加工性--热塑性聚氨酯薄膜开发的关键

热塑性聚氨酯(TPU)薄膜是塑料薄膜中的新产品.生产TPU薄膜需要可直接用来加工薄膜的TPU粒料作原料,优质的TPU粒料不仅要具备良好的材料本体性能,更需具有良好的薄膜加工性能.     

电子自旋共振在橡胶研究中的应用

综述了电子自旋共振在橡胶的合成、加工和应用领域的应用现状及其发展前景。     

加工助剂ZD-4的基本特性及应用研究

介绍了加工助剂ZD－4的基本特性，并在NR中进行了应用研究，试验结果表明，加工助剂ZD－4作为复合加工助剂对改善橡胶的加工特性有显著的效果，同时具有抗硫化返原性，可节省能耗，对硫化胶物性影响不大，是值得推广应用的综合效果较好的加工助剂。     

Acetyl‐capped paraformaldehyde as crosslinking agent for BMI‐modified novolac resin for resin transfer molding

Paraformaldehyde was end‐capped with acetyl groups and was applied as a crosslinking agent for a bismaleimide (BMI)‐modified novolac resin system. The processibility of the resin system containing 5 wt % crosslinking agent still met the need for resin transfer molding (RTM), whereas the thermomechanical properties of crosslinked resin improved significantly. The composites based on the resin system and woven glass fabric showed better flexural strength, modulus, and higher retention rates at 200 and 300°C than that based on a resin system without acetyl‐capped paraformaldehyde. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1265–1271, 2002     

加工助剂ZD-4在全钢载重子午线轮胎三角胶中的应用

摘要：研究加工助剂ZD-4在全钢载重子午线轮胎三角胶中的应用。结果表明，加工助剂ZD-4能够显著提高胶料中炭黑的分散性，改善胶料的挤出性能，提高硫化胶抗硫化返原能力，减少三角胶半成品喷霜现象的发生，但对硫化胶耐热老化性能和耐疲劳性能稍有不利影响；使用加工助剂ZD-4的成品轮胎耐久性能和高速性能提高。     

不同牌号ESBR的性能特点及应用

介绍不同牌号乳聚丁苯橡胶的性能特点及应用.SBR1502胶料的焦烧时间比SBR1500胶料有所缩短,硫化速度稍慢;SBR1507具有优异的加工性能;SBR1516胶料的硫化速度比SBR1502胶料稍慢,但加工性能较好,具有突出的抗湿滑性能;SBR1721胶料的硫化速度比SBR1712胶料慢,具有优异的抗湿滑性能;与非充油胶相比,充油胶具有加工性能好、生热低和耐磨性能好等特点,可降低生产成本.     

不同牌号EPDM加工性能和物理性能研究

研究2个牌号(K8340A和K778Z) EPDM的加工性能和物理性能.结果表明:K8340A混炼胶的门尼粘度高于K778Z混炼胶,两种胶料的焦烧时间和正硫化时间接近;K8340A和K778Z混炼胶均表现出剪切变稀行为,K8340A混炼胶表现更显著;随着填充量的增大,EPDM硫化胶100％定伸应力略有增大,拉伸强度、拉断伸长率和撕裂强度减小;与K778Z硫化胶相比,K8340A硫化胶的100％定伸应力和拉伸强度相差不大,撕裂强度和拉断伸长率略低,压缩永久变形明显较小.     

环保芳烃油对溶聚丁苯橡胶工艺性能的影响

研究几种环保芳烃油（TDAE）对溶聚丁苯橡胶（SSBR）工艺性能的影响,并与芳烃油（DAE）进行对比。试验结果表明：以TDAE替代DAE,随着油品运动粘度或芳烃含量的增大,SSBR生胶及混炼胶的门尼粘度先减小后增大;胶料的门尼焦烧时间延长,硫化速度减慢,t90随油品芳烃含量的减小而逐渐延长,自粘性较好,出口膨胀率减小;硫化胶的物理性能无明显差异。     

Melt processability of polytetrafluoroethylene: Effect of melt treatment on tensile deformation mechanism

It is widely accepted that the melt processibility of polytetrafluoroethylene (PTFE) is poor. In this article, a high‐molecular‐weight PTFE was extruded smoothly with a modified die; and critical shear rate could be raised to 4 s^?1, using a die with L/D (length to diameter) ratio of 200. Meanwhile, we compared the current PTFE fiber spinning method with melt spinning to investigate the effects of high‐temperature treatment on the drawability of PTFE and found that the processing sequence could play a key role. The deformation imposed before or after the high‐temperature treatment could determine whether the fibrillation can be achieved continuously and effectively. Based on the experiment phenomenon, together with the results of differential scanning calorimetry, X‐ray diffraction, and scanning electron microscopy characterization, we proposed a model to describe the submicron structural change of PTFE during extension. From this model, the fundamental mechanism for the poor melt processibility of PTFE was elucidated. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

几种增粘树脂在全钢载重子午线轮胎胶料中的应用

研究了辛基酚醛树脂、叔丁基酚醛树脂、ＴＫＭ－Ｍ和Ｋｏｔｅｓｉｎ等增粘树脂对全钢载重子午线 轮胎胶料的增粘效果、硫化特性、工艺性能及硫化胶物理性的影响。试验结果表明,加入增粘树脂后可明显提高胶粘的粘生及粘性保持率、同时胶料的门尼粘度降低,硫化速度加快,硫化胶的３００％定伸应力下降,扯断伸长率相扯断永久变形增大。ＴＫＭ－Ｍ树脂和Ｋｏｔｅｓｉｎ树奚的综合性能最佳。