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Influence of gas sorption on the surface tension of liquid crystalline substances. A relaxation test on a liquid‐crystalline side‐chain polyacrylate
Author(s) -
Chen GongHao,
Springer Jürgen
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19981201)19:12<625::aid-marc625>3.0.co;2-a
Subject(s) - side chain , surface tension , drop (telecommunication) , sorption , polymer , materials science , chemical engineering , relaxation (psychology) , maximum bubble pressure method , polymer chemistry , drop test , sessile drop technique , liquid crystalline , thermodynamics , chemical physics , chemistry , organic chemistry , composite material , adsorption , physics , engineering , psychology , telecommunications , social psychology , computer science , aerospace engineering
Computer‐aided pendant drop profile analysis is used to investigate the relaxation of gas sorption at the surface of the liquid‐crystalline side‐chain polyacrylate PAC‐6 after transient surface area changes – square‐pulse disturbance. This test demonstrates, for the first time, the possibility of qualitative estimation of the surface molecular order. The results confirm the existence of a pretransitional order and indicate the enrichment of the liquid‐crystalline side chains at the polymer surface. The influence of drop size on the accuracy of the surface tension determination by using the pendant drop method is also discussed.