✦ LIBER ✦

Structural and thermal behavior of PC/PBT blends

✍ Scribed by S. P. Mishra; P. Venkidusamy

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 422 KB
Volume: 58
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1995.070581211

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✦ Synopsis

Blends of polycarbonate (PC) with poly(buty1ene terphthalate) (PBT) were characterized using density measurements, DSC, IR, and TGA. Addition of PBT increases the density values of blends linearly. All the blends show a single glass transition temperature, indicating the miscibility of the two polymers in the amorphous phase. With more than 6% addition of PBT to PC, PBT crystallizes as per its own crystal structure. The addition of 4% PBT to PC improves the thermal stability at higher temperature than does pure PC. IR studies shows that addition of PBT improves the intermolecular forces in PC, in particular, on the endgroup and the C-CH3 and C = O groups as indicated in the frequencies 1020, 1370, and 1770-1790 cm-'.

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