Crystallization-induced Sequential Reordering in Poly(trimethylene terephthalate)/Polycarbonate Blends

Woo Jin Bae; Won Ho Jo; Yeun Hum Park

Macromolecular Research, Vol.10, No.3, 145-149, June, 2002

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Crystallization-induced Sequential Reordering in Poly(trimethylene terephthalate)/Polycarbonate Blends

Woo Jin Bae, Won Ho Jo^†, and Yeun Hum Park¹

Hyperstructured Organic Materials Research Center and School of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea
¹Department of Textile Engineering, College of Engineering, Sungkyunkwan University, Suwon 440-746, Korea

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Transesterification between poly(trimethylene terephthalate) (PTT) and bisphenol-A-polycarbonate (PC) is studied by differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR) spectroscopy. When the blend of PTT/PC is annealed at higher temperatures, the samples do not show any melting peak at an initial stage, indicating the samples completely lose their crystallinity due to the formation of random copolymers. However, when the random copolymer is annealed at temperatures lower than the melting temperature of PTT, a melting peak is observed, indicating that the random copolymers are sequentially reordered. The melting point and the heat of fusion of crystals formed from the crystallization-induced sequential reordering depend upon the annealing temperature and time. The average sequence length determined from NMR is increased as the blocks are regenerated.

Keywords:poly(trimethylene terephthalate);polycarbonate;crystallization-induced sequential reordering

[References]

Wang LH, Huang Z, Hong T, Porter RS, J. Macromol. Sci.-Phys., B29, 155 (1990)
Su KF, Wei KH, J. Appl. Polym. Sci., 56(1), 79 (1995)
Kollodge JS, Porter RS, Macromolecules, 28(12), 4097 (1995)
Kollodge JS, Porter RS, Macromolecules, 28(12), 4106 (1995)
Porter RS, Jonza JM, Kimura M, Desper CR, George ER, Polym. Eng. Sci., 29, 55 (1989)
Porter RS, Wang LH, Polymer, 33, 2019 (1992)
Lenz R, Jin JI, Feichtinger KA, Polymer, 24, 327 (1983)
Fakirov S, Sarkissova M, Denchev Z, Macromol. Chem. Phys., 197, 2837 (1996)
Ward IM, Wilding MA, Brody H, J. Polym. Sci. B: Polym. Phys., 14, 263 (1976)
Devaux J, Godard R, Mercier P, J. Polym. Sci. B: Polym. Phys., 20, 1875 (1982)

[Referenced By]

[Related Articles]

[1] Wang LH, Huang Z, Hong T, Porter RS, J. Macromol. Sci.-Phys., B29, 155 (1990)

[2] Su KF, Wei KH, J. Appl. Polym. Sci., 56(1), 79 (1995)

[3] Kollodge JS, Porter RS, Macromolecules, 28(12), 4097 (1995)

[4] Kollodge JS, Porter RS, Macromolecules, 28(12), 4106 (1995)

[5] Porter RS, Jonza JM, Kimura M, Desper CR, George ER, Polym. Eng. Sci., 29, 55 (1989)

[6] Porter RS, Wang LH, Polymer, 33, 2019 (1992)

[7] Lenz R, Jin JI, Feichtinger KA, Polymer, 24, 327 (1983)

[8] Fakirov S, Sarkissova M, Denchev Z, Macromol. Chem. Phys., 197, 2837 (1996)

[9] Ward IM, Wilding MA, Brody H, J. Polym. Sci. B: Polym. Phys., 14, 263 (1976)

[10] Devaux J, Godard R, Mercier P, J. Polym. Sci. B: Polym. Phys., 20, 1875 (1982)