The effect of modified ijuk fibers to crystallinity of polypropylene composite

Innovation in Polymer Science and Technology 2016

材料科学;化学

Prabowo, I.^1 ; Nur Pratama, J.^1 ; Chalid, M.^1

Department Metallurgy and Material Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok

16436, Indonesia^1

关键词: Crystallinities;    Environmental friendly materials;    Environmental issues;    Fourier transform infrared;    Oxidative fragmentation;    Polypropylene composite;    Poor crystallinity;    Sodium hypochlorites;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012020/pdf
DOI  :  10.1088/1757-899X/223/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Nowadays, plastics becomes concern associated with its degradation and environmental issues. It has led studies to develop an environmental-friendly material. To minimize the impact of those problems, recently the usage of natural fibers as a filler are introduced because of biodegradability and availability. The promising natural fiber is "ijuk" fiber from Arenga pinnata plant as a filler and polypropylene (PP) polymer as a matrix. Unfortunately, the natural fibers and polymers have the different properties on which polymers are polar while natural fibers are non-polar so that reducing the compatibility and resulting the poor crystallinity. To enhance the compatibility and crystallinity, ijuk fibers were prepared by multistage treatments including alkalinization with 5 and 10% sodium hydroxide (NaOH), oxidation with 3 and 6% sodium hypochlorite (NaClO) and hydrolysis with 20% sulphuric acid (H2SO4) in sequences. The purposes of multistage treatments are to remove the components such as lignin, wax, hemicellulose, to cause an oxidative fragmentation of remaining lignin and to annihilate the amorphous parts respectively. Fourier-Transform Infrared (FTIR) confirms the compatibility meanwhile Differential Scanning Calorimetry (DSC) reveals the crystallinity and Scanning Electron Microscope (SEM) displays surface morphology of polypropylene. The experiments were revealing that the effects of "ijuk" fibers by the multistage treatments of 5 and 10% NaOH resulting the crystallinity of polypropylene around 31.2 and 27.64% respectively compared to the crystallinity before adding the "ijuk" fibers for 16.8%. It indicates that the entire treatments increasing the compatibility and crystallinity of polypropylene. In addition, the use of 5% NaOH offers the better crystallinity than non-treated polypropylene. The experiments conclude that by adding alkalinized "ijuk" fibers of multistage treatments can increase the compatibility and crystallinity of polypropylene.