as far as poly vscomposite i will not wear a poly helmetwithout going into the merits or dbacks of snell M, that meet the DOT or EU standards there is little practical difference in the impact protection provided by a good polycarbonate and a good
Acrylonitrile butadiene styrene (ABS) (chemical formula (CH)x· (CH)y· (CHN)z) is a common thermoplastic polymerIts glass transition temperature is approximately °C ( °F). ABS is amorphous and therefore has no true melting pointABS is a terpolymer made by polymerizing styrene and acrylonitrile in the presence of
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