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http://dx.doi.org/10.7317/pk.2012.36.4.513

Characterization of Poly(ether-block-amide)s Prepared from Oligomeric Polyamide 12 via Dispersion Polymerization  

Kim, Doo-Hyeon (Major in Polymer Engineering, Dept. of Adv. Material Eng., Kongju National University)
Lee, Ji-Hun (Major in Polymer Engineering, Dept. of Adv. Material Eng., Kongju National University)
Kim, Hyung-Joong (Major in Polymer Engineering, Dept. of Adv. Material Eng., Kongju National University)
Publication Information
Polymer(Korea) / v.36, no.4, 2012 , pp. 513-518 More about this Journal
Abstract
Polyamide 12 (PA12) oligomers (oPA1) were prepared by dispersion polymerization of ${\omega}$-amino carboxylic acid and dibasic acid in a dispersion medium, thermally stable hydrocarbon liquid paraffin, YK-D130 (a step polymerization). The molecular weight and various properties of other oligomeric PAs (oPA2) obtained by bulk polymerization without the medium were compared with those of oPA1s. The oPA1s showed lighter white color and narrower molecular weight distribution than oPA2s at the same molecular weight. Moreover elastomeric poly(ether-block-amide) (PEBA)s were synthesized with oPA1 and oPA2 as hard segments and poly(tetramethylene glycol) (PTMG) as a soft segment. The molecular weight distribution, and mechanical property of the PEBA originated from the both oligomeric PAs were characterized.
Keywords
oligomer; polyamide 12; dispersion medium; ${\omega}$-amino carboxylic acid; PEBA;
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