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| Title: | Thermal behaviour of acrylonitrile copolymers having methacrylic and itaconic acid comonomers |
| Authors: | Bajaj, P
Sreekumar, T V
Sen, K |
| Keywords: | PAN
Acrylonitrile vinyl acid copolymers
High-pressure DSC |
| Issue Date: | 2001 |
| Citation: | Polymer, 42(4), 1707–1718 |
| Abstract: | The effect of comonomers, methacrylic (MAA 3–6 mol%) and itaconic acid (IA 2–3 mol%) on the glass transition temperature, Tg,
hydration melting and thermo-oxidative stabilization of acrylonitrile copolymers has been studied by differential scanning calorimetry (DSC). While, two Tg‘s were observed, near 70 and 1408C, for PAN homopolymer, copolymers showed another baseline shift below 708C. The melting point, Tm, of PAN and copolymer, P(AN/IA) containing 3.2 mol% of IA, has been reduced to 186 and 1588C, respectively, in high-pressure DSC. The copolymers showed two distinct melting peaks in the first heating cycle, but the melt on subsequent cooling
exhibited a single exotherm due to crystallization. The melting point of IA copolymer (1588C) was found to be lower than that of MAA copolymer (1648C) and PAN homopolymer (1868C). Tm further decreases with increase in the comonomer content. In the second heating cycle, observed Tm is higher than that noted in the first heating run, indicati... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/894 |
| Appears in Collections: | Textile Technology
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