Hadjou Belaid, ZMechernene, LMaschke, U2013-05-162013-05-1620111542-1406https://dspace.univ-tlemcen.dz/handle/112/1906Molecular Crystals and Liquid Crystals ISSN : 1542-1406, DOI : 10.1080/15421406.2011.569290, Issue : 4, Volume : 9, pp. 157-164, 2011.The transmission versus time curves of in-situ UV-cured Tripropyleneglycoldiacrylate (TPGDA)/E7 films reveal three regions: A first domain corresponding to a transparent film of the initial TPGDA/E7 mixture before exposure to UV light. In the second time domain, the sample exhibits a fast relaxation process just after the beginning of the UV irradiation of the monomer/LC blend. A surprising third domain, characterised by an enhancement of the film transparency, is observed at longer relaxation times. This process, covering a period of time going from several milliseconds to minutes, depends on the conditions of sample preparation and film thickness.enLiquid crystalmonomerphase separation kineticsrelaxation timesultraviolet irradiationArticle