Liebigs Annalen p. 2281 - 2288 (1997)
Update date:2022-08-16
Topics:
Lub, Johan
Broer, Dirk Jan
Van Den Brock, Nel
Liquid-crystalline monomers containing two vinyl groups, two mercapto groups, or a 1:1 combination of the two have been synthesized and characterized in terms of their mesomorphic properties. These monomers can be photopolymerized in situ in an appropriate ratio of vinyl and mercapto groups to form highly ordered liquid-crystalline main-chain polymers. During polymerization in the nematic phase the appearance changes from clear in the highly aligned bire-fringent state to opaque. This effect is probably due to scattering which is caused by the disturbance of the macro alignment as a result of the polymerization shrinkage and/or phase separation. In some cases, the reaction mixtures pass from the nematic to the crystalline state which results in a reduction in the degree of conversion and also in a change in the microcrystalline state. Crystallization can be suppressed by promoting asymmetry of the molecular structure which leads to a higher degree of conversion. Wiley-VCH Verlag GmbH, 1997.
View Morehangzhou verychem science and technology co.ltd
website:http://www.verypharm.com
Contact:+86-571-88162785; 88162786
Address:F1502, 753 Shenhua road, Hangzhou, China
Anqing World Chemical Co., Ltd.
Contact:+86-556-5800026
Address:Daguan Economic Development Zone of circular economy industrial park Anqing City Anhui province
Chengdu ZY Biochemical Technology Co., LTD
Contact:0086-28-88680086
Address:170 Qingpu Road, Shouan Town, Pujiang County
Contact:+86-571-28186845
Address:Room 1224,Eastcom Mansion,398 Wensan Road,Hangzhou,310013 China
Taizhou volsen chemical Co., Ltd
website:http://www.volsenchem.com
Contact:+86-576-88869393
Address:Jiaojiang District, Taizhou, Zhejiang, China.
Doi:10.1016/S1872-2067(19)63476-5
(2020)Doi:10.1021/ol0158314
(2001)Doi:10.1002/ardp.19843171106
(1984)Doi:10.1002/adsc.201900187
(2019)Doi:10.1055/s-2002-31915
(2002)Doi:10.1039/c39850001700
(1985)