化苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)与NaHSO3开环反应合成了磺酸钠基SBS离聚体。研究了离聚体力学性能的影响因素、离聚体对SBS/氯醇橡胶(CHR)的增容作用、质量比对离聚体/聚丙烯(PP)共混物性能的影响。结果表明:硬脂酸锌能提高离聚体的力学性能;随着离聚体离子含量的增加,拉伸强度及扯断伸长率增加。加入少量离聚体,使离聚体/CHR共混物的力学性能提高,扫描电镜显示两者的相容性增加;离聚体与PP共混,在拉伸强度方面呈现协同效应。质量比各为1/1的离聚体增容SBS/CHR和离聚体/PP共混物的耐油性均较SBS大为改善。     

SEBS弹性体对聚丙烯形貌、力学性能和结晶性能的影响

采用SEBS(氢化SBS)弹性体增韧PP.利用SEM、DSC、熔体指数、力学性能测试等研究不同SEBS含量的PP/SEBS共混物的力学性能、微观形态结构以及结晶性能.结果表明:SEBS可均匀分布在基体中,改善PP的加工流动性;SEBS的加入使得PP的球晶尺寸减小,结晶度降低;随着SEBS含量增加,共混物的冲击韧性有较大幅度的提高,而屈服强度略有下降:当加入25%的SEBS时,PP/SEBS共混物的冲击强度比纯PP提高近26倍,拉伸强度则仅仅降低23%.     

CPVC/ABS二元共混物性能的研究

研究了ABS树脂对CPVC/ABS共混物的力学性能和加工性能的影响.结果表明随着ABS含量的增加,CPVC/ABS二元共混物的拉伸强度、维卡软化点和熔体粘度下降,而CPVC/ABS共混物的冲击强度得到明显改善;当ABS含量为30%时,共混物的冲击强度为11.0 kJ/m2,维卡软化点为110 ℃,凝胶化时间为52 s,平衡扭矩为17.7 N·m.     

超韧PA6/ABS合金性能和断口形貌研究

以幕乙烯-马来酸酐共聚物(SMA)为增容剂,研究了SMA含量对PA6/ABS共混物力学性能和断口形貌的影响.实验结果表明:随着SMA含量的增加,PA6/ABS共混物的拉伸强度逐渐增加,冲击强度先增加,接着保持不变,后降低;PA6/ABS共混物冲击断面可分为裂纹稳定扩展区与快速扩展区,SMA质量含量超过临界值后稳定扩展区相对面积明显减少,且使稳定扩展区相对面积明显减少的SMA临界含量随着共混物中ABS含量增加而增加.     

SBS与聚丙烯的共混及共混物的性能研究

聚丙烯加工性能优良且生产成本低,但其较低的韧性和较差的冲击性能,在一定程度上限制了其应用。本实验SBS和聚丙烯为原料,经双螺杆挤出机共混制得不同含量SBS的共混物,再对其进行冲击、拉伸等力学性能测试,研究SBS含量对共混物机械性能的影响。实验结果表明:随着SBS用量的增加,共混物的冲击强度不断增大,拉伸强度反而逐渐降低。SBS与聚丙烯共混能有效提高其冲击强度和韧性,但使材料的强度有所下降。当SBS含量为20%时,共混物的综合性能最优。     

SBS/PS共混物耐疲劳性能研究

研究了熔融法制备苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)/聚苯乙烯(PS)共混物的耐疲劳性能.结果表明,随着PS含量的增加,SBS/PS共混物屈服强度增大,由韧性断裂变成脆性断裂.而断裂强度和断裂伸长率随着PS含量的增加而降低.在动态载荷作用下,SBS/PS共混物动态疲劳的最大负载和平衡负载随着PS含量的增加而增大....     

硫酸盐基离聚体的形态结构、力学性能及其共混

由环氧化（苯乙烯-丁二烯-苯乙烯）三嵌段共聚物（SBS）与硫酸氢钠水溶液反应制备了新型含硫酸盐基的SBS离聚体，研究了离聚体的形态结构、力学性能、离聚体时SI玛／氯醇橡胶（CHR）共混物的增容作用以及离聚体／聚丙烯（PP）共混物的力学性能。结果表明：在透射电镜下硫酸铅基离聚体呈现黑色圆柱状或四方晶形离子微区，硬脂酸锌作为离子增塑剂能提高钠离聚体的力学性能；随着离子基含量的提高，离聚体的拉伸强度及扯断伸长率增加；少量离聚体可以提高SBS／CHR共混物的力学性能，减小共混物的吸煤油率；扫描电镜图片显示二者的相容性增加；离聚体／PP共混物在拉伸强度与组成的关系方面呈现协同效应，并且其耐甲苯性能提高。     

CPVC／ABS二元共混物性能的研究

本文研究了ABS树脂对CPVC／ABS共混物的力学性能和加工性能的影响。结果表明,随着ABS含量的增加,CPVC／ABS二元共混物的拉伸强度、维卡软化点和熔体粘度下降,而CPVC／ABS共混物的冲击强度得到明显改善。     

PA6/ABS共混物性能研究

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。     

ABS/PVC/CPE共混体系的力学性能

研究了填充改性丙烯腈-丁二烯-苯乙烯(ABS)三元共聚物、聚氯乙烯(PVC)和CPE三元共混体系力学性能与结构的关系。结果表明，在ABS／PVC共混体系中加入增容剂氯化聚乙烯(CPE)后，提高了共混体系的相容性和机械力学性能；随着共混体系中CPE用量的增加，ABS／PVC／CPE共混体系的冲击强度、断裂伸长率上升，拉伸强度下降，而弹性模量则出现了极大值。     

Effect of Rubber Content of ABS on Properties of PC/ABS Blends. I. Rheological,Mechanical, and Thermal Properties

ABSTRACT

The effect of rubber content of poly (acrylonitrile butadiene styrene) (ABS) on compatibility and properties of polycarbonate (PC)/ABS blend systems has been investigated. The rheological, mechanical, physical, and thermal properties of PC/ABS blend systems containing ABS of different rubber content were studied. The reduced torque data on Torque Rheocord indicated improved processability of PC by addition of ABS, however, in ABS-rich compositions, higher rubber content reduces the extent of improvement. The tensile strength of PC decreased with addition of ABS to it but PC-rich compositions have a nearly additive response. The deviation form additivity for blends having higher rubber ABS was more pronounced. However, the impact strength of blends having higher rubber ABS were higher than other types and showed a positive deviation from additivity with variation in compositions. The blends containing ABS with lower rubber content showed a single glass-transition temperature (Tg) in differential scanning calorimetry studies (DSC) in the whole composition range indicating miscibility. Although two Tgs, one associated with PC phase and one with ABS phase, were observed for blends containing high rubber ABS, the shift in Tgs with respect to pure component values indicates partial miscibility. The decrease in the extent of shift with increase of ABS in these blends indicates undesirable phase separation due to poor adhesion of higher level of rubber content.     

连续本体法制备高性能ABS树脂用橡胶的研究

采用不同的橡胶种类和橡胶配比与苯乙烯、丙烯腈进行连续本体法丙烯腈丁二烯苯乙烯共聚物(ABS)中试生产,并对不同条件下的ABS产品进行微观结构和溶胶过程分析。结果表明,使用独山子低顺式聚丁二烯橡胶（50AF）制备的本体ABS产品性能全面优于上海高桥低顺式聚丁二烯橡胶（55AE）、50AF与燕山高顺式聚丁二烯橡胶（BR9004）组成的混合胶; 混合胶中,当50AF与BR9004的混合配比为7∶3时ABS产品性能更好;ABS产品冲击强度均随着胶液含量的增加而增大,熔体流动速率均随着胶液含量的增加而降低。     

Influence of compatibilizer on mechanical,morphological and rheological properties of PP/ABS blends

The objective of this work was to study the compatibilizer effect on polypropylene (PP) and acrylonitrile butadiene styrene (ABS) blends. The blends were coextruded and injection molded in various ratios of ABS with and without compatibilizers. Universal testing machine was employed to analyze the tensile properties of basic PP/ABS binary blends. From the mechanical testing, the impact and tensile properties of PP/ABS blend were optimized at 80/20 weight ratio. Various compatibilizers such as PP-g-MAH, SEBS-g-MAH and ethylene α-olefin copolymer were used and their comparative performance on binary blend was enumerated. Hybrid compatibilization effect was also studied and reported. However, the addition of compatibilizers showed the maximum increase in impact strength attributed to rubber toughening effect of ABS. The effect of compatibilizers on morphological properties was examined using scanning electron microscopy (SEM). SEM micrographs depicted the more efficient dispersion of ABS particles in PP matrix with the addition of compatibilizers. Further, interparticle distance analysis was carried out to evaluate the rubber toughening effect. The ABS droplet size in compatibilized PP/ABS blend was brought to minimum of 3.2 μm from 9.9 μm with the addition of compatibilizers. The melt rheology of PP/ABS blend systems was investigated through parallel plate arrangement in frequency sweep. Linear viscoelastic properties like storage (G′) and loss (G″) modulus and complex viscosity (η*) have been reported with reference to the virgin materials. It is understood that the combination of compatibilizers (hybrid compatibilizer) had a considerable effect on the overall blend properties.     

SAM树脂对PC/ABS合金的改性研究

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。     

The influence of viscosity and composition of ABS on the ABS/SBS blend morphology and properties

Acrylonitrile–butadiene–styrene (ABS) shows excellent impact resistance and good stiffness. The incorporation of thermoplastic elastomer into ABS may consist in an interesting approach to further improve the toughness of ABS, in addition to tuning its compatibility with reinforcements. Blends of ABS and styrene–butadiene–styrene (SBS) were obtained by extrusion from different types of ABS with different SBS contents. The results showed that morphology and mechanical behavior of ABS/SBS blends depend strongly on the composition and characteristics of ABS matrix. An increase in elongation at break and slight decrease in modulus could be observed by increasing SBS content. ABS/SBS blend possessing good dispersion of rubber particles with sizes ranging from 0.1 to 0.8 μm of rubber particles exhibited the better performance of the impact resistance, whereas blends showing a predominance of relatively large particles resulted on poorer mechanical properties. These results suggest that viscosity and composition of ABS matrix play a significant role on the dispersion and coalescence of the dispersed phase during mixing. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47075.     

PB橡胶粒径对CPVC/PVC/ABS共混体系结构与性能的影响

采用乳液聚合技术合成了一系列不同PB橡胶粒径的ABS核壳改性剂,将其与CPVC、PVC共混,考察了CPVC/PVC/ABS共混物的结构与性能。动态力学分析表明：CPVC与PVC比例为90/10时,CPVC/PVC共混物部分相容,CPVC/PVC/ABS共混物也是部分相容;扫描电子显微镜分析其形态结构表明：共混物中ABS分散受PB橡胶粒径影响,PB橡胶粒径为113 nm的ABS在CPVC中分散最均匀。力学性能测试表明：随着PB橡胶粒径的增加,共混物的冲击强度先增大后减小,拉伸强度并无明显变化。     

Polylactide toughening with epoxy‐functionalized grafted acrylonitrile–butadiene–styrene particles

Glycidyl methacrylate functionalized acrylonitrile–butadiene–styrene (ABS‐g‐GMA) particles were prepared and used to toughen polylactide (PLA). The characteristic absorption at 1728 cm^?1 of the Fourier transform infrared spectra indicated that glycidyl methacrylate (GMA) was grafted onto the polybutadiene phase of acrylonitrile–butadiene–styrene (ABS). Chemical reactions analysis indicated that compatibilization and crosslinking reactions took place simultaneously between the epoxy groups of ABS‐g‐GMA and the end carboxyl or hydroxyl groups of PLA and that the increase of GMA content improved the reaction degree. Scanning electron microscopy results showed that 1 wt % GMA was sufficient to satisfy the compatibilization and that ABS‐g‐GMA particles with 1 wt % GMA dispersed in PLA uniformly. A further increase of GMA content induced the agglomeration of ABS‐g‐GMA particles because of crosslinking reactions. Dynamic mechanical analysis testing showed that the miscibility between PLA and ABS improved with the introduction of GMA onto ABS particles because of compatibilization reactions. The storage modulus decreased for the PLA blends with increasing GMA content. The decrease in the storage modulus was due to the chemical reactions in the PLA/ABS‐g‐GMA blends, which improved the viscosity and decreased the crystallization of PLA. A notched impact strength of 540 J/m was achieved for the PLA/ABS‐g‐GMA blend with 1 wt % GMA, which was 27 times than the impact strength of pure PLA, and a further increase in the GMA content in the ABS‐g‐GMA particles was not beneficial to the toughness improvement. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

ABS高胶粉对ABS/PET/SMA合金的增韧研究

采用ABS高胶粉(ABSHR)对丙烯腈-丁二烯-苯乙烯共聚物(ABS)/聚对苯二甲酸乙二醇酯(PET)/苯乙烯-g-马来酸酐(SMA)合金进行增韧改性;探讨了ABSHR对合金体系的力学性能、耐热性和流变性能的影响;同时采用扫描电镜(SEM)对其断面形态进行表征。研究结果表明:ABSHR可以显著提高ABS/PET/SMA合金的冲击强度和断裂伸长率。当ABSHR加入量为20份时,冲击强度从7.7kJ/m2提高到17.6kJ/m2,断裂伸长率从24.6%提高到60.2%;而体系的拉伸强度和弯曲强度有不同程度的降低;维卡软化温度随着ABSHR的增加而逐渐降低;ABSHR增韧体系的剪切黏度和假塑性均得到提高。未增韧的合金断面较平整;而增韧的合金断面产生大量橡胶撕裂带,并伴有应力发白现象。     

Recycled polycarbonate/acrylonitrile–butadiene–styrene reinforced and toughened through chemical compatibilization

To improve the utilization efficiency of recycled polycarbonate/acrylonitrile–butadiene–styrene (R-PC/ABS), we studied the mechanical, morphological, and rheological properties of R-PC/ABS with styrene–butadiene–glycidyl methacrylate (SBG), which was used to reinforce and toughen the R-PC/ABS through chemical compatibilization. Fourier transform infrared spectroscopy demonstrated that carboxyl and hydroxyl groups in R-PC/ABS reacted with epoxy groups in SBG to produce ester and ether groups. The results of scanning electron microscopy show that the domain sizes of the ABS particles decreased when the SBG content was 6 wt %; this demonstrated that the compatibility of the polycarbonate (PC) and ABS was improved after the addition of SBG. The results of the loss modulus of dynamic mechanical analysis were consistent with the morphological results, which reflected a better compatibility of PC and ABS in the modified samples. The introduction of SBG increased the molecular weight and entanglements; this improved the viscosity and storage modulus in the modified samples, as demonstrated by the rheological results. Furthermore, the mechanical properties were obviously enhanced, especially the impact strength, when the SBG content was 6 wt %; this was ascribed to the chemical reactions and improved compatibility after melt extrusion with SBG. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47537.