화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.24, No.4, 313-321, December, 2012
DOI10.1007/s13367-012-0038-6  Export Citation
Morphological similarity of a tri-block copolymer processed at ambient and elevated temperatures
Sebnem Inceoglu, Taner Aytun1, Yusuf Z. Menceloglu1, lIhan Özen1, †, and Metin H. Acar†
  • Chemistry Department, Istanbul Technical University, 34469 Maslak Istanbul, Turkey
  • 1Faculty of Engineering and Natural Sciences, Materials Science and Engineering Program, Sabanc University, 34956 Orhanl Tuzla Istanbul, Turkey
E-mail:,
We investigated the effect of temperature on the morphology of a tri-block copolymer (BCP) processed in a capillary rheometer. The material used was a polystyrene-b-poly(2-ethylhexyl acrylate)-b-polystyrene (PS-b-PEHA-b-PS) tri-block copolymer, which was synthesized by ATRP with a molecular weight of 38.5 K consisting of 49 molar % PEHA. According to the rheological data obtained with dynamic viscoelastic oscillatory measurements, order-disorder temperature (ODT) of the BCP was measured at around 110℃. Considering this observation, the samples were studied under different temperatures and pressures (from 110°C to 28°C and from 48 to 75 bar) in capillary rheometer. All processed materials were characterized by using differential scanning calorimetry (DSC) and atomic force microscopy (AFM). It was found that all samples processed by aid of either temperature or pressure showed similar mixed morphologies (a mixture of the ordered and disordered structures i.e., the reduction of microphase separation due to processing).
Keywords:order-disorder temperature;rheology;morphology;tri-block copolymer
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