STUDIES ON CHITIN-BASED LIQUID CRYSTALLINE POLYMERS——THE LYOTROPIC LIQUID CRYSTALLINITY OF LOW MOLECULAR WEIGHT CHITOSAN AND THE INFLUENCE OF MOLECULAR MASS ON CRITICAL CONCENTRATION
DONG Yanming, HUANG Xunting, ZHAO Yaqing, YANG Liulin, MAO Wei, BI Danxia, ZHAO Lianjun. STUDIES ON CHITIN-BASED LIQUID CRYSTALLINE POLYMERS——THE LYOTROPIC LIQUID CRYSTALLINITY OF LOW MOLECULAR WEIGHT CHITOSAN AND THE INFLUENCE OF MOLECULAR MASS ON CRITICAL CONCENTRATION[J]. Acta Polymerica Sinica, 2006,(1):16-20.
DONG Yanming, HUANG Xunting, ZHAO Yaqing, YANG Liulin, MAO Wei, BI Danxia, ZHAO Lianjun. STUDIES ON CHITIN-BASED LIQUID CRYSTALLINE POLYMERS——THE LYOTROPIC LIQUID CRYSTALLINITY OF LOW MOLECULAR WEIGHT CHITOSAN AND THE INFLUENCE OF MOLECULAR MASS ON CRITICAL CONCENTRATION[J]. Acta Polymerica Sinica, 2006,(1):16-20.DOI:
The lyotropie liquid crystallinity of two low molecular weJisht chitosan samples prepared by enzymic decomposition was investigated.The number averge molecular masses of those two samples CSl and CS2 were 622 and 231 l g/m01.measured by means of GPC and MS.ne lyotropic liquid crystalline behavior was found for these samDles eyen when the molecular mass was as low as 622 g/mol(~tetramer).The critical concentration of CSl and CS2 to form liquid crystalline phase was determined to be 73 wt%and 36 wt%respectively.The results agree with the Drincipie rule deduced from chitosans with high and medium molecular mass
which states tllat山e critical concentration increases with the decrease of molecular mass.However the resuhs were not aceordant with those Dredietd by the traditional Khokhlov.Semenov(KS)theory
because山e molecular lnass of the samples is out of the region in which KS theory can be used.