Effect of Temperature, Time and Diimide/Rubber Ratio on the Hydrogenation of Liquid Natural Rubber by Response Surface Methodology
| Autor: | Nur Hanis Adila Azhar, Fazira Firdaus, Siti Fairus Mohd Yusoff, Siti Efliza Ashari, Mohamad Shahrul Fizree Idris |
|---|---|
| Přispěvatelé: | Ministry of Higher Education(MOHE), Universiti Kebangsaan Malaysia (UKM) |
| Rok vydání: | 2019 |
| Předmět: |
010407 polymers
Thermogravimetric analysis Composite number Analytical chemistry liquid natural rubber 02 engineering and technology Hydrazide 01 natural sciences response surface methodology chemistry.chemical_compound Natural rubber Diimide Response surface methodology Fourier transform infrared spectroscopy QD1-999 Thermal decomposition General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences central composite rotatable design optimization hydrogenation Chemistry chemistry visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Indonesian Journal of Chemistry, Vol 19, Iss 4, Pp 882-891 (2019) Indonesian Journal of Chemistry; Vol 19, No 4 (2019); 882-891 |
| ISSN: | 2460-1578 1411-9420 |
| DOI: | 10.22146/ijc.36706 |
| Popis: | Hydrogenated liquid natural rubber (HLNR) was synthesized from liquid natural rubber (LNR) by thermolysis of p-toluenesulfonyl hydrazide (TSH). The HLNR structure was characterized by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. Thermogravimetric analysis (TGA) showed that the HLNR had higher decomposition temperature compared to LNR. A response surface methodology (RSM) based on a central composite rotatable design (CCRD) with five-level-three-factors was used to optimize the main important reaction parameters, such as the TSH:LNR weight ratio (1–3), reaction temperature (110–150 °C), and reaction time (1–8 h). A quadratic model was developed using this multivariate statistical analysis. Optimum conditions for the non-catalytic hydrogenation of LNR using TSH were obtained; an LNR hydrogenation percentage of 83.47% at a TSH:LNR weight ratio of 1.41, a reaction temperature of 118.11 °C, and a reaction time of 3.84 h were predicted. The R2 value of 0.9949 indicates that the model provides data that are well matched with those from the experiment. |
| Databáze: | OpenAIRE |
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