caa a22 4500 378903616 CHVBK 20180305123524.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.654 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.654 AB Block-copolymers poly(oxyethylene)-blockpoly( dicyclohexyl itaconate): temperature dependence of the morphology [Elektronische Daten] [Krasimira Aleksieva, Ane Ancev, Slobodanka Koseva, Maja Cvetkovska, Emanuel Nedkov] The paper deals with AB block-copolymers poly(oxyethylene)-blockpoly( dicyclohexyl itaconate) (POE/PDCHI) containing 2000 and 5000 g/mol of the flexible POE. The study aims at revealing the thermal effect on the copolymer morphology in the 20 - 200°C range. Optical microscopy investigations were performed. The results confirm our previous X-ray studies. A liquid crystalline state is observed in the 90 - 180°C range. It is characterized by birefringence and is determined by the chair-chair conformation, a dominating structure of the cyclohexyl rings. A condis-crystal state is observed at cooling in the interval 90°C to room temperature. It is characterised by a variety of cyclohexyl conformations and, therefore, by a lack of birefringence. The PEO component in the copolymer starts crystallising into small local spherulites at about room temperature. The results obtained allow the conclusion that the presence of PDCHI is a determining factor for the mesomorphic state of the copolymers discussed. © 2013 by Walter de Gruyter GmbH & Co. Aleksieva Krasimira Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria; Fax +359 (2) 70-75-23 aut Ancev Ane Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut Koseva Slobodanka Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut Cvetkovska Maja Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut Nedkov Emanuel Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria; Fax +359 (2) 70-75-23 aut e-Polymers De Gruyter 4/1(2004-12-01), 654-672 2197-4586 4:1<654 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.654 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.654 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aleksieva Krasimira Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria; Fax +359 (2) 70-75-23 aut NATIONALLICENCE 700 1- Ancev Ane Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut NATIONALLICENCE 700 1- Koseva Slobodanka Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut NATIONALLICENCE 700 1- Cvetkovska Maja Cyril and Metodius University of Skopje, Faculty of Technology and Metallurgy, Rudjer Boskovic 16, 91000 Skopje, Republic of Makedonia; Fax +389-91-226-865 aut NATIONALLICENCE 700 1- Nedkov Emanuel Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria; Fax +359 (2) 70-75-23 aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 654-672 2197-4586 4:1<654 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter