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Polypropylene glycols (PPG)˼
propylene oxide (PO)ÀÇ anionic polymerization¿¡ ÀÇÇؼ
¸¸µé¾î Áö¸ç PEG´Â
ethylene oxides
(EO)¿¡ ÀÇÇؼ ¸¸µé¾îÁø´Ù.
Polytetramethylene ether glycols (PTMEG)´Â
tetrahydrofuran (THF)ÀÇ cationic Ppolymerization¿¡
ÀÇÇؼ ¸¸µé¾î Áø´Ù.
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Æú¸®¿ÃÀº diacid¿Í excess diolÀÇ ÃàÇÕ¹ÝÀÀ¿¡ ÀÇÇؼ
¸¸µé¾î Áö¸ç, Ãʱ⿡ diol,
triolµîÀ» ³Ö°í 60-90°CÁ¤µµ °¡¿ÈÄ
dicarboxilic acid¸¦ ÅõÀÔÇÏ¿© »ý¼º¼ö¸¦ Á¦°ÅÇϸç
¹ÝÀÀÀ» ÁøÇàÇÑ´Ù. ¸ñÇ¥µÈ ºÐÀÚ·®À» ¸ÂÃß±â
À§Çؼ´Â ¹Ì¸® °è»êÇÏ¿© ÅõÀÔµÈ excess
diol°ú ¹°À» Àû´çÇÑ ¿Âµµ¿¡¼ ÀúÁø°ø ¹× °íÁø°øÀ¸·Î Á¦°ÅÇÑ ÈÄ ºÐÀÚ·®À»
¸ÂÃß¾î Á¦Ç°À» ¸¸µç´Ù.
Polyester polyol
(MW = 2000)ÀÇ
¼ººÐ¿¡ µû¸¥ ¹°¼ºÄ¡ ºñ±³
Structure |
Solidification
point (°C) |
Viscosity at 75°C
(mPa.s) |
adipic acid +
ethylene
glycol |
52 |
540 |
adipic acid +
ethylene
glycol + 1,4-butane diol |
17 |
625 |
adipic acid +
1,4-butane diol |
56 |
670 |
adipic acid +
hexamethylene glycol + neopentyl glycol |
27 |
640 | |
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