English Abstract
Dynamic Viscoelastic Properties of Organic Hybrids Consisting of Polymer and Hindered Phenol
Chifei Wu
Institute of Material Science and Technology, East China University of Science and Technology Shanghai,China.
Nippon Gomu Kyokaishi,(2003),76(5), 167-172 General Review in Japanese.

Hindered phenol compound 3,9-bis{ethyl}-2,4,8,10-tetraoxaspiro[5,5]-undecane (AO-80) is polymorphous material with different physical structures. The initial AO-80 is highly crystalline, whereas AO-80 obtained by cooling from melt is an amorphous material. Annealing treatment below the melting point of AO-80 results in structural development. The mixture of chlorinated polyethylene (CPE) and vitrified AO-80 particles exhibits a dramatic change in the dynamic mechanical properties during heat treating at 130 Ž. The change can be attributed to the decomposition of the vitrified AO-80 particles and the hybridization of two constituents. The vitrified AO-80 particles can crystallize again in a CPE matrix by annealing at 100Ž, but the crystal is different from the initial AO-80 in the microstructure. In addition, the incorporation of CPE chains with AO-80 caused a dramatic increase in the modulus. As a result, the AO-80 crystal particles containing some CPE chains act as multifunctional cross-links and the CPE/AO-80 hybrid was found to be a new type of elastomer.

Hindered phenol, Polymorphous, Dynamic mechanical properties, Cholorinated polyethylene