Plastics

Plastic Type		Thermal Properties				Density	Strength
Name	Abbrevation	Tm $^\circ C$	Tg $^\circ C$	Td $^\circ C$	Cte $ppm/^\circ C$	g/cc	Compressive (psi)	Tensile (psi)
Polyethylene Terephthalate	PET/PETE	245 265	73 80	21 38	65 -	1.29 1.40	11000 15000	7000 10500
Low Density Polyethylene	LDPE	98 115	-25	40 44	100 220	0.917 0.932	- -	1200 4550
High Density Polyethylene	HDPE	130 137	- -	79 91	59 110	0.952 0.965	2700 3600	3200 4500
Polypropylene	PP	168 175	-20	107 121	81 100	0.900 0.910	5500 8000	4500 6000
Polyvinylchloride	PVC	- -	75 105	57 82	50 100	1.30 1.58	8000 13000	5900 7500
Polystyrene	PS	- -	74 105	68 96	50 83	1.04 1.05	12000 13000	5200 7500

Tm - crystalline melting temperature (some plastics have no crystallinity and are said to be amorphous).
Tg - glass transition temperature (the plastic becomes brittle below this temperature).
Td - heat distortion temperature under a 66 psi load.
Cte - coefficient of linear thermal expansion.
Tensile Strength - load necessary to pull a sample of the plastic apart.
Compressive Strength - load necessary to crush a sample of the plastic.
Density - aka specific gravitymass of plastic per unit volume.

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