Reference

Interaction parameters and miscibility limits of poly(dimethylsiloxane) and dinonyl phthalate or squalane determined from studies of the absorption of hexane by the binary liquid mixtures

Interaction parameters and miscibility limits of poly(dimethylsiloxane) and dinonyl phthalate or squalane determined from studies of the absorption of hexane by the binary liquid mixtures. Ashworth, Anthony J.; Price, Gareth J. (Sch. Chem., Univ. Bath, Bath BA2 7AY, UK). J. Chem. Soc., Faraday Trans. 1, 81(2), 473-83 (English) 1985. CODEN: JCFTAR. ISSN: 0300-9599. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) Hexane [110-54-3] was used as a probe to det. interactions in liq. mixts. of di-Me siloxane (no.-av. mol. wt. 3350-89,000) with dinonyl phthalate (I) [84-76-4] or squalane [111-01-3] by measuring their absorption of hexane at 303 K using a vacuum microbalance. The data gave consistent interaction parameters between nonvolatile components. These were used to predict miscibility limits to within 3% for the I blends and 4% for squalene blends. Flory-Huggins theory based on vol. fractions gave a better fit to the data and a better estn. of cloud points of partially miscible mixts. than that using segment fractions as in the later Flory theory.

Study of molecular mobility in plasticized poly(vinyl fluoride) by radiothermoluminescence and thermomechanical methods

Study of molecular mobility in plasticized poly(vinyl fluoride) by radiothermoluminescence and thermomechanical methods. Gafirov, A. Kh.; Mukhiddinov, B. F.; Asamov, M. K.; Nikol'skii, V. G.; Filippov, V. V. (Tashk. Gos. Univ., Tashkent, USSR). Vysokomol. Soedin., Ser. B, 26(9), 673-5 (Russian) 1984. CODEN: VYSBAI. ISSN: 0507-5483. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Radiothermoluminescence (RTL) and thermomech. methods were used to study the mol. mobility in poly(vinyl fluoride) (I) [24981-14-4] plasticized with ￡30% dinonyl phthalate (II) [84-76-4] at 77-373 K. Max. RTL intensity was obsd. at 110-140 and 300-350 K. The low-temp. RTL max. of I was shifted to higher temps. by plasticization and its intensity increased with increasing II content. The glass transition temp. detd. from RTL data) and m.p. of I (detd. from thermomech. data) decreased with increasing II content.