MoDTC friction modifier additive degradation: Correlation between tribological performance and chemical changes

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93786-93796 ◽  
Author(s):  
M. De Feo ◽  
C. Minfray ◽  
M. I. De Barros Bouchet ◽  
B. Thiebaut ◽  
J. M. Martin
Keyword(s):  
Molecular Level ◽  
Oxidative Degradation ◽  
Tribological Performance ◽  
Friction Modifier ◽  
Chemical Changes ◽  
Bulk Oil ◽  
Additive Degradation ◽  
Chemical Behaviour ◽  
Thermo Oxidative Degradation

To get a better understanding of how the MoDTC additive works at the molecular level, correlation between its chemical behaviour in a bulk oil during thermo-oxidative degradation and its ability to reduce friction has been investigated.

Thermo-oxidative degradation of polyethylene—III

1977 ◽  
Vol 13 (6) ◽  
pp. 483-487 ◽  
Author(s):  
Arne Holmström ◽  
Arne Andersson ◽  
Ealing M. Sörvik
Keyword(s):  
Oxidative Degradation ◽  
Thermo Oxidative Degradation

KINETIC MODEL FOR THERMAL DEHYDROCHLORINATION OF CHLORINATED NATURAL RUBBER WITH DIFFERENT CHLORINE CONTENT

2014 ◽  
Vol 87 (2) ◽  
pp. 370-382
Author(s):  
Jing Chen ◽  
Lanzhen He ◽  
Yasheng Chen ◽  
Jieping Zhong ◽  
Canzhong He ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Oxidative Degradation ◽  
Storage Conditions ◽  
Chlorine Content ◽  
Heating Process ◽  
Lower Temperature ◽  
Novel Model ◽  
Derivative Thermogravimetry ◽  
Selection Of ◽  
Thermo Oxidative Degradation

ABSTRACT A novel model for calculating dehydrochlorination kinetics at a lower temperature of chlorinated natural rubber (CNR) is presented. It has been observed that dehydrochlorination is complex and involves three different stages. A model that accounts for dehydrochlorination at lower temperature is proposed. The kinetic parameters are obtained from dehydrochlorination experiments at 60–90 °C. The results of the kinetic calculation show that the apparent activation energy decreases with an increment of chlorine content. Higher chlorine content CNR makes it easier to remove hydrochloric acid when heated, but its dehydrochlorination rate affected by temperature is significantly less than that of the sample with a lower chlorine content. The thermogravimetric/derivative thermogravimetry results show that the beginning temperature of thermo-oxidative degradation rises with the increment of chlorine content. During the heating process, the higher chlorine content CNR is more stable than the lower one. The results suggest the storage conditions and basis for selection of appropriate temperature for the preparation of CNR from latex.

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