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Concentration dependence of network structures in poly[styrene‐ alt ‐(octadecylmaleimide)] thermoreversible gels
Author(s) -
Wang Xiaorong
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(20000301)201:6<642::aid-macp642>3.0.co;2-9
Subject(s) - lamellar structure , dodecane , styrene , polymer chemistry , polymer , layer (electronics) , network structure , chemistry , materials science , crystallography , chemical engineering , copolymer , composite material , organic chemistry , machine learning , computer science , engineering
The concentration dependence of the gelation process of poly[styrene‐ alt ‐(octadecylmaleimide)] in dodecane was investigated. It was found that for this process there were three distinct regions of the polymer volume concentration ( V p ) bounded by two characteristic quantities V p.g and V * p.g . The gel started to form at V p = V p.g , while no gel could be detected when V p < V p.g . The entire solution became gelatinized as a lamellar layer network once V p > V * p.g . In the intermediate concentration region, V p.g < V p < V * p.g , the system was undergoing a transition from a chain network to a lamellar layer network. For the polymer solutions, the quantity V p.g marks the birth of a gel and the quantity V * p.g marks the formation of a layer network in the system. In the layer network region, the modulus of the network relates to the long period and the concentration of the network through cubic laws.