共查询到20条相似文献,搜索用时 0 毫秒
1.
The effect of addition of rigid, nonreinforcing, and noninteracting filler viz. finely ground NaCl in chlorobutyl vulcanizates on properties such as physicomechanical, dynamic mechanical, and swelling has been studied. The nonreinforcing effect of NaCl in the system was studied by Russel and Cunnenn analysis and Kraus plots. Mechanical measurements of stress and strain at the break of filled and unfilled samples showed no appreciable change in the mechanical behavior of the system. The dynamic mechanical analysis showed that there is no change at all in the glass transition temperature with addition of NaCl filler. The damping properties showed an increase with increase in filler loading because of the filler–filler friction. The swelling behavior of NaCl‐filled CIIR was studied for a period of 60 days in four different solvents of varying chemical energy potential viz. water, chloroform, acetone, and tetrahydrofuran (THF). The degree of swelling was found to increase continuously with time in water, which is a good solvent for the filler, and in THF, which is a good solvent for the polymer matrix. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 707–714, 2006 相似文献
2.
研究NBR/氯磺化聚乙烯(CSM)并用比、硫黄用量、炭黑品种与用量、增塑剂及防老剂品种对NBR/CSM并用胶物理性能的影响。NBR/CSM并用胶优化配方为:NBR40,CSM60,炭黑N55055,氧化锌2.5,硬脂酸1,氯化石蜡10,防老剂MB1,硫黄1,促进剂TMTD0.5,促进剂CZ0.9。该配方并用胶的综合物理性能良好。 相似文献
3.
CPVC/ABS二元共混物性能的研究 总被引:8,自引:0,他引:8
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. 相似文献
4.
Evaluation of mechanical,thermal, electrical,and transport properties of MWCNT‐filled NR/NBR blend composites 下载免费PDF全文
Carbon nanotube based polymer nanocomposites found versatile applications and hence studying its reinforcing effect on NR/NBR blend system is a promising step in developing flexible elastomer gadgets. In this study, attempts have been made to prepare multi‐walled carbon nanotube (MWCNT)‐filled nanocomposites of NR/NBR blends. Raman spectra and transmission electron microscopic analysis indicate that there has been a finer and uniform dispersion of carbon nanotubes within the polymer matrix. Mechanical properties like tensile strength, tear resistance, abrasion loss and compression set of pure and blend samples showed an improvement with the increase in the dosage of MWCNT from 0.5 to 4 phr. 70/30 NR/NBR blend with 4 phr of MWCNT showed an improvement of 83% in tensile strength and 72% in tear strength compared to pure NBR. This is attributed to the uniform dispersion, high surface area, nano level interaction, and compatibility of MWCNT with the polymeric molecular chains. MWCNT is acting as a compatibilizing agent as is manifest from the increased negative values of free energy. Electrical conduction and thermal stability of the mixes were increased with the concentration of MWCNT due to the increase in the interfacial interaction resulting from the pi‐pi interaction with the nanotubes. POLYM. ENG. SCI., 58:961–972, 2018. © 2017 Society of Plastics Engineers 相似文献
5.
NBR/EPVC共混物的性能研究 总被引:1,自引:0,他引:1
研究NBR/聚氯乙烯糊树脂(EPVC)常温共混物的物理性能及耐热老化性能,并与NBR/硬质聚氯乙烯(SPVC)高温共混物进行对比,结果表明,加入EPVC可提高NBR的耐热老化性能;与NBR/SPVC高温共混物相比,NBR/EPVc常温共混物的300%定伸应力、拉伸强度和撕裂强度增大,耐热老化性能提高,耐臭氧老化性能相当,且共混工艺简单,可节约能源和降低混炼成本。 相似文献
6.
7.
研究了对叔丁基酚醛树脂用量对NR/NBR/环氧化天然橡胶(ENR)共混物动态力学性能的影响。加对叔丁基酚醛树酯的NR/NBR/ENR共混物有2个动态力学损耗峰(分别对应共混物的玻璃化转变温度Tg1和Tg2)。随着对叔丁基酚醛树脂用量(0-15份)增大,共混物的Tg1基本不变,Tg2则逐渐升高;温度为Tg1的共混物损耗因子(tanδ)峰值化不大,温度为Tg2的共混物tanδ峰值则逐渐增大。通过调节对叔丁基酚醛树脂用量可以改变共混物在0和65℃附近的tanδ值,从而获得抗湿滑性能好、滚动损失小的新型胎面材料。 相似文献
8.
NBR/PVC共混物的共混工艺和性能 总被引:1,自引:0,他引:1
介绍NBR/PVC共混物的共混工艺和性能。NBR/PVC共混物共混工艺主要有乳液共沉法和机械共混法,其中乳液共沉法共混物性能较好,机械共混法操作简单、成本较低。影响共混物性能的因素主要有NBR的门尼粘度和丙烯腈含量、PVC品种、NBR/PVC共混比、共混温度以及PVC在共混物中的分散程度等。 相似文献
9.
10.
11.
丁腈橡胶(NBR)与聚氯乙烯(PVC)共混合金是橡塑共混体系中一类重要的共混体系,NBR和PVC都属于极性聚合物,在共混过程中,相容性较好,因此这种体系被广为研究和应用。但此方法是选用粉末丁腈胶直接加入PVC中进行混炼共混,仍然存在共混不均匀的问题。本实验用乳液共混凝聚法制备了NBR/PVC共沉胶,研究了共沉工艺条件、丁腈胶种类与性能对NBR/PVC合金性能影响。 相似文献
12.
13.
Md. Saiful Islam Sinin Hamdan Mahbub Hasan Mohamad Rusop Md. Rezaur Rahman M. A. M. Mohd Idrus 《应用聚合物科学杂志》2013,127(3):1555-1560
In this present research, several kinds of selected tropical light hardwoods were chemically modified with benzene diazonium salt to improve their physico‐mechanical and decay resistance properties. Benzene diazonium salt underwent a coupling reaction with wood which was confirmed through fourier transform infrared spectroscopic analysis. The compressive modulus of the treated wood increased, whereas modulus of rupture was shown to decrease on treatment. Water absorption was also found to decrease considerably after modification. The modified wood samples had higher hardness (Shore D) value compared to that of the control ones. The wood was exposed to two types of fungi; white‐rot (Polyporus versicolor) and brown‐rot (Postia placenta), for 12 weeks and then decay was assessed through weight loss percentage (%). A significant improvement was found in the modified wood compared to the control wood. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
14.
15.
Prashant S Khobragade Dharmesh P Hansora Jitendra B Naik James Njuguna Satyendra Mishra 《Polymer International》2017,66(10):1402-1409
Nano‐polystyrene (nPS)‐decorated graphene oxide (GO) hybrid nanostructures were successfully synthesized using stepwise microemulsion polymerization, and characterized using Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), field‐emission scanning electron microscopy and transmission electron microscopy. XRD and FTIR spectra revealed the existence of a strong interaction between nPS and GO, which implied that the polymer chains were successfully grafted onto the surface of the GO. The nPS‐decorated GO hybrid nanostructures were compounded with epoxy using a hand lay‐up technique, and the effect of the nPS‐decorated GO on the mechanical, thermal and surface morphological properties of the epoxy matrix was investigated using a universal tensile machine, Izod impact tester, thermogravimetric analysis and contact angle measurements with a goniometer. It was observed that in the epoxy matrix, GO improved the compatibility. © 2017 Society of Chemical Industry 相似文献
16.
17.
试验研究超细全硫化粉末NBR(UFPNBR)/EPDM共混物的硫化特性、相态结构、动态力学性能,加工性能及物理性能。UFPNBR粒子加入EPDM中明显影响了EPDM的硫化性能,UFPNBR/EPDM共混物采用过氧化物硫化体系硫化效果较好;透射电子显微镜和扫描电子显微镜观察表明,UFPNBR粒子在UFPNBR/EPDM共混物中始终为分散相,但在EPDM基体中没有分散成预期的纳米尺寸;动态力学热分析结果显示,共混物存在两个玻璃化温度,呈两相结构且界面结合较弱;橡胶加工分析仪分析结果表明,UFPNBR粒子在EPDM基体中形成了填料网络结构,使共混物的流动性能变差;UFPNBR对EPDM有一定补强作用,但补强作用不如传统的纳米无机填料。 相似文献
18.
ECO/NBR共混胶的性能 总被引:2,自引:0,他引:2
考察二元共聚氯醚橡胶(ECO)与不同丙烯腈质量分数的NBR共混胶的物理性能、耐老化性能及耐油性能。结果表明,共混胶的物理性能提高,ECO/NBR-4l共混胶的耐热老化性能优于ECO/NBR-35和ECO/NBR-26共混胶.NBR-4l的耐油性能最好。共混比为60/40的ECO/NBR-4l共混物具有优异的耐油性能,玻璃化温度范围为-46~-43℃,可满足耐寒制品的使用要求。 相似文献
19.