Stress Relaxation Behavior of A Liquid Silicone Rubber Seal Subjected to Temperature Cycling

2011 ◽  
Keyword(s):  
Stress Relaxation ◽  
Silicone Rubber ◽  
Temperature Cycling ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Rubber Seal ◽  
Liquid Silicone Rubber ◽  
Liquid Silicone

Effect of Temperature Cycling on Stress Relaxation Behavior of Electrical Connector Contacts

2014 ◽  
Vol 492 ◽  
pp. 86-89 ◽  
Author(s):  
Yan Yan Luo ◽  
Li Xin Wang ◽  
Ke Li ◽  
Ming Ming Lei ◽  
Guo Jin Liu ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Temperature Variation ◽  
Degradation Process ◽  
Temperature Cycling ◽  
Relaxation Behavior ◽  
Test Method ◽  
Effect Of Temperature ◽  
Stress Relaxation Behavior ◽  
Electrical Connector ◽  
Electrical Connectors

This paper mainly studies the effect of temperature cycling on stress relaxation behavior of contacts for electrical connectors. Based on the analysis of the test specifications of electrical connectors, this paper provides a kind of test method on stress relaxation behavior of electrical connector contacts under temperature cycling conditions. The detecting circuit is designed; the test is carried out and finally, according to the test data, it can be concluded that 1) for the same temperature change, the absolute change of strain within the temperatures above zero is bigger than that within the subzero temperatures; 2) the deformation of contacts gradually increases as the number of cycles increases. The length of the degradation process for electrical connectors might be related with the high temperature value, temperature variation or temperature variation rate.

Effects of accelerator type on stress relaxation behavior and network structure of aged natural rubber/chloroprene rubber vulcanizates

2016 ◽  
Vol 49 (5) ◽  
pp. 381-396 ◽  
Author(s):  
Farzad A Nobari Azar ◽  
Murat Şen
Keyword(s):  
Stress Relaxation ◽  
Natural Rubber ◽  
Network Structure ◽  
Structural Changes ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Rubber Blends ◽  
Chloroprene Rubber ◽  
Weather Changes ◽  
Behavior Network

Natural rubber/chloroprene rubber (NR/CR) blends are among the commonly used rubber blends in industry and continuously are exposed to severe weather changes. To investigate the effects of accelerator type on the network structure and stress relaxation of unaged and aged NR/CE vulcanizates, tetramethyl thiuram disulfide, 2-mercaptobenzothiazole, and diphenyl guanidine accelerators have been chosen to represent fast, moderate, and slow accelerator groups, respectively. Three batches have been prepared with exactly the same components and mixing conditions differing only in accelerator type. Temperatures scanning stress relaxation and pulse nuclear magnetic resonance techniques have been used to reveal the structural changes of differently accelerated rubber blends before and after weathering. Nonoxidative thermal decomposition analyses have been carried out using a thermogravimetric analyzer. Results indicate that there is a strong interdependence between accelerator type and stress relaxation behavior, network structure, cross-linking density, and aging behavior of the blends. Accelerator type also affects decomposition energy of the blends.

scholarly journals Stress-relaxation behavior in gels with ionic and covalent crosslinks

2010 ◽  
Vol 107 (6) ◽  
pp. 063509 ◽  
Author(s):  
Xuanhe Zhao ◽  
Nathaniel Huebsch ◽  
David J. Mooney ◽  
Zhigang Suo
Keyword(s):  
Stress Relaxation ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Covalent Crosslinks
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