. "Enthalpy Relaxation of PS and PMMA with different molecular weight paramethers" . "46" . . "Enthalpy relaxation of PS and PMMA were measured after temperature down-jumps from the equilibrium state of the material above Tg to temperatures close below Tg. All temperature history of the samples and also final temperature up-scan of relaxed samples were performed on DSC 1 Pyris from Perkin-Elmer. Polymer samples with different molecular weight parameters, such as molecular weight and molecular weight distribution were prepared by precipitation of the corresponding material. Enthalpy relaxation isotherms were fitted by Tool-Narayanaswamy-Moynihan (TNM) model. The influence of molecular weight on relaxation response is discussed through TNM parameters, such as apparent activation energy for structural relaxation, non-linearity parameter and stretching exponent. Further discussion is carried out in terms of enthalpy relaxation rate calculated from relaxation isotherms in the region where relaxation data varies linearly with logarithm of relaxation time."@en . "Slobodi\u00E1n, Petr" . . . "Enthalpy Relaxation of PS and PMMA with different molecular weight paramethers"@en . "ICTAC 13" . "562929" . "S\u00E1ha, Petr" . . . "enthaply relaxation"@en . "28110" . "RIV/70883521:28110/04:63502707!RIV/2005/MSM/281105/N" . . "Enthalpy relaxation of PS and PMMA were measured after temperature down-jumps from the equilibrium state of the material above Tg to temperatures close below Tg. All temperature history of the samples and also final temperature up-scan of relaxed samples were performed on DSC 1 Pyris from Perkin-Elmer. Polymer samples with different molecular weight parameters, such as molecular weight and molecular weight distribution were prepared by precipitation of the corresponding material. Enthalpy relaxation isotherms were fitted by Tool-Narayanaswamy-Moynihan (TNM) model. The influence of molecular weight on relaxation response is discussed through TNM parameters, such as apparent activation energy for structural relaxation, non-linearity parameter and stretching exponent. Further discussion is carried out in terms of enthalpy relaxation rate calculated from relaxation isotherms in the region where relaxation data varies linearly with logarithm of relaxation time." . . "Baia Chia" . "Entalpick\u00E1 relaxace PS a PMMA s rozd\u00EDln\u00FDmi molekul\u00E1rn\u00EDmi parametry"@cs . "Enthalpy Relaxation of PS and PMMA with different molecular weight paramethers" . . "2004-11-12+01:00"^^ . "[D7CA88D202A8]" . "Baia Chia,It\u00E1lie" . . "Enthalpy Relaxation of PS and PMMA with different molecular weight paramethers"@en . . . "2"^^ . . "RIV/70883521:28110/04:63502707" . "Associazione Italiana di Calorimetria e Analisi Termica" . "2"^^ . . "Entalpick\u00E1 relaxace PS a PMMA s rozd\u00EDln\u00FDmi molekul\u00E1rn\u00EDmi parametry"@cs . . "V t\u00E9to pr\u00E1ci byla m\u011B\u0159ena entalpick\u00E1 relaxace PS a PMMA po teplotn\u00EDm skoku sm\u011Brem dolu z teploty nad Tg pod Tg. Kompletn\u00ED teplotn\u00ED historie byla prov\u00E1d\u011Bna na DSC 1 Pyris od firmy Perkin-Elmer. Sledovan\u00FDm parametrem byla r\u016Fzn\u00E1 molekulov\u00E1 hmotnost a taky molekulov\u00E1 distribuce. Jednotliv\u00E9 frakce byly p\u0159ipraveny sr\u00E1\u017Een\u00EDm p\u0159\u00EDslu\u0161n\u00FDch materi\u00E1l\u016F. Pro fitov\u00E1n\u00ED relaxa\u010Dn\u00EDch k\u0159ivek byl pou\u017Eit Tool-Narayanaswamy-Moynihan\u016Fv model, vliv molekukulov\u00E9 v\u00E1hy na relaxaci je tedy diskutov\u00E1n pomoc\u00ED parametr\u016F t\u00E9to rovnice. Vliv molekulov\u00E9 v\u00E1hy byl zji\u0161\u0165ov\u00E1n rovn\u011B\u017E pomoc\u00ED entalpick\u00E9 relaxa\u010Dn\u00ED rychlosti, po\u010D\u00EDtan\u00E9 z relaxa\u010Dn\u00EDch izoterm z oblasti, kde se relaxa\u010Dn\u00ED data line\u00E1rn\u011B m\u011Bn\u00ED s logaritmem relaxa\u010Dn\u00EDho \u010Dasu."@cs . "Z(MSM 265200015)" . "1"^^ .