国外热塑弹性体的进展

本文综述介绍了国外热塑弹性体的进展，包括聚烯烃、苯乙烯、聚氮酯、聚酯、聚酰胺五大系列热塑弹性体。     

动态硫化EPDM/PP共混型热塑性弹性体的流动性

研究了动态硫化EPDM／PP共混型热塑性弹性体的流动性。结果表明：选择合适的橡胶及塑料品种、橡塑共混比、软化剂用量及改性剂，可使物理力学性能良好的EPDM／PP共混胶获得较好的流动性。     

Characterization of epoxidized natural rubber/ethylene vinyl acetate (ENR‐50/EVA) blend: Effect of blend ratio

Epoxidized natural rubber/Ethylene vinyl acetate copolymer (ENR‐50/EVA) blends with different ratios were prepared by using a Haake internal mixer. The effect of the blend ratio on the processing, tensile properties (such as tensile strength, elongation at break, Young's modulus and stress–strain behavior), morphology, dynamic mechanical properties, and thermal properties has been investigated. The tensile properties increase with the increase of EVA content, whereas the stabilization torque increases with the increase of ENR‐50 content in the blend. In 40:60 and 50:50 blend of ENR‐50/EVA, both the phases exist as continuous phases, producing a co‐continuous morphology. At these blend ratio, the drastic change in properties were noted, indicating that the phase inversion occurs. The results on dynamic mechanical properties revealed that the blends are compatible. Blending of ENR‐50 and EVA lead to the improvement in thermal stability and 50:50 blend ratios is the most stable blend. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1504–1515, 2006     

阻燃协效剂对PVC/PNBR共混型热塑性弹性体性能的影响

以PVC和粉末丁腈橡胶（PNBR）为主体材料，氢氧化镁为阻燃剂，制备PVC／PNBR共混型热塑性弹性体，研究阻燃协效剂三氧化二锑、硼酸锌、七钼酸铵、氧化锌和二氧化锰对弹性体性能的影响。结果表明，当PVC、PNBR、邻苯二甲酸二辛酯和氢氧化镁的用量分别为77，23，50和31份时，PVC／PNBR共混型热塑性弹性体性能良好；氢氧化镁的用量对弹性体氧指数基本无影响；在弹性体中分别单独使用4．6，6．2，1．5和6．2份三氧化二锑、硼酸锌、七钼酸铵和氧化锌时，弹性体的氧指数明显提高，综合物理性能较好，但二氧化锰协同效果不好。     

基于模拟恶劣运行环境下的电动汽车直流充电枪发热行为的检测方法及评价研究

随着电动汽车的大量普及推广,新型电动汽车充电电缆作为电动汽车和充电桩之间的用于传输电能的载体,对其安全性能进行研究具有重要意义。本试验选取包括TPE、TPU两种不同护套材料,锡青铜镀银、黄铜镀银两种插针材质的充电电缆进行研究。探究环境粉尘、高温湿度和多次插拔对充电枪发热情况的影响。结果显示,粉尘污染试验对充电枪的表面发热情况影响不大,枪体内部温度略有升高。高温湿环境会加速充电枪的温升过程,但是对充电枪端子的温升影响不大,枪体、电缆表面温度有一点上升。多次插拔试验对充电枪发热情况有明显的促进作用,温度升高约12K。     

Compatibilisation of various PLA/thermoplastic elastomer blends with diisocyanate coupling agent

Poly(lactic acid) (PLA) is characterised by its inherent brittleness, a detrimental feature for the production of durable bioplastics. PLA has been toughened by a low amount (12?wt-%) of various thermoplastic elastomers (TPE) including poly(ether-b-ester) (PEEs), poly(ether-b-amide) (PEBA) and poly(ether-b-urethane) (PEU). PLA–TPE blends were prepared by using a twin screw extruder. Ductility and impact resistance can be slightly improved with the incorporation of TPEs but but PEBA appears the most efficient. Reactive compatibilisation has been performed with the addition in the melt of a low amount (2?wt-%) of 4,4-methylene diphenyl diisocyanate. All compatibilised blends exhibit high toughness with similar ductility. These blends preserve good stiffness and high tensile strength. Compatibilised PEBA blends can be considered as super tough poly(lactic acid) materials. This work confirms that the flexibility of the elastomer together with the quality of the interfacial adhesion between the rigid (PLA) and the soft (TPE) phases are the primary factors influencing the toughness.     

TD网络TCP性能优化

本文旨在从目前无线网络对业务承载的需求出发,提出传统TCP协议并不能适应无线网络传输环境的观点,需要有相关的技术进行补充,从而引出TPE技术。正文重点介绍了TPE技术的实现原理、数学原理以及在实际中的解决方案,并对TPE技术的前景进行了展望。     

开炼机与密炼机动态硫化制备NBR／PVC热塑性弹性体的研究

对比并讨论了采用开炼机动态硫化与采用密炼机动态硫化制备的NBR／PVC热塑性弹性体的物理机械性能、流变性能、形态结构,通过对试验结果的分析,认为动态硫化应以采用高剪切、高温密炼机为宜。     

TD-SCDMA网络TCP性能优化技术

3G时代为人们提供了更高的无线业务承载带宽,互联网的发展引入了更多的业务需求,如何最大限度的提高和保证端到端的服务性能,是全系统问题。在E2E解决方案中,仅依赖无线资源管理等传统算法的优化已解决不了所有的问题。而传统TCP协议并不适应无线网络的传输环境,其没有考虑无线空口环境剧烈变化,慢启动机制导致分组丢失时重传延迟大,影响用户吞吐率,严重影响用户感知。     

热塑性弹性体的配合技术

分别以配方设计要点，聚合物、增塑剂、防老剂、填充剂、短纤维、发泡剂、并用的选择几个方面较全面地介绍了热塑性弹性体的配合技术。