Low-temperature dynamic mechanical properties of thermal aging of hydroxyl-terminated polybutadiene-based propellant

2021 ◽  
Author(s):  
Bing Long ◽  
Xiangdong Chen ◽  
Hongliang Wang
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Thermal Aging ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Temperature Dynamic

Dynamic Mechanical Properties of a Number of Elastomers and Related Polymers from 4 to 250° K

1972 ◽  
Vol 45 (4) ◽  
pp. 1033-1042
Author(s):  
R. J. Morgan ◽  
L. E. Nielsen ◽  
R. Buchdahl
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Bond Angle ◽  
Dynamic Mechanical Properties ◽  
Molecular Packing ◽  
Butyl Rubber ◽  
Monomeric Unit ◽  
Dynamic Mechanical ◽  
Young’S Moduli ◽  
Cis And Trans

Abstract Young's modulus and mechanical damping have been measured down to 4° K for cis- and trans-polybutadienes, cis- and trans-polyisoprenes, butyl rubber, and random SBR copolymers. Trans-polybutadiene has two large damping peaks below Tg, trans-polyisoprene one peak, while the cis-polymers and butyl rubber show either no damping peaks or only very small ones below Tg. The low-temperature damping peaks of the trans-polymers might be explained by a type of crankshaft motion and by a special motion of the trans-monomeric unit which involves a simultaneous vibration and bond angle deformation. The high Young's moduli of the polybutadienes compared to the polyisoprenes and the SBR copolymers are explained by the good molecular packing of the polybutadienes.

Thermal aging, physico‐mechanical, dynamic mechanical properties of chlorinated polyethylene/red mud composites

2020 ◽  
Vol 41 (11) ◽  
pp. 4740-4749
Author(s):  
Liyan Qiu ◽  
Ajit D. Phule ◽  
Yingxia Han ◽  
Shibao Wen ◽  
Zhen‐Xiu Zhang
Keyword(s):  
Mechanical Properties ◽  
Thermal Aging ◽  
Red Mud ◽  
Dynamic Mechanical Properties ◽  
Chlorinated Polyethylene ◽  
Dynamic Mechanical

Effects of Thermal Aging on The Mechanical Properties of Natural Rubber

2003 ◽  
Vol 76 (4) ◽  
pp. 785-802 ◽  
Author(s):  
Joseph T. South ◽  
Scott W. Case ◽  
Kenneth L. Reifsnider
Keyword(s):  
Mechanical Properties ◽  
Thermal Degradation ◽  
Natural Rubber ◽  
Thermal Aging ◽  
Master Curve ◽  
Dynamic Mechanical Properties ◽  
Rubber Compound ◽  
Dynamic Mechanical ◽  
Rubber Vulcanizate

Abstract The focus of this research was to investigate the effect of thermal degradation upon the mechanical properties of a natural rubber compound. We examined both the quasi-static and dynamic mechanical properties of a natural rubber vulcanizate which had been subjected to isothermal, anaerobic aging. The thermal aging was conducted between the temperatures of 80 °C and 120 °C for times ranging from 3 to 24 days. The effect of thermal degradation was measured using the changes in the crosslink distribution of the vulcanizates as functions of time at temperature. A master curve relationship between the crosslink distribution of the vulcanizates due to thermal degradation and the static and dynamic mechanical properties has been developed. It was found that the both the quasi-static and dynamic mechanical properties correlated with the percentage of poly and monosulfidic crosslinks, where in general higher levels of polysulfidic crosslink gave rise to the highest mechanical properties.

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