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題名 | 試材厚度、耐燃藥劑吸收量與藥效遞減對燃燒氣體毒性之影響=Effect of Board Thickness, Fire-retardant Retention and Degradation of Fire-retardant Chemical on the Toxicity of Combustion Gas |
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作 者 | 蔡維鈞; 王松永; 蔡金木; | 書刊名 | 林產工業 |
卷期 | 20:2 2001.06[民90.06] |
頁次 | 頁153-163 |
分類號 | 436.188 |
關鍵詞 | 燃氣毒性; 生物試驗; 耐燃藥劑; 藥效經久變化; 吸收量; Semi-interpenetrating polymer networks; Polyurethane; Nitrocellulose; Adding sequence of components; Wood coatings; |
語文 | 中文(Chinese) |
中文摘要 | 為維護生命安全,評估燃氣毒性有其必要性。故須了解因試材條件的變化而改變的燃燒性和煙毒性。本研究目的係探討試材厚度、耐燃劑吸收量及藥效經久變化等三項因子對燃氣毒性之影響。結果發現:1.未燒穿的試材(9mm以上)會因厚度增加而降低燃燒損失,燃氣毒性亦會隨之下降;燒穿的試材(7mm以下)燃燒損失並不大,但表現較大的毒性,顯示此時不能單由燃燒損失來判斷毒性,燃燒氣體生成速率的考量更為重要。2.在耐燃藥劑吸收量增加的初期(藥劑濃度0~10%),對燃燒重量損失率和小白鼠活動停止時間皆有顯著的正面效果。而在更高吸收量的範圍中(15%~20%),燃燒重量損失率的降低會趨緩,而小白鼠活動停止時間的延長效果有減少的現象。顯示耐燃效應與有害燃氣的抑制性須在吸收量上尋求一均衡點。3.耐燃處理材隨著氣乾時間延長,試材藥劑單位吸收量之耐燃效果會下降,而小白鼠活動停止時間會明顯延長,顯示藥效確實減低。就燃燒氣體毒性而言,藥效下降產生的正面效果,顯然大於耐燃效應帶來的負面效果。 |
英文摘要 | The PU-NC semi-interpenetrating polymer networks (semi-IPNs) made from blown castor oil (BCO) based polyurethane (PU) and nitrocellulose (NC) under NCO/OH=1.2(molar ratio) and PU/NC=70/30, 50/50, 30/70 (by weight) respectively, were prepared by sequential polymerization method for wood coatings. To investigate the effects of adding sequence of components on the properties of PU-NC semi-IPNs wood coatings, two kinds of adding sequence were examined in this study. The results indicated that under the same formulations of PU-NC semi-IPNs, the degree of interpenetrating between PU and NC, tensile strength, hardness, lightfastness, heat resistance and solvent resistance of films of NC→BCO→PTDI sequence were better than those of BCO→PTDI→NC sequence, while the viscosity, drying time, and gel time of coatings, were not different significantly. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。