Organic hybrid of chlorinated polyethylene and hindered phenol. II. Influence of the chemical structure of small molecules on viscoelastic properties

The viscoelastic properties and stabilities of those properties of organic hybrids consisting of chlorinated polyethylene (CPE) and tetrakis [methylen e-3-(3-5-di-tert-butyl-4-hydroxy phenyl)propionyloxy]methane (AO-60) and tr iethylene glycol bis[3-(3-tert-butyl-4-hydroxy-5-methyl phenyl)propionyloxy ] (AO-70) were investigated. The CPE/AO-70 hybrids show only one transition , whereas for the CPE/AO-60 hybrids, one novel relaxation appears above the glass-transition temperature of CPE. This relaxation on the higher tempera ture side in the mechanical spectrum for CPE/AO-60 is associated with the a ppearance of the AO-60-rich phase. Furthermore, the stabilities of the visc oelastic properties and microstructures of the organic hybrids consisting o f CPE and multifunctional hindered phenols are dominated by the strength of the intermolecular interaction between CPE and phenols and the conformatio ns of the middle skeletal parts of hindered phenols. (C) 2000 John Wiley & Sons, Inc.