Viscosity of Perfluoropolyether Lubricants: Influence of Structure, Chain Dimensions and Molecular Interactions Ausimont R and D Centre

Format:

Conference/Event

Author/Creator:

Marchionni, Giuseppe, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1992-10-19 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1992

Summary:

Several copolymeric perfluoropolyether (PFPE) lubricants, produced by Ausimont via the photooxidative method, and having the following names and schematic structures:have been studied with respect to the following molecular and physical characteristics:The extensive data collected on a number of PFPE oils of different structure, composition and molecular weight have been used to show the complex interrelationship existing between the various structural parameters that control the viscosity of these lubricants.For one of the three family investigated, the Z series, in which CF3 side groups are absent, and for related homopolymers, the viscosity appears to be dependent, through the glass transition temperature Tg, on the intermolecular interaction energy, or CED, which itself is controlled, at hight M, only by the chemical composition of the copolymer (ratio O/C).The second variable influencing viscosity is molecular weight, although the M dependence is weaker than that typical of other high molecular weight polymers, due to the fact that PFPE oils have relatively short chain lengths

Notes:

Vendor supplied data

Publisher Number:

922289

Access Restriction:

Restricted for use by site license