Počet záznamů: 1
Synthesis and thermal behavior of telechelic poly(butadiene)diols with azobenzene-based liquid-crystalline units in side chains
- 1.
SYSNO ASEP 0339561 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Synthesis and thermal behavior of telechelic poly(butadiene)diols with azobenzene-based liquid-crystalline units in side chains Tvůrce(i) Poláková, Lenka (UMCH-V) RID
Sedláková, Zdeňka (UMCH-V) RID, ORCID
Látalová, Petra (UMCH-V)Zdroj.dok. Polymer Bulletin. - : Springer - ISSN 0170-0839
Roč. 64, č. 4 (2010), s. 315-326Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova azobenzene mesogens ; radical addition ; poly(butadiene)diols Vědní obor RIV CD - Makromolekulární chemie CEP GA202/09/2078 GA ČR - Grantová agentura ČR CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000274099400001 DOI 10.1007/s00289-009-0142-z Anotace Mesogenic thiols with azobenzene as a rigid part and with various substituent (H-, methoxy-, butoxy- or octyloxy-) in para-position of azobenzene ring were synthesized by multi-step syntheses. The thiols were grafted onto double bonds of telechelic poly(butadiene)diol (M (n) similar to 2,400, functionality f (n) = 2, 60 mol.% of 1,2-butadiene units) via radical addition in the presence of 2,2'-azobis(2-methylpropionitrile) (AIBN). Initial mole ratio of thiol/double bonds varied in the range of 0.2-1.0. Influence of the azobenzene substituent on the extent of modification reaction was estimated using elemental analysis, size-exclusion chromatography and H-1 NMR spectroscopy. The substituent on mesogen plays also an important role in thermal behavior of both the thiols and the obtained comb-like polymers, as determined by differential scanning calorimetry and polarizing optical microscopy. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2010
Počet záznamů: 1