DYNAMOOPTICAL PROPERTIES OF POLY(NAPHTHOY LENE) DERIVATIVES OF 1,3,4-OXADIAZOLE IN SULFURIC-ACID

Authors
LAVRENKO PN STRELINA IA SCHULZ B
Citation
Pn. Lavrenko et al., DYNAMOOPTICAL PROPERTIES OF POLY(NAPHTHOY LENE) DERIVATIVES OF 1,3,4-OXADIAZOLE IN SULFURIC-ACID, Vysokomolekularnye soedinenia. Seria A, 38(12), 1996, pp. 2027-2032
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
Vysokomolekularnye soedinenia. Seria A → ACNP
ISSN journal
05075475
Volume
38
Issue
12
Year of publication
1996
Pages
2027 - 2032
Database
ISI
SICI code
0507-5475(1996)38:12<2027:DPOPLD>2.0.ZU;2-7
Abstract
The flow birefringence properties of the solutions of poly(1,4-naphtho ylene-1,3,4-oxadiazole) and poly(3,3'-naphthoylene-1,3,4-oxadiazole) i n sulfuric acid were investigated. The value of the optical shear coef ficient of both polymers is approximately two times that known for pol y(n-phenylene-1,3,4-oxadiazole) in the same solvent. A comparative ana lysis of the hydrodynamic and dynamooptical characteristics of the sam ples and the data for other polymers with similar structures showed th at the poly(naphthoylene) derivatives studied belong to the class of r igid-chain polymers. A contribution of the naphthalene fragments of th e backbone to the optical anisotropy of the macromolecular chain segme nt was determined.