廖文彬2006-07-252018-06-282006-07-252018-06-282004http://ntur.lib.ntu.edu.tw//handle/246246/12470本報告將報導研究計劃「機械鬆弛定量分析模式建立：填充顆粒效應」研究的成果。採用添加碳黑的天然橡膠為系統。添加碳黑會使橡膠產生物理交連，程度隨碳黑量增加上升，但橡膠的化學交連則沒有顯著變化。使用DMA 量測頻率為1Hz 不同溫度下的機械鬆弛行為，顯示分子運動受到交連點的限制。進一步以Havriliak-Negami(HN)方程式分析機械鬆弛譜，可知碳黑添加越多時，分子運動所需的活化能越高，熵值的變化也越大。其原因可由交連對分子運動及分子鏈構形的影響來加以說明。由HN 方程式參數α及αβ的分析中可發現交連現象主要影響分子鏈間(inter-chain)的運動，因此造成α值的減小。但分子鏈內(intra-chain) 運動則沒有受到很大的影響，因而αβ的變化並沒有一定的趨勢。The effect of carbon black on the dynamic mechanical relaxation of DCP-cured natural rubber utilizing Dynamic Mechanical Analyzer (DMA) was studied in this work. Adding carbon black increased physical cross-links, while the chemical cross-link density basically maintained the same. From the result of DMA, it was clear the molecular motions were influenced by cross-linking. Further analyzing by Havriliak-Negami (HN) equation, it was found that the more the amount of carbon black, the larger activation energy and the change of entropy of molecular motions. This could be explained by the influence of cross-link density on molecular motions and chain conformations. The analysis of parameters, α and β of HN equation, revealed the cross-linking influenced the inter-chain molecular motions obviously, but not the intra-chain ones. Thus, α decreased with the increase of cross-link density. However, the change of αβ did not have a trend.application/pdf77854 bytesapplication/pdfzh-TW國立臺灣大學材料科學與工程學研究所天然橡膠碳黑機械鬆弛分析natural rubbercarbon blackdynamic mechanical analysisreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/12470/1/922216E002016.pdf