Hydrophilicity, crystallinity and electrostatic dissipating properties of poly(oxyethylene)‐segmented polyurethanes
作者： Jiang-Jen Lin , Yong-Chian Chen
DOI: 10.1002/(SICI)1097-0126(199901)48:1<57::AID-PI112>3.0.CO;2-7
关键词:
摘要: Plaques of poly(oxyethylene)-segmented polyurethanes prepared from isophorone diisocyanate (IPDI) and polyethylene glycol (PEG) were used to probe the structure/property relationships with regard hydrophilicity, crystallinity electrostatic dissipating (ESD) ability. The urethane polymers or oligomers consistently exhibited lower surface resistivities than their corresponding PEG-1000, 2000 8000 starting materials. magnitude decrease in resistivity (ohm/sq) was correlated heat crystallinity, measured by differential scanning calorimetry. Surface as low 107.5 ohm/sq for PEG-1000/IPDI polyurethane, a 2.5 orders pure observed attributed differences crystallinity. Polyurethanes containing PEG, polypropylene (PPG) mixed PEG/PPG also comparison. PEG/MDEA (N -methyl diethanolamine) further demonstrated importance nature mobility hydrophilic groups lowering polymer resistivity. To account these observations, an electron conducting mechanism via association hydrogen-bonded water molecules poly(oxyethylene) is suggested. © 1999 Society Chemical Industry
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