کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9559386 1381167 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A critical evaluation of reaction calorimetry for the study of emulsion polymerization systems: thermodynamic and kinetic aspects
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
A critical evaluation of reaction calorimetry for the study of emulsion polymerization systems: thermodynamic and kinetic aspects
چکیده انگلیسی
Protocols were examined for the measurement of rates and enthalpies of polymerization (ΔHp) using reaction calorimetry. ΔHp was determined to be 70.2 kJ mol−1 for a series of seeded styrene emulsion polymerizations under typical emulsion conditions, in good agreement with literature values. However, there was a significant deviation from this value for small-particle systems, which is ascribed to surface effects, i.e. environmental effects on ΔHp. Careful comparison between rate data obtained by calorimetry and by dilatometry leads to recommended procedures for obtaining reliable and accurate rate data using the former technique.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 2, 12 January 2005, Pages 285-294
نویسندگان
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