polymer difference?

Question

what 's diffrent between BMC with ABS?

Answer 1

ABS - acrylonitrile-butadiene-styrene terpolymer
BMC - bulk molding compound

ABS is a "pure" co-polymer (3 monomers involved in the polymer structure), amorphous type, with the following general characteristics:
- a wide melting range,
- low shrinkage after molding,
- better impact and lower chemical resistance than crystalline polymers,
- moderate heat resistance,
- dimensional stability,
- and superior cosmetics of outer surfaces.
It's what's called a thermoplastic polymer. Once melted it takes the shape of the mould but can be remelted after.

BMC is a polyester resin/glass fibre premix, for injection or transfer moulding, also known as dough moulding compound (DMC). It's also called "cement polymer". It belongs to the thermoset class of polymers, so once melted the 3D structure changes and can not be recast.

Composition, aspect, use, etc... are different.

Answer 2

ABS - acrylonitrile-butadiene-styren... terpolymer
BMC - bulk molding compound

ABS is a "pure" co-polymer (3 monomers involved in the polymer structure), amorphous type, with the following general characteristics:
- a wide melting range,
- low shrinkage after molding,
- better impact and lower chemical resistance than crystalline polymers,
- moderate heat resistance,
- dimensional stability,
- and superior cosmetics of outer surfaces.
It's what's called a thermoplastic polymer. Once melted it takes the shape of the mould but can be remelted after.

BMC is a polyester resin/glass fibre premix, for injection or transfer moulding, also known as dough moulding compound (DMC). It's also called "cement polymer". It belongs to the thermoset class of polymers, so once melted the 3D structure changes and can not be recast.

Answer 3

They are made up of different monomers, same linking pattern.