Structural changes in glassy polymers
It has previously been shown that glassy poly(ethylene terephthalate) gives rise to endothermal peaks in DTA when annealed at temperatures near to the glass temperature. The present work describes results obtained from DTA and DSC on annealing a number of glassy polymers which have been rapidly cool...
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| Veröffentlicht in: | Journal of applied polymer science 1970-10, Vol.14 (10), p.2619-2628 |
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| container_end_page | 2628 |
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| container_title | Journal of applied polymer science |
| container_volume | 14 |
| creator | Ali, M. S. Sheldon, R. P. |
| description | It has previously been shown that glassy poly(ethylene terephthalate) gives rise to endothermal peaks in DTA when annealed at temperatures near to the glass temperature. The present work describes results obtained from DTA and DSC on annealing a number of glassy polymers which have been rapidly cooled from above the glass temperature and on slowly cooled samples of the same polymers. The polymers which have been studied are: poly(ethylene terephthalate), poly(methyl methacrylate), atactic and isotactic polystyrene, bisphenol‐A polycarbonate, poly(ethyl methacrylate) and poly(vinyl acetate). In every case, evidence of structural reorganization is observed, and the rate at which this takes place is reported. Separate studies on poly(ethylene terephthalate) reflect density changes which also take place upon annealing. These results are discussed in the context of the calorimetric observations. |
| doi_str_mv | 10.1002/app.1970.070141017 |
| format | Article |
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S.</creatorcontrib><creatorcontrib>Sheldon, R. P.</creatorcontrib><title>Structural changes in glassy polymers</title><title>Journal of applied polymer science</title><addtitle>J. Appl. Polym. Sci</addtitle><description>It has previously been shown that glassy poly(ethylene terephthalate) gives rise to endothermal peaks in DTA when annealed at temperatures near to the glass temperature. The present work describes results obtained from DTA and DSC on annealing a number of glassy polymers which have been rapidly cooled from above the glass temperature and on slowly cooled samples of the same polymers. The polymers which have been studied are: poly(ethylene terephthalate), poly(methyl methacrylate), atactic and isotactic polystyrene, bisphenol‐A polycarbonate, poly(ethyl methacrylate) and poly(vinyl acetate). In every case, evidence of structural reorganization is observed, and the rate at which this takes place is reported. 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P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structural changes in glassy polymers</atitle><jtitle>Journal of applied polymer science</jtitle><addtitle>J. Appl. Polym. Sci</addtitle><date>1970-10</date><risdate>1970</risdate><volume>14</volume><issue>10</issue><spage>2619</spage><epage>2628</epage><pages>2619-2628</pages><issn>0021-8995</issn><eissn>1097-4628</eissn><abstract>It has previously been shown that glassy poly(ethylene terephthalate) gives rise to endothermal peaks in DTA when annealed at temperatures near to the glass temperature. The present work describes results obtained from DTA and DSC on annealing a number of glassy polymers which have been rapidly cooled from above the glass temperature and on slowly cooled samples of the same polymers. 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| fulltext | fulltext |
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| ispartof | Journal of applied polymer science, 1970-10, Vol.14 (10), p.2619-2628 |
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| source | Wiley Online Library Journals |
| title | Structural changes in glassy polymers |
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