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Preparation of the Blends of Poly(amic acid) and PBO Precursor and Their Properties  

Yoon, Doo-Soo (Department of Polymer Science & Engineering, Chosun University)
Choi, Jae-Kon (Department of Polymer Science & Engineering, Chosun University)
Jo, Byung-Wook (Department of Chemical Engineering, Chosun University)
Publication Information
Polymer(Korea) / v.32, no.1, 2008 , pp. 77-84 More about this Journal
Abstract
The thermal properties, morphology, mechanical properties and gas permeability of the blends of poly (amic acid) (PAA) and poly (o-hydroxyamides) (PHAs) having pendant group was investigated. The 5% weight loss and major weight loss of the b)ends occurred in the ranges of $348{\sim}407^{\circ}C$ and $589{\sim}615^{\circ}C$ upon a heating process. After a thermical annealing, the tensile strength and initial modulus of blends increased $3.7{\sim}52.9%$ and $34.4{\sim}70%$ from the value of pure PAA, respectively. Especially the tensile strength and modulus of the PAA/MP-PHA=9/1 showed the highest values (97.5 MPa and 2.67 GPa, respectively), which were 53 and 70% higher than those of pure PAA. The fine PHA domains were found to be uniformly dispersed. The interfacial adhesion between PAA and PHA was identified to be good. The gas permeabilities of PAA/M-PHA blend increased with M-PHA contents.
Keywords
poly(amic acid); Poly(o-hydroxyamide)s; thermal cyclization reaction; blend;
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Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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