کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1484545 991634 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular mobility of poplar cell wall polymers studied by dielectric techniques
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Molecular mobility of poplar cell wall polymers studied by dielectric techniques
چکیده انگلیسی

In this work, thermally stimulated currents (TSC) analyzes combined with dynamic dielectric spectroscopy (DDS) have been applied to the investigation of polymers’ molecular mobility involves in poplar cell wall. The molecular origin of the various dielectric relaxations has been determined. Cellulose and lignin effects in wood dielectric response were distinguished. The correlation between results obtained by both dielectric methods allows us to follow molecular mobility involved in delocalized movement as primary relaxation mode. For these two major components of wood, the evolution of relaxation times involve in α-relaxation mode is explained using the strong/fragile pattern. We compared the cellulose and lignin in situ and ex situ responses to interpret wood compound behavior. The importance of structural wood interactions which modified the molecular mobility of polymer components will be underlined.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 27, 1 June 2008, Pages 3207–3214
نویسندگان
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