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。     

PA6/ABS共混及增容改性

以聚己内酰胺(PA6)为主体材料,将丙烯腈–丁二烯–苯乙烯塑料(ABS)与PA6共混,并加入马来酸酐接枝ABS (ABS-g-MAH)作相容剂,研究了ABS及相容剂ABS-g-MAH用量对PA6/ABS共混物力学性能的影响。结果表明,随着ABS用量增加,PA6/ABS共混物的拉伸强度下降,冲击强度先上升后下降,收缩率变化不大,ABS用量为10份时PA6/ABS共混物的综合性能较好。相容剂ABS-g-MAH对PA6/ABS共混物的力学性能有较明显的影响,随着相容剂用量增加,拉伸强度和冲击强度均先上升后下降,相容剂用量3～9份时有利于共混物保持较高的拉伸强度和冲击强度。     

竹粉/丙烯腈—丁二烯—苯乙烯共聚物(ABS)木塑复合材料的改性研究

研究了竹粉含量对竹粉/丙烯腈—丁二烯—苯乙烯共聚物(ABS)木塑复合材料力学性能的影响,并采用苯乙烯-顺丁烯二酸酐无规共聚物(SMA)和ABS接枝马来酸酐(ABS-g-MAH)两种相容剂来改善竹粉与ABS之间的界面结合.研究表明,SMA能有效改善复合材料的界面相容性,提高复合材料的力学性能和热稳定性,但对其毛细管流变性...     

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。     

丁苯橡胶接枝马来酸酐增容丁苯橡胶/蛭石复合材料的制备

通过力化学接枝反应制得丁苯橡胶接枝马来酸酐,用傅里叶变换衰减全反射红外光谱对接枝物进行了定性表征。将所制备的丁苯橡胶接枝马来酸酐应用于丁苯橡胶/蛭石复合材料体系中,研究了膨胀蛭石和接枝单体马来酸酐的用量对复合材料性能的影响,并通过电子扫描显微镜观察了复合材料内部的微观结构。实验结果表明:当接枝单体用量为6phr、膨胀蛭石用量为15phr时,复合材料综合性能较好。适量丁苯橡胶接枝马来酸酐的生成,有利于改善丁苯橡胶与膨胀蛭石两相间的界面结合。     

回收PC/回收ABS共混体系的性能与结构

利用叶片挤出机制备回收PC/回收ABS共混材料,研究叶片挤出机的加工特性对共混体系的作用,分析了苯乙烯/马来酸酐共聚物(SMA-700)、苯乙烯/丙烯腈/马来酸酐三元共聚物(SMA-800)以及ABS接枝马来酸酐(ABS-g-MAH)这3种相容剂对共混物的力学性能、耐热性、熔体指数及形态结构的影响。结果表明:叶片挤出机能有效促进回收ABS相在回收PC基体中的细化分散,适当用量的相容剂能有效提高共混体系的相容性,增强界面粘结力,SMA-700、SMA-800和ABS-g-MAH添加量分别为6%、2%、6%时共混体系的综合性能最佳。     

相容剂对PC/ABS共混物性能的影响

本文分别研究了马来酸酐接枝ABS(ABS-g-MAH)与甲基丙烯酸甲酯/丁二烯/苯乙烯共聚物(MBS)作为相容剂对PC/ABS共混体系相容性、力学性能、形态结构的影响.研究结果表明:当相容剂MBS加入PC/ABS共混体系中后,不仅能够显著改善PC/ABS共混物的相容性,明显降低分散相的粒径,而且能够使PC/ABS共混物在保持较高的拉伸强度的同时,大幅度地提高共混物的缺口冲击强度和断裂伸长率;而相容剂ABS-g-MAH的加入对共混体系的缺口冲击强度的改善不明显,但其断裂伸长率增幅较大.     

ABS-g-MAH对PA6/ABS合金性能的影响研究

以马来酸酐(MAH)接枝丙烯腈-丁二烯-苯乙烯共聚物(ABS)作为相容剂,研究了相容剂ABS-g-MAH对PA6/ABS合金凝聚态结构和力学性能的影响。结果表明,当ABS-g-MAH质量分数为20%时,合金的冲击强度比未加相容剂的提高了41%。动态力学性能(DMA)和偏光显微镜也很好地说明了加入相容剂的合金,其相容性得到了很好的改善。ABS和ABS-g-MAH的加入明显改善了PA6的吸水性能,当ABS-g-MAH质量分数为10%时,合金吸水率较纯PA6降低了50%。     

无卤阻燃PC/ABS合金的研究

研究了四苯基间苯二酚基二磷酸酷(RDP)和氢氧化铝复配阻燃体系对PC/ABS合金性能的影响;并以马来酸酐接枝丙烯腈-苯乙烯-丁二烯共聚物(ABS-g-MAH)为相容剂,考察了ABS-g-MAH的用量对合金性能的影响.结果表明,复配阻燃体系可显著提高PC/ABS合金的阻燃性能,当RDP为14份、Al(OH)3为6份时,氧指数可达到32%;相容剂的加人能够明显提高合金的力学性能,最佳用量为6%,但使体系的黏度增加,熔体质量流动速率降低.     

亚克力人造石废粉对ABS热分解过程的影响

以亚克力人造石废粉为填料,苯乙烯-马来酸酐共聚物(SMA)为相容剂,采用熔融共混法制备了ABS/亚克力人造石废粉复合材料,通过热分析(TGA)测试,研究了相容剂SMA、亚克力人造石废粉用量对复合材料热分解过程的影响。结果表明,相容剂SMA的加入使得ABS与亚克力人造石废粉之间的相容性变好,ABS与亚克力人造石废粉间联结更加紧密,较好抑制了ABS的热解反应;亚克力人造石废粉中的Al(OH) 3属于强脱水性物质,可加速ABS碳化;起始分解温度及最大热分解速率温度均随亚克力人造石废粉用量的增加而增大,当亚克力人造石废粉用量为20%时达到最大值,较纯ABS分别提高了6. 3℃和5. 3℃。     

硅橡胶隔热复合材料的制备及性能

采用空心玻璃微珠（HGB）和膨胀蛭石（EVMT）作为隔热填料,分别与高温硫化硅橡胶（HTV）共混制备HGB/HTV和EVMT/HTV隔热复合材料,并考察了隔热填料的种类和用量对隔热复合材料的隔热性能和力学性能的影响。结果表明,随着HGB和EVMT用量的增加,隔热复合材料的导热性能明显下降。相比于HTV试样,当HGB与HTV的质量比为20/100,EVMT与HTV的质量比为10/100时,隔热复合材料的导热系数分别下降了20.44%和12.34%。HGB和EVMT均能提高HTV隔热复合材料的100%定伸应力和邵尔A硬度,降低其拉伸强度与扯断伸长率。当HGB与HTV的质量比为20/100,EVMT与HTV的质量比为10/100时,隔热复合材料的拉伸强度分别为10.51 MPa和11.59 MPa,邵尔A硬度分别为71.6和59.1。     

Effect of KH550 on the Preparation and Compatibility of Carbon Fibers Reinforced Silicone Rubber Composites

Silicone rubber has good heat resistance, but its mechanical properties are poor. To improve the mechanical properties of the silicone rubber, the carbon fiber / silicone rubber composites were prepared in this paper, in which the silicone rubber was used as the matrix, the high-performance carbon fiber (CF) treated with coupling agent is used as the reinforcement. The best composite formulation, the types and content of coupling agent are determined by testing mechanical properties of the composites. The morphology structures of the composites were observed by scanning electron microscope (SEM), the compatibility between carbon fiber and silicone rubber was studied by infrared spectrum analysis (IR), dynamic thermal mechanical analysis (DMA) and X-ray photoelectron spectroscopy (XPS). The results show that the best composite formulation is silicone rubber of 100 phr, carbon fiber of 12 phr, coupling agent KH550 of 2.5 phr. The best first curing conditions are at 175 ^°C under 10 MPa for 30 min, the postcuring conditions are at 200 ^°C for 2h. The compatibility between carbon fiber treated with KH550 and silicon rubber is the best by SEM, IR, DMA and XPS analysis, and confirm that the coupling agent KH550 plays a compatilizer role in the preparation process of the carbon fiber/silicone rubber composites.     

DMC/MVQ绝缘复合材料的制备及性能表征

针对硅橡胶力学性能差的特点,本工作以硅橡胶（MVQ）为基相,以团状模塑料（DMC）为增强相,以丁苯橡胶（SBR）为相容剂来制备DMC/MVQ绝缘复合材料,研究了SBR的用量对MVQ性能的影响。结果表明：SBR和MVQ共混制得的并用胶性能要比纯MVQ的性能好,其最佳配比为DMC 60phr,SBR 25phr,MVQ 75phr;制备的复合材料体积电阻率都在4.9×1012Ω.m以上,复合材料的绝缘性能良好;通过扫描电镜分析（SEM）和动态热机械分析（DMA）,研究了复合材料的相容性,SBR的加入改善了DMC/MVQ绝缘复合材料的相容性,增加了界面相互作用,提高了DMC/MVQ绝缘复合材料的性能。     

新型尼龙织布梭的研制及其应用

研究了马来酸酐接枝线性低密度聚乙烯(LLDPE-g-MAH)增容剂对尼龙66/超高分子量聚乙烯(PA66/UHMWPE)复合材料力学性能和形态结构的影响。结果表明,当LLDPE-g-MAH用量为16份时PA66与UHMWPE具有较好的相容性,制得的PA66/UHMWPE复合材料具有较好的综合性能,用其生产的尼龙梭取得了较好的使用效果。     

无机填料的表面处理及其在导热天然橡胶复合材料中的应用

用季戊四醇、丙三醇和钛酸酯偶联剂分别对氧化铝、氧化镁和高岭土进行表面改性,并将改性填料填充天然橡胶(NR)制备了导热复合材料,考察了表面处理剂种类及其用量对无机填料的影响,并研究了季戊四醇改性氧化铝填充NR复合材料的硫化特性、物理机械性能和导热性能.结果表明,3种填料中季戊四醇的改性效果最好,且其用量为1.0～1.5份时对氧化铝的改性效果最佳;随着改性氧化铝填充量的增加,复合材料的最大转矩、300%定伸应力、拉伸强度和热导率均增大,当其用量为60份时,改性氧化铝填充NR复合材料的热导率比未填充NR复合材料提高了23.9%.     

Effect of silicon carbide on the mechanical and thermal properties of ethylene propylene diene monomer-based carbon fiber composite material for heat shield application

In this article, the preparation of silicon carbide (SiC), carbon fiber (CF), and ethylene–propylene–diene monomer composite with different parts per hundred of SiC (phr) ratio (CF/SiC; 10/0, 0/10, 10/10, 10/15, 10/20) and its effect on mechanical and thermal properties have been studied. After the incorporation of SiC up to 20 phr with a stable CF (10 phr), composites demonstrated higher tensile properties up to 12.09 MPa, elongation at break (725%), modulus (3.5 MPa), and hardness (79 Shore-A) at composition (CF10SiC20 phr). Furthermore, the density of the composites has been achieved to a maximum value of 1.081 g/cm³ at composition (CF10SiC20 phr). The synthesized composite's functional group has been analyzed using Fourier-transform infrared spectroscopy. The thermal stability of the composites increased with the inclusion of SiC up to 20 wt% while achieving the 520°C described by thermogravimetric analysis. After gamma irradiation analysis, the mechanical properties of the composites were slightly enhanced. Thermal conductivity of the composites has been maintained up to 0.21 W/mK at CF10SiC20 phr of the composites. The morphology of silicon carbide and carbon fiber was examined using scanning electron microscopy.     

Thermal properties of poly(dimethyl siloxane) nanocomposite filled with silicon carbide and multiwall carbon nanotubes

Silicon carbide was incorporated in poly(dimethyl siloxane) (PDMS) in combination with multiwall carbon nanotubes (MWCNTs) to improve the thermal conduction behavior. The amount of silicon carbide was increased from 0 to 150 phr and the amount of MWCNTs was increased from 0 to 8 phr at a fixed amount of silicon carbide (150 phr). The thermal conductivity of the PDMS composite was increased with increasing amount of the MWCNTs and fine dispersibility of the incorporated MWCNTs was achieved without pretreatment. The rheological properties of the PDMS composites incorporating silicon carbide and MWCNTs were investigated and the activation energy of the composites was calculated during thermal decomposition using the Horowitz‐Metzger method. Importantly, unexpected thermal decomposition behavior as indicated by the reduction in activation energy from 361.63 to 194.18 kJ mol^?1, namely acceleration of decomposition of the PDMS matrix caused by MWCNTs, was observed for the first time. Copyright © 2011 Society of Chemical Industry     

四针状氧化锌晶须改性硅橡胶的性能

制备了四针状氧化锌晶须（ZnOw）/硅橡胶复合材料;详尽地研究了晶须改性硅橡胶复合材料的力学性能、热稳定性及阻尼性能;通过扫描电镜观察了材料的断面以及晶须在基体中的分散性。结果表明：随氧化锌晶须填充量的增加,硅橡胶的力学性能降低,热稳定性和阻尼性能有明显的提高。当填充量为20份时,与纯硅橡胶相比,复合材料的热分解温度提高了近10 ℃,最大损耗因子提高了21%,有效阻尼温域向高温偏移了约15 ℃。     

Thermal properties and processability of talc‐ and calcium carbonate‐filled poly(vinyl chloride) hybrid composites

The main objective of this investigation was to study and compare the thermal rigidity, thermal stability, and processability of poly(vinyl chloride) (PVC) composites filled with single fillers of talc and uncoated ground CaCO₃ (SM 90) or a hybrid filler consisting of talc/SM 90. To produce the composites, the PVC resin, fillers, and other additives were dry‐blended in a laboratory mixer before being milled into sheets by using a two‐roll mill. Test specimens were prepared by compression molding, after which the thermal properties and processability of the composites were determined. Single and hybrid filler loadings used were fixed at 30 phr (parts per hundred parts of resin). Talc‐filled PVC composite showed slightly better thermal stability and rigidity than the composite filled with SM 90, and its thermal stability and rigidity slightly decreased with SM 90 content increasing from 5 to 25 phr in order to replace talc filler in the hybrid composites. The fusion time of talc‐filled PVC composite was shorter than that of SM 90‐filled PVC composite; thus, the fusion time of hybrid composites increased with increasing SM 90. The fusion torque showed an opposite behavior. J. VINYL ADDIT. TECHNOL., 2012. © 2012 Society of Plastics Engineers