CALCULATION OF THE GLASS TEMPERATURES OF POLYMERS HAVING ALKYL SIDE-CHAINS.
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
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Four equations, relating the glass temperatures TGs of polymers to invariant temperature parameters associated with their constituent groups, but weighted in different ways, were applied to the calculation of the TGs of 7 series of polymers having alkyl side-chains. It is shown that the TGs of the 32 polymers considered may be expressed as the sum of the mole fractions of the parameters within maximum and mean errors of 11 and 4K, respectively. The temperature parameter for a sequence of 3, or more, methylene groups is correctly estimated as 153K. Nearest neighbour interactions, stereoregularity, and crystallinity effects are discussed. Author
- Atomic and Molecular Physics and Spectroscopy