A comparative study of ground tire rubber devulcanization using twin screw extruder and internal mixer

Innovation in Polymer Science and Technology 2016

材料科学;化学

Ujianto, O.^1 ; Putri, D.B.^2 ; Jayatin^1 ; Awinarto, D.^1

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

Chemical Engineering, Polytechnic STMI, Jakarta, Indonesia^2

关键词: Comparative studies;    Composite tensile strength;    Control samples;    Ground tire rubbers;    Processing parameters;    Strength and elongations;    Thermomechanical process;    Twin screw extruders;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012005/pdf
DOI  :  10.1088/1757-899X/223/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Devulcanization of ground tire rubber (GTR) was done using twin screw extruder (TSE) and internal mixer (IM). Processing parameters were varied to analyze its effect on gel content. Fourier Transform Infrared Spectroscopy (FTIR) analysis was performed as qualitative technique to confirm structural change. The devulcanized rubbers with the least gel content percentage produced in both TSE and IM were then used as filler in natural rubber (NR)/coconut coir (CC) composite preparation. Effects of gel content percentage on NR/CC composite tensile strength and elongation at break were analyzed. The results show that the gel content decreased by 41% for sample processed in TSE and 50% in IM compared to control sample. Overall, the devulcanization is influenced by high energy generated by thermal or thermo-mechanical process. FTIR spectra show chemically structural changes of GTR as C=C, CH2, CH3with higher intensity for IM sample than its counterpart indicated devulcanization. The replacement of GTR to DGTR on NR/CC/GTR composites provided less network structures and resulted better tensile strength and elongation at break.