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INFLUENCE OF CHAIN EXTENDER ON THE UNPERTURBED DIMENSIONS OF POLY(ESTER-URETHANE)S

S. Ioan1,* , D. Macocinschi1, M. Lupu1

Affiliation

  1. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania

Abstract

The dilute solution property of segmented poly(ester urethane)s obtained by the reaction of aromatic diisocyanates with poly(ethylene glycol)adipate and different chain extender, using a multistep polyaddition process was studied by viscometry. A new method proposed by Qian et al. was utilized for determination of unperturbed dimensions of poly(ester urethane)s having different chain extender by the measurement of the intrinsic viscosity at non-theta conditions only. The influence of the chain extender on the unperturbed dimensions and on the flexibility of these polymers was revealed..

Keywords

Poly(ester-urethane)s, Unperturbed dimensions.

Submitted at: July 4, 2003
Accepted at: July 31, 2003

Citation

S. Ioan, D. Macocinschi, M. Lupu, INFLUENCE OF CHAIN EXTENDER ON THE UNPERTURBED DIMENSIONS OF POLY(ESTER-URETHANE)S, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 3, pp. 563-568 (2003)