Estimation of conformational characteristics of bisphenol-A based poly(hydroxyethers)
- Citation data:
Polymer, ISSN: 0032-3861, Vol: 41, Issue: 8, Page: 2865-2870
- Publication Year:
- Repository URL:
- http://publikace.k.utb.cz/handle/10563/1002030; http://hdl.handle.net/10563/1002030
- Chemistry; Materials Science; bisphenol-A based epoxy resins; intrinsic viscosity; worm-like touched-bead chain model
Two samples of bisphenol-A based epoxy resins (poly(hydroxy ethers)) were fractionated by precipitation. The fractions were characterized by the weight-average molecular weight (1.3< M w ×10 −3 <40) and the intrinsic viscosity in tetrahydrofuran and chloroform. Theories based on the worm-like touched-bead model were used to treat the molecular-weight dependence of the intrinsic viscosity and to estimate the conformational characteristics (Kuhn statistical segment length l K, Flory characteristic ratio C ∞, and steric factor σ ). Low values of these characteristics indicating rather high flexibility of the chain are discussed.