Premium
Ionomer‐like materials based on 4‐vinylpyridine copolymers
Author(s) -
Jacovic M. S.,
Favier J. C.,
Janah H.
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890250121
Subject(s) - copolymer , polybutadiene , comonomer , materials science , polymer chemistry , ionomer , dispersity , vulcanization , phase (matter) , methacrylate , rheology , polymer science , natural rubber , composite material , chemistry , polymer , organic chemistry
The purpose of this study is to examine the synthesis and to compare the rheological behaviour of ionomer‐like materials obtained by complexation of 4VP residues in statistical and block copolymers with ZnCl 2 . For statistical copolymers n‐butyl methacrylate was chosen as comonomer, while triblock copolymers involved butadiene (as central sequence). In spite of a different distribution of the 4VP residues along the chains, the complexed copolymers exhibited generally a rheological behaviour typical of that of ionomers. However, owing to this distribution and the poly‐dispersity, the morphology is quite different. The properties of statistical copolymers resulted from the formation of a mixture of multiplets and clusters. For the block copolymer, the Tg of the rubbery phase is close to that of polybutadiene (−84°C), but no relaxation is observed below 230°C and a two‐phase model is adequate in this case. The very large increase of the rubbery plateau is typical of that of a vulcanized rubber.