Polymer Stability in Engines Röhm GmbH

Format:

Conference/Event

Author/Creator:

Wunderlich, W., author.

Conference Name:

1978 Automotive Engineering Congress and Exposition (1978-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1978

Summary:

Polymeric mineral oil additives are exposed to mechanical and thermo-oxidative degradation processes in the engine. For long lasting efficiency, they must show the highest possible stability to such attacks. The degradation processes are evident from and distinguishable by the molecular weight distribution of the polymer which can be measured with great accuracy by gel permeation chromatography (GPC), even for used oils. Results of such measurements are given for various types of VI improvers (polyalkyl methacrylates, ethylene-propylene copolymers and hydrogenated styrene-diene block copolymers) after exposure to Diesel and Otto engines. The influence of mechanical and thermo-oxidative degradation is discussed by means of model calculations. Comparative viscosity data elucidate the picture obtained from the distribution measurements

Notes:

Vendor supplied data

Publisher Number:

780372

Access Restriction:

Restricted for use by site license