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Widayani Sutrisno
Department of Physics, Institut Teknologi Bandung Jl. Ganesa 10 Bandung 40132
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Thermal Analysis of the Soft Segment (SS) Glass Transition of Diacetylene-containing Polyurethanes (DA-coPUs) Widayani Sutrisno
Indonesian Journal of Physics Vol 16 No 2 (2005): Vol. 16 No. 2, April 2005
Publisher : Institut Teknologi Bandung

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Abstract

The glass transition of a two-phase polymer, Diacetylene Containing Polyurethanes (DA-coPUs) containing 50%-by-weight hard-segments made from polyol Voranol EP 2001, isocyanate methylene diphenylene diisocyanate (MDI), and chain extender 2,4-hexadiyne-1,6-diol (HDD) has been analysed using Differential Scanning Calorimetry (DSC), Temperature Modulated DSC (MDSC) and Dynamical Mechanic Thermal Analysis (DMTA) measurements. The temperature of the glass transition of the DA-coPUs is mainly influenced by the polyol, showing a Tg of –72°C. The presence of isocyanate and short diol resulted in increasing Tg by about 25 °C. Tg values observed from DMTA measurements were higher than that from DSC and TMDSC measurements by about 10 and 15 °C, respectively. After cross-polymerisation of the DA-coPUs, the temperature of the glass transition was increased by about 8-10°C, showing the effect of polydiacetylene formation in the DA-coPUs.
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