کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1793689 1023681 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal thickness of melt-grown isotactic polybutene-1 tetragonal phase
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Crystal thickness of melt-grown isotactic polybutene-1 tetragonal phase
چکیده انگلیسی
Melt-crystallized isotactic polybutene-1 (it-PB1) has been investigated over a range of crystallization temperatures from 40 to 90 °C, using small angle X-ray scattering and density measurements. The lamellar crystal thickness demonstrates two linear dependences on inverse supercooling, with a transition from one dependence to the other at about 65 °C. Each of the two dependences is in accordance with the nucleation theory in the high and low ranges of supercooling. The chain folding free energy determined for the low supercooling range is larger than that determined for the high supercooling range. Possible mechanisms for the transition are discussed, taking account of the entropy of chain folding directions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 311, Issue 3, 15 January 2009, Pages 564-567
نویسندگان
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