Degree of esterification of pentaerythritol esters of carboxylic acids in relation to thermal-oxidative stability

1975 ◽  
Vol 11 (1) ◽  
pp. 28-30
Author(s):  
L. L. Kalinin ◽  
G. T. Novosartov ◽  
V. K. Krashenninikova ◽  
I. A. Kuz'michenkova
Keyword(s):  
Oxidative Stability ◽  
Carboxylic Acids ◽  
Degree Of Esterification ◽  
Thermal Oxidative Stability ◽  
Esters Of Carboxylic Acids

Evaluation of the thermal oxidative stability of polyimides via TGA techniques

1999 ◽  
Vol 37 (21) ◽  
pp. 3943-3956 ◽  
Author(s):  
Mary Jo Turk ◽  
Asif S. Ansari ◽  
William B. Alston ◽  
Gloria S. Gahn ◽  
Aryeh A. Frimer ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Thermal Oxidative Stability

A New Screen Test for the Thermal Oxidative Stability of Engine Oils - The Glass Panel Coker

2004 ◽  
Author(s):  
Gareth Brown ◽  
Douglas Barr ◽  
Ray Calder ◽  
John Durham ◽  
Rodney McAtee ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Screen Test ◽  
Glass Panel ◽  
Engine Oils ◽  
Thermal Oxidative Stability

Effect of alkylated diphenylamine on thermal-oxidative degradation behavior of poly-α-olefin

2015 ◽  
Vol 69 (7) ◽  
Author(s):  
Mian-Ran Chao ◽  
Wei-Min Li ◽  
Li-Li Zhu ◽  
Hai-Hong Ma ◽  
Xiao-Bo Wang
Keyword(s):  
Activation Energy ◽  
Oxidative Stability ◽  
Oxidative Degradation ◽  
Thermal Oxidative Degradation ◽  
Degradation Behavior ◽  
Thermal Oxidative Stability ◽  
Zinc Dialkyl Dithiophosphate ◽  
Dialkyl Dithiophosphate

AbstractAn oil-soluble antioxidant, alkylated diphenylamine (ADPA), was prepared by alkylation of diphenylamine. The influence of ADPA on the thermal-oxidative stability of poly-α-olefin (PAO8) was evaluated by thermogravimetry (TG). For comparison, the thermal-oxidative stability of PAO8 with zinc dialkyl dithiophosphate (ZDDP) was also investigated. Activation energy (E

STUDY OF AMINO ACID MODIFIERS IN GUAYULE NATURAL RUBBER

2015 ◽  
Vol 88 (2) ◽  
pp. 310-323 ◽  
Author(s):  
Colleen McMahan ◽  
Dhondup Lhamo
Keyword(s):  
Amino Acids ◽  
Natural Rubber ◽  
Oxidative Stability ◽  
Chemical Properties ◽  
The United States ◽  
Thermal Oxidative Stability ◽  
Green Strength ◽  
Strain Induced Crystallization ◽  
New Perspective ◽  
Physical And Chemical

ABSTRACT Guayule, a desert shrub indigenous to the United States, is under development as a source of natural rubber that can be used in place of petroleum-based rubber or Hevea rubber. In natural rubbers, physical and chemical properties can be strongly affected by nonrubber constituents, typically proteins and lipids, present in the material, depending on the plant species and postharvest processing. Hevea natural rubber typically contains high levels of nonrubber constituents that contribute to thermal-oxidative stability, cure acceleration, and especially strain-induced crystallization. The latter has been attributed to compound properties that render Hevea natural rubber uniquely suited for the most demanding rubber applications (e.g., aircraft tires). Hevea proteins are susceptible to hydrolysis, releasing free amino acids into the latex, which can affect rubber and compound properties. Here, low-protein guayule latex was blended with a series of amino acids varying in chemical structure. Bulk viscosity was reduced, thermal-oxidative stability was improved, and cure rate was influenced by the addition of amino acids. Generally, gel formation, green strength, and tensile strength were not affected. The results introduce a new perspective for amino acids as biobased rubber compound additives and provide insights into naturally occurring nonrubber constituents' interaction with natural rubber polymers.

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