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題 名 | 酚液化柳杉以懸浮聚合法製作硬化圓球形PF樹脂顆粒=Cured Spherical PF Resin Beads Prepared from Phenol-liquefied Cryptomeria japonica with Suspension Polymerization |
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作 者 | 謝漢民; 李文昭; 尤昭云; 張國峻; | 書刊名 | 林產工業 |
卷 期 | 30:3 2011.09[民100.09] |
頁 次 | 頁149-156 |
分類號 | 467.4 |
關鍵詞 | 柳杉; 液化木材; 酚醛樹脂; 圓球形樹脂顆粒; 懸浮聚合法; Cryptomeria japonica; Liquefied wood; Phenol-formaldehyde resin; Spherical resin beads; Suspension polymerization; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究將柳杉木材以酚為溶劑,硫酸為催化劑進行液化處理,並將此酚液化柳杉與福馬林在安定劑聚乙烯醇(Polyvinyl alcohol; PVA)存在條件下,以懸浮聚合法製作圓球形硬化酚醛樹脂(Phenol-formaldehyde resin; PF)顆粒;由試驗結果得知,酚液化柳杉可在弱鹼性環境與甲醛藉由二階段懸浮聚合法形成圓球形硬化PF樹脂顆粒,然其樹脂顆粒之粒徑大小及分佈則受安定劑種類及添加量所影響,採用分子量較低之安定劑者,其樹脂顆粒之粒徑分佈範圍較廣,分子量較大者則粒徑較集中,而減少PVA添加量則可形成較大粒徑之樹脂顆粒。TGA熱分析顯示其熱裂解發生溫度約在170℃,較明顯之重量損失則在400-570℃,加熱至800℃之焦炭率在58.2-60.4%。 |
英文摘要 | In this study, wood of "Cryptomeria japonica" was liquefied in phenol with sulfuric acid as a catalyst. The cured spherical phenol-formaldehyde (PF) resin beads were prepared from phenol-liquefied "C. japonica" and formalin in the presence of a stabilizer, polyvinyl alcohol (PVA), with a suspension polymerization. The results show that spherical cured PF resin beads could be prepared by reacting phenol-liquefied "C. japonica" and formaldehyde with a two-step suspension polymerization under weak alkaline condition. However, the diameter and dimensional distribution of resin beads were influenced by the kind and the dosage of stabilizer. Using the PVA stabilizer with a lower molecular weight had a broad dimensional distribution of the resin beads but it had a more uniform diameter for that with larger molecular weight PVA. In the meantime, decreasing the dosage of PVA could lead the resin beads to form a larger diameter. TGA shows that the thermo-degradation of resin beads occurred at 170℃ and had more obvious weight loss at temperature between 400℃ and 570℃. The char yield at 800℃ was between 58.2% and 60.4%. |
本系統中英文摘要資訊取自各篇刊載內容。