丁腈橡胶与尼龙6共混性能的研究.doc

摘要
丁腈橡胶是丁二烯与丙烯腈进行乳液聚合而获得的一种通用耐油橡胶,因具有优良的耐油性和良好的物性、耐热性,成为耐油橡胶制品的标准弹性体。但是随着丙烯腈含量增加,硫化胶的耐油性、耐热性、耐磨耗性、耐气体渗透性、硬度、定伸应力、拉伸强度等性能增加,但耐寒性、弹性、抗压缩永久变形性能变差。为了考察丁腈橡胶(NBR)与聚酰胺6(PA6)共混产物综合性能变化,本文采用不同种类NBR与PA6熔融共混,考察共混过程中转矩值变化,表征了共混物的力学性能、耐溶剂性能,并且共混产物进行了红外光谱分析。研究结果表明:随着共混物体系中橡胶相含量的增加,共混物体系的熔体粘度上升。相同腈基含量下的NBR/PA6共混物的平衡转矩值随着NBR含量的增加而增加;拉伸强度随着共混物中NBR橡胶含量的上升,呈下降趋势。在相同的NBR含量条件下,拉伸强度随着腈基含量的增加而增加;红外测试结果显示NBR与PA间在高温高剪切作用下存在微化学反应,即双键与胺基间的反应;共混物体系中随着NBR含量的上升,共混物体系的体积溶胀率与质量溶胀率均呈上升趋势。
关键词:丁腈橡胶尼龙6 共混聚合物耐溶剂性能红外光谱分析
Abstract
Nitrile-butadiene rubber is obtain by butadiene and acrylonitrile in emulsion polymerization to get on a universal oil resistant rubber, because of excellent oil resistance and good property heat-resistant became the standard of oil resistant rubber elastomers. But with the content of acrylonitrile increased, the vulcanizates oil resistant, heat-resistant, abrasion resistance, gas permeability resistance, hardness, elongation, tensile strength performance increase, but the low temperature resistance,elasticity, resistance of permanent deformation pression are go bad. In order to examine prehensive performance changes of nitrile-butadiene rubber and polyamide 6(PA6) blending product, this thesis using different kind of NBR and PA6 for melt blending, inspects the changes of balance torque values during blending process. Research the mechanical properties, solvent resistance performance of blending product,and take a series of tests by infrared spectroscopic research results show that the melt viscosity is rising up with the increase of the content of the NBR . In the same content of nitrile group the NBR and PA6 balance torque values is rising up with the increase of content of basic-rubber,the tensile strengthis reduced with the increase of content of basic-rubber. .In the same content of NBR, the tensile strength is rising up with the content of nitrile group; The infrared spectroscopic analysis test results show that there have micro chemical reactions betwe