Degradation Pattern of Polymeric Viscosity Index Improvers in Cross-Graded Engine Lubricants Indian Oil Corporation Limited, Research and Development Center, Sector-13, Faridabad-121 007, India

Format:

Conference/Event

Author/Creator:

Ramakumar, S.S.V., author.

Conference Name:

SIAT 2001 (2001-01-10 : Pune, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Pune, MH The Automotive Research Association of India 2001

Summary:

Polymeric VI improvers of cross-graded engine lubricants are prone for degradation due to both mechanical and thermal shearing. However, till now, all the engine oil specifications focus only on their resistance towards mechanical degradation. In the present study, an attempt has been made to assess the extent of polymeric degradation due to thermal shearing by using some commonly employed polymeric VI improvers and their combinations. Data generated in mechanical and thermal shearing experiments has been correlated with high temperature high shear (HT-HS) viscosity data of these sheared and unsheared oils. All these findings are further augmented by comparing relative changes in their molecular weights and molecular weight distribution profile, as obtained by gel permeation chromatographic analysis of the experimental oils

Notes:

Vendor supplied data

Publisher Number:

2001-28-0038

Access Restriction:

Restricted for use by site license