頁籤選單縮合
題名 | 環氧樹脂與不同Novolac樹脂混合製備聚摻合樹脂之性質=Properties of Polyblended Resins Prepared by Mixing Epoxy Resin with Different Novolac Resins |
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作者 | 朱建芳; 李文昭; | 書刊名 | 林業研究季刊 |
卷期 | 38:2 2016.06[民105.06] |
頁次 | 頁109-121 |
分類號 | 467.4 |
關鍵詞 | 環氧樹脂; 六亞甲基四胺; Novolac樹脂; 聚摻合樹脂; 三苯基磷; Epoxy resin; Hexamine; Novolac resins; Polyblended resins; Triphenylphosphine; |
語文 | 中文(Chinese) |
中文摘要 | 本研究將柳杉木粉以酚及重量比6/4之酚/雙酚A混合液為溶劑進行液化處理,所得PLW及BLW兩種液化柳杉及化石酚分別與福馬林反應合成PLW-PF、BLW-PF及PF三種novolac樹脂,另利用雙酚A與環氧氯丙烷反應合成環氧樹脂。隨後將環氧樹脂與三種novolac樹脂以等當量比混合製備聚摻合樹脂,並添加三苯基磷(Triphenylphosphine)為催化劑,六亞甲基四胺(Hexamine;Hexamethylene tetramine)為架橋劑,探討novolac樹脂種類對聚摻合樹脂性質之影響。由DSC熱分析結果顯示添加三苯基磷之聚摻合樹脂在熱掃描過程出現一個架橋反應之放熱峰,其中以PF樹脂為原料聚摻合樹脂有較高之反應性。兩種液化木材為原料之PF比較,BLW-PF所釋放之反應熱大於PLWPF。DMA熱分析結果顯示聚摻合樹脂為一均質結構體,其中以PLW-PF及BLW-PF為原料者則有較低之熱活性,較高之剛性,但架橋密度較不均勻。TGA熱分析結果顯示在400℃之前以混合PF樹脂者有較佳之熱抵抗性,在400~500℃則以PLW-PF及BLW-PF之熱抵抗性較佳。 |
英文摘要 | In this study, wood powders of Cryptomeria japonica (Japanese cedar) were liquefied with phenol and the mixture of phenol/bisphenol (6/4 in the weight ratio) as solvents to obtain the liquefied wood of PLW and BLW, respectively. Novolac resins, named PLW-PF, BLW-PF and PF, were prepared by reacting formalin with PLW, BLW and fossil phenol, respectively. Epoxy resin was synthesized by reacting bisphenol A with epichlorohydrin. The polyblended resins were prepared by mixing stoichiometric amount of epoxy resin and novolac resin. In addition, triphenylphosphine and hexamine (hexamethylene tetramine) were added as a catalyst and cross-linking agent, respectively. The infl uence of the kind of novolac resin on the properties of polyblended resins was investigated. The results of DSC thermal analysis showed that polyblended resins mixing with triphenylphosphine presented an exothermic peak due to cross-linking reaction during the heat scanning. Among them, the polyblended resin that used PF resin as the raw material had the highest reactivity. Comparison between two kinds of liquefied wood, BLW-PF released more reaction heat than PLW-PF. The results of DMA thermal analysis indicated that polyblended resins had a homogeneous structure. Using PLW-PF and BLW-PF as raw materials had the lower thermal activity and higher stiffness but had more ununiform cross-linking density than that of PF. The results of TGA thermal analysis displayed that polyblended resin with PF resin had a superior heat resistance at temperature before 400℃. However, it was better for PLW-PF and BLW-PF at temperature between 400℃ and 500℃. |
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