caa a22 4500 465787851 CHVBK 20180323112014.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00983968 doi (NATIONALLICENCE)springer-10.1007/BF00983968 Physical ageing in glassy liquid crystalline poly(p-hydroxy-benzoic acid-co-ethylene terephtalate) [Elektronische Daten] [Per Hedmark, Ralph Dick, Ulf Gedde] Summary: Glassy liquid crystalline poly(p-hydroxy-benzoic acid-co-ethylene terephthalate) is after rapid cooling from temperatures above Tg in a non-equilibrium state and exhibits physical ageing. It is shown that enthalpy and volume decrease with increasing annealing time. At the same undercooling, with respect to middle temperature of the major glass transition (Tgl), the rate of the equilibration process is significantly slower in the studied polymer than in an ordinary glassy amorphous polymer. The presence of a constraining ETP-rich phase exhibiting a 25 K higher glass temperature than Tgl may be the cause for this retarded enthalpy relaxation. Springer-Verlag, 1990 Hedmark Per Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut Dick Ralph Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut Gedde Ulf Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 83-88 0170-0839 23:1<83 1990 23 289 https://doi.org/10.1007/BF00983968 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00983968 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hedmark Per Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Dick Ralph Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Gedde Ulf Department of Polymer Technology, Royal Institute of Technology, S-100 44, Stockholm, Sweden aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 83-88 0170-0839 23:1<83 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer