%0 Journal Article
%T Dynamic mechanical properties and characterization of chemically treated sisal fiber
%A M Bassyouni
%J Journal of Reinforced Plastics and Composites
%@ 1530-7964
%D 2018
%R 10.1177/0731684418798049
%X The incorporation of sisal fiber as reinforcement materials for polymers will be advantageous if it is synthesized and manufactured perfectly. In this study, surface modification using polymeric diphenylmethane di-isocyanate and gamma-aminopropyltriethoxysilane was applied for further amelioration of polypropylene每sisal bonding. Surface morphology, thermomechanical properties, thermal stability, and chemical bonding were investigated using scanning electron microscopy, dynamic mechanical analysis, thermogravimetric analysis, and Fourier transform infrared spectroscopy, respectively. A number of mathematical models were studied for predicting the effect of untreated and modified sisal fiber loadings on the mechanical properties of biocomposites. Polymeric diphenylmethane di-isocyanate showed a significant improvement on the thermal and mechanical properties of polypropylene biocomposites. Fourier transform infrared spectroscopy analysis of polypropylene每sisal biocomposite showed the formation of urethane group at 3333 cmˋ1 in the presence of polymeric diphenylmethane di-isocyanate. Glass transition temperature of polypropylene每sisal was slightly increased to 6.8∼C by chemical modification with polymeric diphenylmethane di-isocyanate. Yield strength of polypropylene每sisal (30 wt%) was enhanced by more than 50% with polymeric diphenylmethane di-isocyanate chemical treatment. Halpin每Tsai and Nielsen theoretical mathematical models showed a good agreement with experimental results of polypropylene每untreated sisal and polypropylene每treated sisal, respectively
%K Biocomposites
%K sisal fiber
%K polypropylene
%K dynamic mechanical analysis
%K chemical treatment
%K models
%U https://journals.sagepub.com/doi/full/10.1177/0731684418798049