Recent content by rexol

why use isn't ripstop nylon have sufficient gas permeability resistance?

the most important ingredient in paint is the the binder (polymer) which does not allow oxygen reach the metal substrate. i am not sure but, i think the rust present on the metal is affecting the binder of the paint in some way or the other which is exposing the metal to atmosphere.

Do u want to use a solvent to lower viscosity of melt ? what is the radius of the mold? which is the thermoplastic ?

i am a US citizen from India. We have a courses on both polymer science and engineering. Are there jobs at the undergraduate level in the US in this field or should i take a campus placement in india. There are MNC's recruiting but i cannot imagine them doing good research. it's just a mere...

i feel PVDF due to 2 F on the same C atom will not polarizable to a huge extent. Also F will not be willing to orient the electrons so easily i nthe electric field direction. why can't u use some Cl based polymer instead?

3d is able to contract more, hence it gets involved in hybridisation.

isn't there an inorganic chemistry way to this. I'm not really sure but i do remember finding energy of NaCl by i guess born haber cycle

the reason is electrostatic force of attraction. u need to check quantum physics and the theories B4 that to actually start imagining.

Chill factor - POLYMERS is the root of all questions. check my next thread.

Borek - i do get all of this vector treatment and stuff theoretically. take glass water and glass mercury ( 2 chemically different substrates). is it only the surface tension which decides the wetting of substrate? something like after one value for surface tension for any given...

Chill factor - As far as cellulose is concerned, the hydroxyl bonds, i'd think will play a sure role. so they'll interact with water. i don't think surface energy will influence, bcoz I've never heard professors talking in terms of surface energy. they just say that like substrates, there...

Consider comparasion between same states and same type of materials. also consider the substrates to have same surface quality. a substance with higher cohesive force would have a higher surface energy. this should be because of the stronger cohesive forces between molecules as the molecule...