Currently i am working on polymer composite thin films, so i am little bit confused about the accurate specimen specification.
Dear Abrar,
As you have already the both standards (ASTM D882 and ASTM D6287), you must to evaluate their requirements and to apply them to your specific conditions (number of films available for testing, possibility to cut specimens with some specific geometry, e.g. rectangular; uniformity; thickness; nature of polymer to select the best conditions of testing, etc.)
Based on some practical experience, I will say that it is very important to eliminate the influence on final results & mechanical characteristics of some parameters (wideness, thickness, errors in measurement, etc.), thus the cutting of specimens from larger films could be a good solution.
However, please consider that using rectangular films, in many cases they will be broken in zone where are fixed in grips (this is due to an additional solicitation at the level of grips). To have the break near center region you can cut from films specimens showing a 'dogbone' shape as described in ASTM-D638…
About the testing of films you can find some videos via internet…I assume that other RG colleagues will help you with additional info.
Best regards and good luck in 2017 for you and… your R&D studies,
Marius
https://www.youtube.com/watch?v=7zlXSQ1OFf4
https://www.youtube.com/watch?v=rRMsMf_VaeY
https://www.youtube.com/watch?v=x_Hy02HhSAM
Dear Abrar,
As you have already the both standards (ASTM D882 and ASTM D6287), you must to evaluate their requirements and to apply them to your specific conditions (number of films available for testing, possibility to cut specimens with some specific geometry, e.g. rectangular; uniformity; thickness; nature of polymer to select the best conditions of testing, etc.)
Based on some practical experience, I will say that it is very important to eliminate the influence on final results & mechanical characteristics of some parameters (wideness, thickness, errors in measurement, etc.), thus the cutting of specimens from larger films could be a good solution.
However, please consider that using rectangular films, in many cases they will be broken in zone where are fixed in grips (this is due to an additional solicitation at the level of grips). To have the break near center region you can cut from films specimens showing a 'dogbone' shape as described in ASTM-D638…
About the testing of films you can find some videos via internet…I assume that other RG colleagues will help you with additional info.
Best regards and good luck in 2017 for you and… your R&D studies,
Marius
https://www.youtube.com/watch?v=7zlXSQ1OFf4
https://www.youtube.com/watch?v=rRMsMf_VaeY
https://www.youtube.com/watch?v=x_Hy02HhSAM
Sumit - publishing ASTM (or ISO) standards is unethical and illegal. These standards organizations exist solely on the basis of sales of their standards. Your best course of action is to delete your post. Are you an ASTM member?
Dear Abrar,
I totally agree with the advice and suggestion of Mr. Rawle. In fact, it is highly recommended to not publish ASTM standards on the RG web site, and to prevent any inconvenience due to the protection laws.
However, you can change privately, or via RG site, some advices and recommendations with other RG scientists that can be helpfully to apply these standards for a particular case. Maybe this dialogue is between the key-resources of RG site…
Good luck and best regards,
Marius
https://www.youtube.com/watch?v=xse4G37qXfg
For completeness, I attach a screen dump of the missing post (with non-working links)
Abrar, we can't share the ASTM standards with you due to copyrights so I'm adding the link below that shows how testing is performed. Hope this helps!
Deniz
http://www.admet.com/testing-applications/testing-standards/astm-d882-thin-plastic-film-tensile-testing/
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