Pressure Dependence of the Order-to-Disorder Transition in Polystyrene/Polyisoprene and Polystyrene/Poly(methylphenylsiloxane) Diblock Copolymers
العنوان: | Pressure Dependence of the Order-to-Disorder Transition in Polystyrene/Polyisoprene and Polystyrene/Poly(methylphenylsiloxane) Diblock Copolymers |
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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 |
تدمد: | 15205835 00249297 |
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