【作者】 苑伟；

【导师】 赵素合；

【作者基本信息】 北京化工大学 ， 材料加工工程， 2006， 硕士

【摘要】 聚苯乙烯-b-聚(乙烯/乙烯/丙烯)-b-聚苯乙烯(SEEPS)是日本可乐丽公司近年来开发出的一种性能优异的热塑性弹性体,它是苯乙烯-b-异戊二烯/丁二烯-b-苯乙烯嵌段共聚物(SIBS)分子中橡胶段的不饱和双键经过选择加氢而制得的。由于其具有高强度、高弹性、高伸长率、低永久变形、无毒、无味等突出特性,已开始被用来制备各种制品。本论文针对SEEPS应用中存在的问题,系统研究了SEEPS的加工性能、SEEPS/PP和SEEPS/油品/PP/纳米CaCO3共混体系的结构与性能并采用均匀设计方法设计了玩具用类皮肤材料的配方。获得的研究成果对新型热塑性弹性的广泛应用具有指导作用。论文的主要研究工作如下：1、对比了SEEPS与SEBS的结构与性能的差异,发现SEEPS的耐热性优异,吸油率适中,且具有较高的力学性能的特点；2、研究了填充油的品种和用量对SEEPS流变性能、物理机械性能、相态结构、玻璃化转变温度(Tg)的影响,并在SEEPS增塑后的微相结构变化、达到最佳效果的增塑分子机理等方面提出一些新的看法；3、研究了SEEPS的有序一无序转变过程,提出了SEEPS微相分离结构随温度升高的三阶段变化理论,并用tgδ～T和logG’～logG"间关系曲线的加以表征；4、研究了SEEPS/PP体系以及SEEPS/Oil/PP共混体系的流变性能、力学性能及相态结构,并对PP/SEEPS共混体系相态结构演变及PP对SEEPS增强机理进行了探讨。5、研究了纳米碳酸钙的混入工艺及其用量对SEEPS/Oil/PP体系力学性能的影响,并研究了共混胶料的老化性能。6、利用均匀设计方法,设计SEEPS/Oil/PP/纳米碳酸钙体系用作类皮肤玩具材料的配方,得到较好的效果。更多还原

【Abstract】 SEEPS, a new TPE with excellent properties developed by Kuraray Co., Japan in the recent years, is the hydrogenated product of ploystyrene-block-polybutadiene-block-polyisoprene-block-polystyrene (SBIS). Because of its high strength, excellent elasticity, high elongation, low permanent deformation, innoxiousness and sans taste, SEEPS has been used to make various products.In terms of the problems appearing in the applications, this paper has investigated the processing properties of SEEPS as well as structures and properties of SEEPS/PP and SEEPS/Oil/PP/nano-CaCO3blends. Through Uniform Design, a new method for formula developing, we have also made out an optimum formula for skin-like toy materials. The conclusions drawn here are of great significance to the application of this new TPE. What we have done in the paper mainly focuses on six aspects as followed:1. Comparisons have been drawn between the structures and properties of SEBS and those of SEEPS, which reveal that SEEPS has better heat resistance, higher mechanical properties and moderate oil absorption ratio.2. Effects of oil types and amounts have been investigated on the rheological behaviors, morphologies, and glass transition (Tg) of SEEPS. Some new ideas have been also brought forward on the transformation of micro-phase separation structures and the plasticizing mechanisms after SEEPS is blended with extender oil.3. The order-disorder transition (ODT) of SEEPS has been investigated via tgδ-T and logG’-logG" plots, and it has been found that the micro-phase separation structure of SEEPS will transform in three states with the increase of temperature from160℃to220℃.4. The rheological behaviors, mechanical properties and morphologies of SEEPS/PP and SEEPS/oil/PP blends have also been investigated via TEM and SEM. The morphological evolvement of SEEPS/PP blends with different compositions as well as the reinforcement mechanism of PP thereinto has been also discussed in the thesis.5. The mixing procedures of CaCO3with the SEEPS/Oil/PP blends and effects of CaCO3amounts on the mechanical properties as well as aging properties of the blends have been also investigated.6. Finally, the method of Uniform Design has been made use of to develop formulas for the blends of SEEPS/Oil/PP/nano-CaCO3. An optimum formula for skin-like toy materials has been worked out, which needs to be verified by further experiments before put into practical manufacture.更多还原