Products Directory   |    Rubber Trade   |    Classifieds   |    E-Rubber Shop   |    E-Rubber Newsletter   |    Rubber Jobs   |    Home

IRD Services   |    Join Free   |    Add Your Company   |    Premium Membership   |    Advertise With Us   |    Discussion Forum

Search:  
   Quick Products:   Adhesives, Auto & Cycle Parts, Rubber Beltings, More...
  Welcome Guest Login
   Forgot Password | Join Free 4 July,2022

Ask Rubber Experts   |   Rubber News   |    Rubber Prices   |    IRD Network Member      Rubber Events

   IndiaRubberDirectory.com > Rubber Engineering > Elastromer Properties

Elastomer Properties - Stress Relaxation/Retained Sealing Force

Elastomers are viscoelastic in nature. When deformed, energy storage is always accompanied by some energy dissipation. The entanglements of the long elastomer chains act as obstructions to the movement of the polymer chains. These obstructions enable the elastomer to store energy—an elastic property. The rearrangements of the polymer chains are dependent on the specific chemical structure, time, temperature and deformation rate. Since elastomers are viscoelastic, the stored energy decreases over time. This decrease of the stored energy (seen as contact sealing force) over time is known as stress relaxation. In other words, stress relaxation is the change in stress with time when the elastomer is held under constant strain.

Common instruments for measuring stress relaxation are Lucas and Wykeham Farrance. There are three standard methods:

Method A—compression is applied at test temperature and all
force measurements are made at test temperature.

Method B—compression and force measurements are made at ambient temperature.

Method C—compression is applied at ambient temperature and all force measurements are made at test temperature.

The three methods do not give the same values of stress relaxation. The resulting force measurements in all methods can be normalized to the initial counterforce, and expressed as a Retained Sealing Force percent.

Test Methods:

  • ISO 8013—Creep Strain Relaxation
  • ASTM D412—Creep Strain Relaxation—Tensile Properties
  • ISO 3384—Stress Relaxation

 

 

  Rubber Engineering

Rubber Product Manufacturers

Get listed in IRD
Premium listing in IRD

 

 

 

 



 

 










New Page 1

    Rubber Articles
   Technical Papers
   Press Releases
   Rubber Articles
   Rubber Statistics
 
 
 
 
 
 
 
 




Contact Us : www.indiarubberdirectory.com C/o Team Web Power, No.52, First Floor, Anna Nagar Plaza, C-47, IInd Avenue,
Anna Nagar, Chennai 600040. India. 
Phone:- +91-44-42170137 Mobile:- +91-9444001705

|    About Us    |    Vision    |    Disclaimer    |    Privacy Policy     | Sitemap     |    Feedback    |    Contact Us    |    Home    |

Contact Us : www.indiarubberdirectory.com , No.52, First Floor, Anna Nagar Plaza, C-47, IInd Avenue, Anna Nagar, Chennai 600040.Tamilnadu, India.

Phone: +91-44-42170137  Mobile: +91-9444001705  Email:
rubberdirectory@gmail.com