Effect of maleated natural rubber on tensile strength and compatibility of natural rubber/coconut coir composite

Innovation in Polymer Science and Technology 2016

材料科学;化学

Ujianto, O.^1 ; Noviyanti, R.^2 ; Wijaya, R.^1 ; Ramadhoni, B.^1

Center for Polymer Technology, Agency for Assessment and Application of Technology, Banten, Indonesia^1

Chemistry Department, Islamic State University, Banten, Indonesia^2

关键词: Co-rotating twin screw extruders;    Developed model;    Interfacial bonding;    Maleated natural rubber;    Morphology analysis;    Optimum conditions;    Strength improvements;    Verification experiments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012014/pdf
DOI  :  10.1088/1757-899X/223/1/012014

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Natural rubber (NR)/coconut coir (CF) composites were fabricated using co-rotating twin screw extruder with maleated NR (MNR) used as compatibilizer. The MNR was produced at three level of maleic anhydride (MA), and analyzed qualitative and quantitatively using FTIR and titration technique. Analysis on MNR using FTIR and titration methods showed that MA was grafted on NR chain at different percentage (0.76, 2.23, 4.79%) depended on MA concentration. Tensile strength data showed the best tensile strength was produced at 7 phr of MNR with 1 phr of MA level in MNR resulting 16.4 MPa. The improvement of compatibilized samples were more than 300% compare to uncompatibilized composite attributed to better interfacial bonding. The improvement on tensile strength was significantly influenced by MNR level and amount of MA added to produce MNR, as well as their interaction. The optimum conditions for producing NR-CF composite were predicted at 6.5 phr of MNR level with 1 phr of MA concentration added in MNR production, regardless screw rotation settings. Results from verification experiments confirm that developed model was capable of describing phenomena during composite preparation. Morphology analysis using scanning electron microscopy shows smooth covered fiber in compatibilized samples than that of without MNR. The morphology also showed less voids on compatibilized samples attributed to better interfacial bonding leading to tensile strength improvement.