Effect of amino and polysiloxane groups on the chemical adsorption of polymers containing thiophosphate at the oil/metal interface under extreme pressure

Sheng Chung Ni, Ping-Lin Kuo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Copolymers that separately contained thiophosphate-polysiloxane, thiophosphate-amino, and thiophosphate-polysiloxane-amino groups were synthesized and characterized. The performances of these synthesized copolymers on metal surfaces under a high load and rotary velocity were examined by the measurement of the oil temperature, frictional coefficient, and electrical contact resistance between two metal surfaces. The configuration of the adsorption layer was studied with energy-dispersive spectrometry (EDS) and scanning electron microscopy (SEM). Copolymers that contained amino-thiophosphate groups reduced the frictional coefficient between two metal surfaces and markedly limit the increase in the oil temperature. Notably, a higher content of polysiloxane groups in the copolymer corresponded to an increased operating time to establish the adsorption layer on the metal surface. However, a higher content of amino groups reduced the time required for the layer to form. The adsorption layers that formed on the metal surfaces were investigated by EDS as phosphides produced by a chemical reaction of the thiophosphate-containing copolymer with the metal surface. These adsorption layers on the metal surface were directly observed with SEM. The layer that formed on the metal surface of copolymers containing less polysiloxane and more amino groups was the thickest layer for all the synthesized copolymers.

Original languageEnglish
Pages (from-to)1795-1803
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume40
Issue number17
DOIs
Publication statusPublished - 2002 Sep 1

Fingerprint

Siloxanes
polysiloxanes
Silicones
metal surfaces
Polymers
Oils
oils
Metals
copolymers
Copolymers
Adsorption
adsorption
polymers
metals
Spectrometry
phosphides
Scanning electron microscopy
scanning electron microscopy
thiophosphoric acid
Contact resistance

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

@article{911bd0e5792e458ebf6d891aeb4075e3,
title = "Effect of amino and polysiloxane groups on the chemical adsorption of polymers containing thiophosphate at the oil/metal interface under extreme pressure",
abstract = "Copolymers that separately contained thiophosphate-polysiloxane, thiophosphate-amino, and thiophosphate-polysiloxane-amino groups were synthesized and characterized. The performances of these synthesized copolymers on metal surfaces under a high load and rotary velocity were examined by the measurement of the oil temperature, frictional coefficient, and electrical contact resistance between two metal surfaces. The configuration of the adsorption layer was studied with energy-dispersive spectrometry (EDS) and scanning electron microscopy (SEM). Copolymers that contained amino-thiophosphate groups reduced the frictional coefficient between two metal surfaces and markedly limit the increase in the oil temperature. Notably, a higher content of polysiloxane groups in the copolymer corresponded to an increased operating time to establish the adsorption layer on the metal surface. However, a higher content of amino groups reduced the time required for the layer to form. The adsorption layers that formed on the metal surfaces were investigated by EDS as phosphides produced by a chemical reaction of the thiophosphate-containing copolymer with the metal surface. These adsorption layers on the metal surface were directly observed with SEM. The layer that formed on the metal surface of copolymers containing less polysiloxane and more amino groups was the thickest layer for all the synthesized copolymers.",
author = "Ni, {Sheng Chung} and Ping-Lin Kuo",
year = "2002",
month = "9",
day = "1",
doi = "10.1002/polb.10233",
language = "English",
volume = "40",
pages = "1795--1803",
journal = "Journal of Polymer Science, Part B: Polymer Physics",
issn = "0887-6266",
publisher = "John Wiley and Sons Inc.",
number = "17",

}

TY - JOUR

T1 - Effect of amino and polysiloxane groups on the chemical adsorption of polymers containing thiophosphate at the oil/metal interface under extreme pressure

AU - Ni, Sheng Chung

AU - Kuo, Ping-Lin

PY - 2002/9/1

Y1 - 2002/9/1

N2 - Copolymers that separately contained thiophosphate-polysiloxane, thiophosphate-amino, and thiophosphate-polysiloxane-amino groups were synthesized and characterized. The performances of these synthesized copolymers on metal surfaces under a high load and rotary velocity were examined by the measurement of the oil temperature, frictional coefficient, and electrical contact resistance between two metal surfaces. The configuration of the adsorption layer was studied with energy-dispersive spectrometry (EDS) and scanning electron microscopy (SEM). Copolymers that contained amino-thiophosphate groups reduced the frictional coefficient between two metal surfaces and markedly limit the increase in the oil temperature. Notably, a higher content of polysiloxane groups in the copolymer corresponded to an increased operating time to establish the adsorption layer on the metal surface. However, a higher content of amino groups reduced the time required for the layer to form. The adsorption layers that formed on the metal surfaces were investigated by EDS as phosphides produced by a chemical reaction of the thiophosphate-containing copolymer with the metal surface. These adsorption layers on the metal surface were directly observed with SEM. The layer that formed on the metal surface of copolymers containing less polysiloxane and more amino groups was the thickest layer for all the synthesized copolymers.

AB - Copolymers that separately contained thiophosphate-polysiloxane, thiophosphate-amino, and thiophosphate-polysiloxane-amino groups were synthesized and characterized. The performances of these synthesized copolymers on metal surfaces under a high load and rotary velocity were examined by the measurement of the oil temperature, frictional coefficient, and electrical contact resistance between two metal surfaces. The configuration of the adsorption layer was studied with energy-dispersive spectrometry (EDS) and scanning electron microscopy (SEM). Copolymers that contained amino-thiophosphate groups reduced the frictional coefficient between two metal surfaces and markedly limit the increase in the oil temperature. Notably, a higher content of polysiloxane groups in the copolymer corresponded to an increased operating time to establish the adsorption layer on the metal surface. However, a higher content of amino groups reduced the time required for the layer to form. The adsorption layers that formed on the metal surfaces were investigated by EDS as phosphides produced by a chemical reaction of the thiophosphate-containing copolymer with the metal surface. These adsorption layers on the metal surface were directly observed with SEM. The layer that formed on the metal surface of copolymers containing less polysiloxane and more amino groups was the thickest layer for all the synthesized copolymers.

UR - http://www.scopus.com/inward/record.url?scp=0036727454&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036727454&partnerID=8YFLogxK

U2 - 10.1002/polb.10233

DO - 10.1002/polb.10233

M3 - Article

VL - 40

SP - 1795

EP - 1803

JO - Journal of Polymer Science, Part B: Polymer Physics

JF - Journal of Polymer Science, Part B: Polymer Physics

SN - 0887-6266

IS - 17

ER -