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Some linear and branched macromolecules by ring‐opening polymerization
Author(s) -
Schulz Rolf C.
Publication year - 1993
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.19930730111
Subject(s) - chloroformate , copolymer , polymer chemistry , polymerization , monomer , chemistry , polymer , oxazoline , methacrylate , living polymerization , materials science , organic chemistry , radical polymerization , catalysis
In the first part the ring‐opening polymerization of some macrocyclic ether‐acetals is briefly described. Of special interest are acetal polymers with functional groups, for instance C=C‐double bonds. Appropriate unsaturated monomers and their polymerizability are discussed. The second part deals with the polymerization of oxazolines, substituted in 2‐ and/or 4‐position. Branched polymers are obtained by copolymerization of 2‐ethyl‐2‐oxazoline with 2‐hexyl‐2‐oxazoline or 2‐undecyl‐2‐oxazoline. The properties of the random copolymers and corresponding block copolymers are compared. By a “mixed mechanism technique” a block copolymer composed of a poly(tert ‐butyl methacrylate) block and a poly(phenyloxazoline) block was prepared. A new initiator system for the polymerization of oxazolines using alkyl chloroformates is introduced. The chloroformate of a trifunctional alcohol led to a three‐arm star polymer. Telechelics with two chloroformate endgroups form ABA type block copolymers. Finally four chiral oxazolines are described and the influence of substitution in dioxolanes and oxazolines on the polymerizability is discussed.