期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2013
卷号：4
期号：4
页码：571-582
出版社：University of Mohammed Premier Oujda
摘要：Castor oil (CO) based polyurethanes (IPU) were synthesized and mixed to cellulose fibers extracted from Alfa plant to prepare composites with different cellulose contents (5, 10, 15, 20, 30 and 40 wt%). Films of the composites were characterized by thermal analysis and mechanical testing. FTIR spectra showed hydrogen bonding between urethane groups and hydroxyl groups of cellulose suggesting compatibility between polymer matrix and cellulose fibers as reveled by scanning electron microscopy (SEM). The influence of cellulose content on thermal stability and mechanical properties of the composites has been studied. The mechanical testing showed optimum value of Young modulus and elongation at break at 15%wt of cellulose content. Thermal properties show an increase in Tg value and char yield with the percentage of fibers. Besides, water uptake tests showed an increase in hydrophilicity of the composites with increasing fiber amount in the matrix and swelling test demonstrates higher crosslinking density with higher content of filler
