Accession Number : AD0641873

Title :   THE SYNTHESIS AND CHARACTERIZATION OF SPIRO POLYMERS,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Volpe,Angelo A. ; Bailey,William J.

Report Date : 09 SEP 1966

Pagination or Media Count : 35

Abstract : The synthesis of the first completely organic spiro polymers is reported. This was accomplished by the acid-catalyzed condensation of pentaerythritol with 1,4-cyclohexanedione and with 1,10-cyclooctadecanedione. The temperature at which 50% decomposition occurs of these polymers was determined by thermo-gravimetric analysis and was found to be in the 400-450C range, which was higher than expected for nonaromatic, oxygen-containing polymers. The proof of structure of these spiro polymers, in which they were shown to be linear polyspiroketals rather than randomly cross-linked polymers, was accomplished by infrared analysis, elemental analysis, X-ray crystallography, intrinsic viscosity measurements, and solubility studies. Several other spiro polymers of lower molecular weight were synthesized and a correlation between molecular weight and thermal stability, as well as solubility, was observed. Finally, a copolymer of pentaerythritol, 1,4-cyclohexanedione and 1,10-cyclooctadecanedione was synthesized and its thermal properties, solubility characteristics, and molecular structure were studied. (Author)

Descriptors :   (*SPIRO COMPOUNDS, *POLYMERS), POLYMERIZATION, CONDENSATION REACTIONS, KETONES, THERMOGRAVIMETRIC ANALYSIS, DECOMPOSITION, THERMAL STABILITY, MOLECULAR STRUCTURE, CROSSLINKING(CHEMISTRY), SYNTHESIS(CHEMISTRY), COPOLYMERIZATION, SOLUBILITY, HEAT RESISTANT PLASTICS

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE