کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5200885 1502879 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polylactide/organically modified montmorillonite composites; effects of organic modifier on thermal characteristics
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Polylactide/organically modified montmorillonite composites; effects of organic modifier on thermal characteristics
چکیده انگلیسی
The effects of interspace distance and the possible chemical interactions between PLA and the organic modifier of montmorillonites, Cloisite 15A, 20A and 30B on thermal degradation of PLA in the absence and presence of water vapor were investigated by direct pyrolysis mass spectrometry, (DP-MS) in addition to XRD, TEM, DSC, TGA analyses. The DP-MS results clearly showed that the way in which the polymer was incorporated into the nanocomposite strongly depends on the mixing technique, the interspacing between the clay layers and mostly on the type of the organic modifier used. Strong evidences for interactions of the organic modifier of Cloisite 30B with PLA chains resulting in exfoliated structure were detected. In the presence of water vapor, the relative yields of products due to trans-esterification and cis-elimination reactions were diminished. Thermal degradation of PLA nanocomposites was shifted to low temperatures as the partial pressure of H2O was increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 134, December 2016, Pages 87-96
نویسندگان
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