Annealing of deformed polymers under dimensional constraint

Autor:	J. C. M. Li, Teh‐Ming Kung
Rok vydání:	1986
Předmět:	chemistry.chemical_classification Chemistry Annealing (metallurgy) Stored energy Polymer chemistry General Physics and Astronomy Thermomechanical analysis Mechanics Polymer Polyvinyls Synthetic materials Amorphous solid
Zdroj:	Journal of Applied Physics. 60:2659-2664
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.337092
Popis:	The two‐stage process discovered in the recovery of deformed amorphous polymers (PS, PMMA, and PC) is verified in this study. The first stage which takes place below Tg releases part of the stored energy (part 1) and recovers the volume. The second stage which takes place above Tg releases the rest of the stored energy (part 2) and recovers the dimension. The relation between the part 2 stored energy and dimensional changes during deformation is the same as that during recovery. In this study, the dimension is constrained not to change during recovery. As expected, the part 2 stored energy is not released but the part 1 stored energy is released as usual. Furthermore, if in a second scan the constraint is removed and the dimension is allowed to recover, the part 2 stored energy is then released. These results confirm the unique relationship between dimension and the part 2 stored energy and the separability of the two‐stage recovery process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b6c7905494547c4d78255bc912c3cc34 https://doi.org/10.1063/1.337092 Zobrazit plný text záznamu