Dimensional changes due to water absorption
Dimensional changes due to water absorption
(OP)
I found this old thread that relates to my problem but unfortunately it never got answered.
thread334-73835: Water absorption – Calculating the change on a dimension
I'm fairly sure that the % volumetric change of a component isn't the same as the % water absorption but I assume there must be some relationship even if it's material specific. I would be interested to know what it is, if it exists.
Secondly can anyone tell me what effect pressure has on the water absorption of polymers, and what happens when the pressure is removed?
I'm working on ROVs that are deployed to 3000m and have several components made from a Nylon 66 (probably not a good choice of material) based bearing material and I'd like to be able to quantify the affect of the sea water pressure on the dimensions.
Thanks,
Pete
thread334-73835: Water absorption – Calculating the change on a dimension
I'm fairly sure that the % volumetric change of a component isn't the same as the % water absorption but I assume there must be some relationship even if it's material specific. I would be interested to know what it is, if it exists.
Secondly can anyone tell me what effect pressure has on the water absorption of polymers, and what happens when the pressure is removed?
I'm working on ROVs that are deployed to 3000m and have several components made from a Nylon 66 (probably not a good choice of material) based bearing material and I'd like to be able to quantify the affect of the sea water pressure on the dimensions.
Thanks,
Pete





RE: Dimensional changes due to water absorption
And you are correct - PA6.6 would not be my first choice material either.
No idea of pressure implications though, sorry.
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: Dimensional changes due to water absorption
Pete
RE: Dimensional changes due to water absorption
RE: Dimensional changes due to water absorption
RE: Dimensional changes due to water absorption
RE: Dimensional changes due to water absorption
Chris DeArmitt - PhD FRSC
Plastics & Materials Consulting
www.phantomplastics.com
Plastic Training Seminars
www.plastictraining.com
RE: Dimensional changes due to water absorption
RE: Dimensional changes due to water absorption
You might also look at a free trial of brand new CheFEM prologue simulation software. This program quickly tells you the dimensional change of engineering polymers (including Nylon 6,6) and composites when exposed to a wide range of chemicals (including Water on 3000 meter depth), and a lot more...
Check the program at: CheFEM prologue simulation.
Hope this helps.
Kind regards,
CheFEM development team
RE: Dimensional changes due to water absorption
RE: Dimensional changes due to water absorption