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通过经验公式对硫化橡胶老化试验数据进行拟合,然后根据经验公式的拟合值,用EXCEL中的图表工具作出硫化橡胶的老化动力学变化曲线,以期反映硫化橡胶的动力学变化规律。 相似文献
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本文研究了将虚拟裂纹闭合法应用ANSYS有限元计算软件,计算组合材料的应变能释放率。在有限元计算中,为了减小后处理工作量,将弹簧单元施加在裂纹尖端。在实际的有限元计算中,COMBIN14单元被用来建立有限元模型,从而将求解过程和后处理过程联系起来,自动计算出能量释放率。随后,将该方法应用于计算组合材料的应变能释放率,进行数值模拟实验。通过分析比较数值计算结果和理论值,表明该数值分析方法所计算出的应变能释放率与理论值完全符合,该数值分析方法是一种高效,精确的数值分析方法。 相似文献
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在橡胶配方设计中,有的产品除了对橡胶的机械性能和使用性能有要求外,对硫化橡胶的密度也有比较严格的要求,如用于水下的橡胶制品,橡胶的密度直接影响到特性声阻抗的大小,同时也关系到水中浮力的大小。 相似文献
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本文进行了丁腈,氯丁、天然以及氯醇/丁腈并用胶等六种实用配方硫化橡胶,在40-110℃不同温度范围内的压缩应力松驰研究。应力松弛动力学变化不能用人所共知的Maxwellian衰减公式描述,可用下列经验公式:σ/σ_0=B·exp(-kt~α)描述化学应力松驰变化,式中α用逼近法确定,在全部实验情况下得到令人满意的结果。 相似文献
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正授权公告号:CN 104292505B授权公告日:2017年2月22日专利权人:华南理工大学发明人:朱立新、郭宝春、翁佩锦本发明公开了一种纳米碲的制备及其硫化橡胶的方法。本发明以廉价的亚碲酸钠为碲源,以植物多酚为还原剂和纳米碲的修饰剂,制得多酚修饰的纳米碲;再以该纳米碲为硫化剂,配合超速促进剂,制得碲硫化橡胶。本发明纳米碲的制备方法环 相似文献
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《中国石油和化工标准与质量》2007,27(8):19-19
1GB/T528——1998《硫化橡胶或热塑性橡胶拉伸应力应变性能的测定》标准中凡是提及“扯断伸长率”的术语.均改为“拉断伸长率”。 相似文献
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以 2 ,4-二氯过氧化苯甲酰为硫化剂、 110 - 2甲基乙烯基硅橡胶为原料 ,制备出外观无瑕疵 ,邵尔A硬度 5 5~ 70度 ,最小扯断力 90~ 180N的硅橡胶胶管。讨论了补强剂、硫化剂用量及结构控制剂对产品机械性能的影响 相似文献
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热塑性硫化橡胶易与苯乙烯类弹性体等大宗弹性体产品混淆,其科学称呼是热塑性动态硫化橡胶(TPV).阐述了TPV组成、主要性能特点、制备与加工工艺、应用领域和发展前景. 相似文献
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研究了偶联剂、橡胶再生剂S及其用量对共混体系性能的影响。结果表明:只添加偶联剂可以改善共混体系冲击强度和流动性能,但拉伸强度大幅度下降;配合添加橡胶再生剂S可使硫化胶粉脱硫“细化”,进一步提高了共混体系冲击强度,且拉伸强度也有所改善。 相似文献
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硫化胶粉/PP共混材料的研究 总被引:12,自引:2,他引:10
研究了硫化胶粉/PP共混体系的力学性能,流动性能和热变形温度等。结果表明,利用硫化胶粉可以明显改善PP的冲击性能,而且胶粉粒径越小,改善的效果越显著,但共混体系的拉伸强度有所下降。胶粉含量在5%-15%时,共混体系的综合性能较好。 相似文献
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M. Mercedes Pastor-blas Jos Miguel Martí n-Martí nez John G. Dillard 《The Journal of Adhesion》1997,62(1):23-43
A synthetic vulcanized styrene-butadiene rubber (R) was treated with a halogenation agent (TCI = trichloroisocyanuric acid) to produce improved adhesion (i.e. high T-peel strength) in joints prepared with a one-component, solvent-based polyester urethane adhesive. Several amounts (0.5 to 7 wt%) of TCI solutions in ethyl acetate were applied to the rubber surface and, after T-peel tests were carried out, the surfaces of the debonded chlorinated rubber pieces were analyzed with XPS, ATR-infra-red (ATR-IR) spectroscopy, Scanning Electron Microscopy (SEM) coupled with EDX analysis, and contact angle measurements. The T-peel strength of unchlorinated rubber (0 wt% TCl) joints was small due to the migration of low molecular species (mainly microcrystalline wax) to the rubber surface during the cure of the adhesive, creating a weak layer in which the failure was produced. Chlorination with amounts of TCI up to 2 wt% produced a noticeable increase in T-peel strength, but treatment with higher amounts of TCI resulted in a decrease in joint strength. Although chlorination with TCI created chlorinated hydrocarbon groups and C-O moieties on the rubber surface, the surface in contact with the adhesive was additionally degraded and, consequently, the locus of failure of the joints varied in a manner which depended on the amount of TCI applied to the surface. Treatment with amounts of TCI up to 2 wt% did not greatly degrade the rubber surface and the mode of failure of the joint was mainly interfacial. Chlorination at higher TCI concentration produced a weak chlorinated surface layer which was was mechanically weak, facilitating the failure in this layer during the T-peel test. The thickness of the chlorinated layer created on the treated rubber is about 5 Fm, and the thickness seemed to be independent of the amount of TCI applied to the rubber surface. 相似文献
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