Evaluation relaxed volume of .sub.a-./sub.PMMA and .sub.a-./sub.PMMA/CB from heating

0429170 - ÚH 2015 RIV CZ eng J - Journal Article
Hadač, J. - Slobodian, P. - Sáha, P. - Říha, Pavel
Evaluation relaxed volume of _a-PMMA and _a-PMMA/CB from heating.
Chemické listy. Roč. 108, special issue 1 (2014), s. 50-58. ISSN 0009-2770. E-ISSN 1213-7103
Grant - others:GA MŠk(CZ) EE.2.3.20.0104; GA MŠk(CZ) ED2.1.00/03.0111
Institutional research plan: CEZ:AV0Z20600510
Institutional support: RVO:67985874
Keywords : isobaric heating * physical aging * PMMA * volume relaxation * polymer/carbon black composite
OECD category: Nano-processes (applications on nano-scale)
Impact factor: 0.272, year: 2014
http://www.chemicke-listy.cz/docs/full/2014_s1_s50-s58.pdf

Volume relaxation of _a-PMMA and _a-PMMA/carbon black composites during heating has been analyzed from the heating scans. It concerns two ways of physical aging initiation, temperature down-jump and cooling. Samples were heated and v(T) dependency measured after annealing at various aging times bellow T_g Relaxed volume was evaluated from peaks of (T) dependencies, derivated from v(T) curves. Good agreement between isothermal relaxation measurements and relaxed volume from heating has been found out. Presence of filler particles in composite lead to reduction of relaxation response and rate of relaxation changes in PMMA.
Permanent Link: http://hdl.handle.net/11104/0234344