کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5203277 | 1381925 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of different coupling agents on the browning of cellulose-polypropylene composites during melt processing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effects of two coupling agents on the discoloration of cellulose/polypropylene composites during melt processing have been investigated. Composites of polypropylene, coupling agent and bleached eucalyptus Kraft pulp were produced by compounding in a twin-screw extruder. The coupling agents were maleic anhydride-grafted polypropylene (MAPP) and polyethylenimine (PEI). The discoloration was measured using standard colorimetry and the discoloration was investigated using diffuse reflectance (FTIR and UV-Visible) spectroscopy. Both MAPP and PEI increase the browning, but the two mechanisms are clearly different. PEI reacts with carbonyl compounds produced in the cellulose degradation to form new chromophores; however, no specific discoloration processes were detected in composites made with MAPP. In this case, the detrimental effect on the discolouration was related to the increased frictional degradation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 95, Issue 2, February 2010, Pages 201-206
Journal: Polymer Degradation and Stability - Volume 95, Issue 2, February 2010, Pages 201-206
نویسندگان
M.U. de la Orden, C. González Sánchez, M. González Quesada, J. MartÃnez Urreaga,