Accession Number : AD0702753

Title :   THE GLASS TRANSITIONS OF ALIPHATIC IONENES.

Descriptive Note : Technical rept.,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC)

Personal Author(s) : Eisenberg,A. ; Matsuura,H. ; Yokoyama,T.

Report Date : 20 MAR 1970

Pagination or Media Count : 25

Abstract : The glass transition temperatures of a wide range of ionenes have been studied as a function of the spacing of ions and the dielectric constant of the plasticizer. For solvents of a high dielectric constant the extrapolated glass transition of most ionenes has a value of ca. OC, while for plasticizers of a low dielectric constant the value centers around -80C. It is suggested that a conformational transition is responsible for this drastic change in the extrapolated Tg values. A q/a effect was also found, the slope of the Tg vs. q/a plot being 695, i.e. quite similar to that for the phosphates, silicates and acrylates. (Author)

Descriptors :   (*POLYMERS, TRANSITION TEMPERATURE), (*AMMONIUM COMPOUNDS, POLYMERS), IONS, ALKANES, CANADA

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE