⚗ Polymers Forum

Energy absorption of foam

Hi, I am faced with a little problem. I have a pyramid (or another shape) in foam. I know its impact compression (stres...

3 comments posted 22yrs

posted by jbrodel

3 comments posted 22yrs posted by jbrodel

Flexural rigidity n flexural modulus

what is the difference between flexural rigidity n flexural modulus ?

1 comments posted 22yrs

posted by lvanya

1 comments posted 22yrs posted by lvanya

irradiated wood?

Some decades ago, research somewhere was done on the effect of heavy ionizing radiation on wood and/or cellulose. Some...

2 comments posted 22yrs

posted by mitcheroo

2 comments posted 22yrs posted by mitcheroo

Re: Creating Forming Styrofoam (dinnerware like) Parts??

FOSECO http://www.foseco.com/moulding.htm They make custom lost foam patterns. Tooling isn't cheap. Price based on volu...

3 comments posted 22yrs

posted by mike_d2

3 comments posted 22yrs posted by mike_d2

Polycarbonate

I need to glue or bond two pieces of polycarbonate forms together. The bond needs to be very strong since it will carry...

6 comments posted 22yrs

posted by hit.it

6 comments posted 22yrs posted by hit.it

polyimide formula

hi would someone be so kind as to tell me what the chemical formula of polyimde (vespel) is. an internet search produce...

2 comments posted 22yrs

posted by ich

2 comments posted 22yrs posted by ich

Looking for a simple stretching device used in stress relaxation test

as subject I'm looking for that device. Have someone know this kind of device and where can I find it? not as big as In...

1 comments posted 22yrs

posted by tl11

1 comments posted 22yrs posted by tl11

Measurement of dose C-black in plastics

Hello, Can somebody give me a method for a quantitative determination from carbon black in plastis (platicized pvc) ? Be...

1 comments posted 22yrs

posted by jean.dekens

1 comments posted 22yrs posted by jean.dekens

Re: EVA (ethylene-vinyl acetate ) toxicity Off-gassing?

I think you need to define toxins. Most of us would not consider PVC to off gas toxic products. What chemical species a...

3 comments posted 22yrs

posted by ljeffler

3 comments posted 22yrs posted by ljeffler

UV sensitizers for higher shelf-life and water miscible for photopolymerisation

We don't know where we can get UV SENSITZERS for polyvinyl alcohol/polyvinyl acetate. Does anyone know where can get the...

0 comments posted 22yrs

posted by mbehc

0 comments posted 22yrs posted by mbehc

Fluoropolymers for Architectural Coatings (2026 Update)

I'm told that fluor ethylene vinyl ethers (FEVEs) are the best bet when you want long term (30 year) fade resistance. I...

14 comments posted 22yrs

posted by Likes2_eat

14 comments posted 22yrs posted by Likes2_eat

Non-toxic, non-offgassing non-slip tiles/mats?

Most of the non-slip mats I can find out there are made of either PVC or vulcanized rubber. Can anyone point me in a di...

1 comments posted 22yrs

posted by speak2joe

1 comments posted 22yrs posted by speak2joe

daughter's drop radius

I seek a mathematical expression, that give me the daughter's drop radius in function of the deformation rate along the...

0 comments posted 22yrs

posted by nat-domingues

0 comments posted 22yrs posted by nat-domingues

Re: Polypropylene

> As part of a research study for polypropylene (PP) filters I am > interested in different analysis techniques to indi...

1 comments posted 22yrs

posted by the mekon

1 comments posted 22yrs posted by the mekon

Re: How to etch the rubber particles in the ethlyene propylene rubber (EPR) for SEM ?

> Purpose: to see the morphology of EPR ( distribution of rubber particles) by > SEM > > What I have known now is > Use...

0 comments posted 22yrs

posted by the mekon

0 comments posted 22yrs posted by the mekon