کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1396007 984153 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanopore generation in hybrid polycyanurate/poly(ε-caprolactone) thermostable networks
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Nanopore generation in hybrid polycyanurate/poly(ε-caprolactone) thermostable networks
چکیده انگلیسی

Novel nanoporous thermosetting films were obtained from thermostable polycyanurate (PCN)-based hybrid networks synthesized by polycyclotrimerization of cyanate ester of bisphenol E in the presence of a modifier reactive toward cyanate groups, i.e. dihydroxy-telechelic poly(ε-caprolactone) (PCL). The nanoporous structure was generated in PCN/PCL hybrid networks after extraction of unreacted free PCL sub-chains which were not chemically incorporated into the PCN cross-linked framework. Structure–property relationships for precursory and porous PCN/PCL hybrid networks were investigated using a large array of physico-chemical techniques. The porosity associated with the networks after extraction was more particularly evaluated by SEM and DSC-based thermoporometry: pore sizes around 10–90 nm were determined along with pore volumes as high as about 0.3 cm3 g−1. Density and dielectric measurements strongly suggested the occurrence of closed pore structures. Due to their high thermal stability as investigated by TGA, nanoporous PCN/PCL hybrid cross-linked films could be considered as promising materials for potential applications as thermostable membranes.

Figure optionsDownload as PowerPoint slideHighlights
► Nanoporous thermosets are formed by extraction of free PCL from PCN/PCL networks.
► Nanopores around 10–90 nm are generated with pore volumes as high as 0.3 cm3 g−1.
► Density and dielectric measurements suggest the occurrence of closed pores.
► Porous hybrid films possess high Tg values and high thermal stability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 47, Issue 9, September 2011, Pages 1736–1745
نویسندگان
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