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題 名 | Syntheses and Properties of Polyesterether-modified Urethane Prepolymers and Their Corresponding Crosslinked Films=含聚酯醚類聚脲酯與其交鏈皮膜之合成和性質 |
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作 者 | 楊金平; 吳文麟; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 17:2 1986.03[民75.03] |
頁 次 | 頁125-131 |
分類號 | 467.42 |
關鍵詞 | 皮膜; 交鏈; 合成; 性質; 聚酯醚類聚; 酯; |
語 文 | 英文(English) |
中文摘要 | 本實驗是以不同比例的末端酵基聚酯醚(PEE)與甲苯二異酸鹽(TDI)及三羥甲基丙(TMP)合成?脂預聚合體,然後與當量的異氰酸鹽再生體(Desmodur AP-Stable)經溶劑混合焙烤形成架橋聚?脂皮膜,路此皮膜之機械性質及其應用於實用聚?酯漆包線之特性。PEE是由二丙撐二醇已二酸聚縮而成。實驗結果顯示,經PEE化學改質的TDI-TMP架橋聚?脂酯皮膜,其機械性質隨PEE之增加由硬脆變為硬?,然後軟?至軟弱。斷度則初先增加然後漸小,伸長率則大致與斷裂強度呈反向趨勢變化,惟當TMP/TDI/PEE=1/1/0.5時上述情形呈現逆回現象,表示此時其聚分散度最小,架橋皮膜組織最均勻。PEE化學改質的TDI-TMP預聚合體適用於製備實用漆包線皮膜之莫耳比例為TMP/TDI/PEE(#1000)=1/1/0.7-0.9,其實用範圍內之架橋薄膜之機械性質是:斷裂強度70-120 kg/c□,伸長率70-130%。 |
英文摘要 | Trimethylol propane (TMP), toluene diisocyanate (TDI), and polyesterether (PEE) were reacted in various molar ratios to produce TMP-TDI-PEE urethane prepolymers and them mixed with equivalent isocyanate generator (Desmodur AP-Stable) in a mixture of m-cresol and naphtha to give polyurethane varnishes which finally became crosslinked films by the casting method. The mechanical properties of the PEE-modified polyurethane corsslinked films and the practicability of magnet wires coated with them were studied in this article. Hydroxyterminated PEE was prepared by polycondensation of dipropylene glycol with adipic acid. Two different PEEs used in this experiment for chemical modification were PEE(#640) and PEE(#1000). In both cases of adding PEE(#640) and PEE(#1000) with increasing their molar ratios, the samples changed their mechanical properties from hard-brittle, through soft-tough, into soft-weak: strength at break initially increased and then decreased; elongation was consitently contrary to strength at break. However, for PEE-modified polyurethane crosslinked films, the mechanical properties showed a local maximum at TMP/TDI/PEE=1/1/0.5, which indicates their homogneous structures due to lease polydispersity. The molar ratios of PEE-modified urethane prepolymers which are suitable for manumolar ratios of PEE-modified urethane prepolymers which are suitable for manufacturing practical magnet wires according to testing method JIS-C-3211 are between TMP/TDI/PEE(#1000)=1/1/0.7-0.9 and the properties of the corresponding crosslinked films of practical magnet wires are generally of follow: strength at break at 70-120 kg/c□ and elongation at 70-130%. |
本系統中英文摘要資訊取自各篇刊載內容。