The Order－Disorder Transition Of Poly(styrene -block- ethylene / butylene -block- styrene) / Polystyrene Blends

• Main Author: 熊明恕
• Other Authors: 丁大文
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/74007639007469703942

碩士 === 逢甲大學 === 紡織工程學系 === 89 === The order-disorder transition of block copolymer SEBS and it’s homopolymer PS blends was investigated in this study. The KRATON G, produced by Shell Company, and PS was made into the thin film in the experiment. The differential scanning calorimetry (DSC) and the dynamic mechanical analysis (DMA) was used to find out the order-disorder transition temperature (TODT) of the SEBS/PS blend. The experiment results shown that macrophase separation occurs when the SEBS/PS blend ratio was more than 70/30. In the DSC plots, we find the TODT would be increasing as the PS increasing. In this paper we heve shown that plots of dynamic storage modulus (E¢) versus temperature (T), frequencies (ω), or dynamic loss modulus (E²) are effective in determining the TODT. And the TODT also increased when the PS ratio increased in the SEBS/PS blend system.