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- W2023256223 abstract "A sample of poly (trans-1,4-cyclohexylene-dimethylene-oxymethylene oxide) (PTCDM) was synthesized by condensation of trans-1,4-cyclohexane dimethanol and paraformaldehyde using p-toluene sulphonic acid as catalyst. A fraction having Mn=6500 and a melting point of 86°C was isolated and purified; its n.m.r. spectrum does not change with temperature in the range 20°–50°C which indicates a rigid distribution of methylene substituents in the cyclohexane ring; its dipole moment, measured in benzene solution at several temperatures between 20° and 60°C, yielded values of Dn=[μ2]nm2=0.17–0.21 and a temperature coefficient dln {gm2}dT = 5.5 × 10−3K−1, similar to those reported in the literature for acyclic polyformals. Agreement between experimental and calculated (using rotational isomeric states theory) values is satisfactory." @default.
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- W2023256223 date "1981-04-01" @default.
- W2023256223 modified "2023-10-16" @default.
- W2023256223 title "Random-coil configurations of alicyclic polyformals" @default.
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- W2023256223 doi "https://doi.org/10.1016/0032-3861(81)90161-0" @default.
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