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The kinetics of the individual key reactions involved in the formation of unsaturated polyester resins have been studied using the very reactive glycol, 2-methyl-1,3-propanediol (MPD). This diol has been reacted in turn with maleic anhydride (MA), phthalic anhydride (PA) and isophthalic acid (IA) under isothermal conditions in the temperature range 180–210 °C and the kinetic constants for the following...
Ring strain is one of the most important factors affecting the polymerizability of a cyclic monomer. In this work, the ring strains in γ-butyrolactone, δ-valerolactone and ϵ-caprolactone were inferred on the basis of infrared and Raman spectroscopy data. The thermodynamic factors influencing the ability to polymerize of these three lactones and other cyclic diesters in the glycolide series were studied...
A Raman spectroscopic study investigating the origin of a number of weak features observed in the Raman spectra of a comprehensive range of organic compounds in the wavenumber range 28002630 cm −1 has been undertaken. These bands have been found to be characteristic of (CH 3 C) groups in the wavenumber region 28002710 cm −1 , and of (CH 2 C) and (CHC) groups below...
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