Journal
COLLOID AND POLYMER SCIENCE
Volume 288, Issue 4, Pages 439-448Publisher
SPRINGER
DOI: 10.1007/s00396-009-2142-9
Keywords
Miscibility; Intermolecular interaction; Biodegradable polyester; Phase behavior
Categories
Funding
- Taiwan's National Science Council [NSC-95 2221 E006 183, NSC 96-2221-E-006-011]
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Miscibility with a linear T (g)-composition relationship was proven for blend of poly(butylene adipate-co-butylene terephthalate) [P(BA-co-BT)] with poly(4-vinyl phenol) (PVPh). In comparison to the blends of PBA/PVPh and poly(butylene terephthalate) (PBT)/PVPh, the Kwei's T (g) model fitting on data for the P(BA-co-BT)/PVPh blend yields a q value between those for the PBA/PVPh and PBT/PVPh blends. The q values suggest that the interaction strength in the P(BA-co-BT)/PVPh blend is not as strong as that in the PBT/PVPh blend. Upon mixing the PVPh into the immiscible blend of PBA and PBT, the ternary PBA/PBT/PVPh blends only exhibits partial miscibility. Full-scale ternary miscibility in whole compositions is not possible owing to the significant a dagger chi effect (chi (ij) -aEuro parts per thousand chi (ik) ). The wavenumber shifts of the hydroxyl IR absorbance band indicates that the H-bonding strength is in decreasing order-PBT/PVPh > P(BA-co-BT)/PVPh > PBA/PVPh-and shows that the BA segment in the copolymer tends to defray interactions between P(BA-co-BT) and PVPh in blends.
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