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Pressure Dependence of the Order-to-Disorder Transition in Polystyrene/Polyisoprene and Polystyrene/Poly(methylphenylsiloxane) Diblock Copolymers

التفاصيل البيبلوغرافية
العنوان: Pressure Dependence of the Order-to-Disorder Transition in Polystyrene/Polyisoprene and Polystyrene/Poly(methylphenylsiloxane) Diblock Copolymers
المؤلفون: Guido Meier, R. Oser, Ingo Alig, M. Junker, P. Bösecke, Bernd Stühn, B. Steinhoff, M. Rüllmann, M. Wenzel, Olivier Diat, H.B. Stanley
المصدر: Macromolecules. 31:36-40
بيانات النشر: American Chemical Society (ACS), 1998.
سنة النشر: 1998
مصطلحات موضوعية: Materials science, Polymers and Plastics, Scattering, Transition temperature, Organic Chemistry, Analytical chemistry, Pressure dependence, Inorganic Chemistry, chemistry.chemical_compound, chemistry, High pressure, Polymer chemistry, Materials Chemistry, Copolymer, Lamellar structure, Polystyrene, Bar (unit)
الوصف: The pressure dependence of the order-to-disorder transition in a polystyrene/polyisoprene (PS/PI) (M = 17 000) and a polystyrene/poly(methylphenylsiloxane) (PS/PMPS) (M = 29 600) diblock copolymer of symmetric composition has been studied using small-angle X-ray scattering. The order−disorder transition is investigated with a temperature resolution of 0.1 K. The transition can be resolved in a two-step process with a roughening of the interface preceding the breakdown of the lamellar order. For both systems a pressure-induced ordering transition is observed at constant temperature. The application of small pressures leads to a decrease of the transition temperature for both systems. High pressure shows the opposite effect. The minimum transition temperature for the PS/PI is located around p = 8 bar.
تدمد: 1520-5835
0024-9297
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::77128e9926af9df4ebaebb182005f553
https://doi.org/10.1021/ma970659y
رقم الأكسشن: edsair.doi...........77128e9926af9df4ebaebb182005f553
قاعدة البيانات: OpenAIRE
الوصف
تدمد:15205835
00249297