what are the differences between Nylon , PE and PP?

Answer 1

There are many types of nylon, but they all are polyamides of relatively low molecular weight (at least compared to PE and PP). Generally they are manufactured by reaction of diacids and diamines, although there are other useful methods. Nylons have strong interchain interactions which result in very strong tensile strengths. For that reason their use is primarily in fibers.

PE is polyethylene. This is a plastic that is used in consumer products. It is made from the monomer ethylene (CH2=CH2), so all PEs are chemically similar, but depending on how it is made, it can have differing physical properties. PE is the cheapest of all the synthetic polymers; therefore, whenever it can be used for a specific application, it usually is.

PP is polypropylene. It is chemically similar to PE but is made from the monomer propylene (CH3CH=CH2). This can be prepared from fewer reactions than PE, but it is much tougher and stronger than PE, even after molding, because it has more self-crystallizing capacity. A lot of consumer goods are made from PP for this reason.

Answer 2

Pp Pe Plastic

Answer 3

These are three resin chemically different, in the fact that theri monomers are very different. If you want to compare the monomers of these resins I suggest you to go to :
www.wikipedia.com

make a search for each of these resins and compare.