Polymer Property and performance	Name of Polymer
Polymer Property and performance	HDPE (Resin)	HDPE pipe	PEX-A Pipe (MDPE)	PEX-B Pipe (MDPE)
Surface Chemistry	Carbonyls formed	Carbonyls formed	Unchanged	Carbonyls formed
OIT	40% reduction	95% Reduction	Unchanged	65% reduction
Bulk density	Unchanged	Slight increase	Unchanged	Unchanged
Mechanical Strength	Unchanged	Unchanged	Unchanged	32% reduction and 60% reduction in elongation at break
Non polar contaminants	Solubility unchanged Diffusivity unchanged	Solubility unchanged Diffusivity unchanged		Solubility unchanged Diffusivity unchanged
Polar contaminants	Solubility unchanged Diffusivity increased by 40%	Solubility unchanged Diffusivity increased by 30%	Solubility slightly increased Diffusivity unchanged	Solubility slightly decreased, Diffusivity increased 20%