本研究係以過氧化二苯甲醯為化學起始劑，甲基丙烯酸及丙烯酸為單體，與聚丙烯纖維行接枝共聚合反應，探討不同溶劑(甲苯、二甲苯、氯仿、二氯乙烷)的添加對接枝反應動力學之影響。其中改變溶劑種類、濃度及接枝溫度等條件進行加工，探討接枝時溶劑添加所需的活化能、接枝反應動力學、接枝反應依存級數及向溶劑之鏈轉移常數。由實驗結果顯示，以甲基丙烯酸及丙烯酸為單體進行接枝，溶劑濃度均以25g/L具有較佳接枝率，但濃度過高時，接枝率反呈下降。且接枝率皆隨接枝溫度的升高而增加，當溶劑溶解參數愈接近聚丙烯纖維之溶解參數時，接枝所需的活化能較低，其中以二氯乙烷為溶劑時，接枝所需的活化能最低。另於甲基丙烯酸及丙烯酸接枝反應系統時，接枝反應速率式分別為Rp=k[MAA]0.72 [BPO]1.00與Rp=k[AA]0.91 [BPO]0.17。至於Cs的大小依序為二甲苯>甲苯>氯仿>二氯乙烷。
In this study, the grafting of methacrylic acid and acrylic acid onto polypropylene fibers using benzoyl peroxide as a chemistry, initiator has been investigated. The influence of different solvent ( Toluene, Xylene, Chlorofonn, Dichloroethane ) on the kinetics of the reactions were studied. The activation energy, kinetics of the reactions, dependence of rate of grafting on the monomer and initiator concentrations and chain transfer constant for solvent on the grafting yield of grafted fibers in the presence of solvent at different conditions of grafting will be examined. The results indicated that the better grafting yield occurred at solvent concentration of 25g/L at methacrylic acid and acrylic reaction systems. In general, the lower activation energy could be achieved if the solvent’s solubility parameter closed to the polypropylene fibers, especially the dichloroethane. In the methacrylic acid and acrylic acid reaction systems, the dependence of rate of grafting on the monomer and initiator concentrations are Rp = k[MAA]0.72[BPO]1.00 and Rp> =k[AA]0.91[BPO]0.17 respectively
