Citation: LI Wailang, DING Faxiang, GU Tiren. MONOMOLECULAR FILMS OF COPOLYMERS OF OXYETHYLENE AND OXYPROPYLENE, POLYPROPYLENE GLYCOL AND THEIR BINARY MIXTURES[J]. Chinese Journal of Polymer Science, ;1989, 7(2): 119-123. shu

MONOMOLECULAR FILMS OF COPOLYMERS OF OXYETHYLENE AND OXYPROPYLENE, POLYPROPYLENE GLYCOL AND THEIR BINARY MIXTURES

Received Date: 28 December 1987

The behaviour of monolayers of copolymers of oxyethylene and oxypropylene (UH29 and UH68), polypropylene glycol (UHPPG)and their binary mixtures on air-water interface has been investigated carefully on compression-expansion cycles. The first compression isotherm is approximately an equilibrium one. In the UHPPG-UH29 and UHPPG-UH68 systems, the calculated average π-a curves based on simple additivity of the two individual components coincide with the experimental results reasonably well. It is suggested that the two components are miscible and from near-ideal solution at the air-water interface.The compression-expansion cycle experiments shows some degree of hysteresis.The order of degree of hysteresis for individual components is UH68>UH29>UHPPG.The explanation for the hysteresis is proposed.
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