Tính chất của nhựa PP

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PP Detailed Properties

(Polypropylene)

Polypropylene is available in several grades and  types.  The table below lists a generally accepted summary of properties that we believe to be reliable, however, for specific information on a particular grade, please contact us.   Determination of resin is dependent on the application and this table is only meant to serve as a general guideline.

PP Properties	ASTM	UNIT	PP
MECHANICAL PROPERTIES
Specific Gravity	D792		0.905
Elongation	D638	%	10~20
Tensile Strength	D638	psi	4,800
Flexural Strength	D790	psi	5,400
Compressive Strength	D695		6,000
Tensile Elastic Modulas  (Young's Modulas)	D638	(10~5)psi	1.6
Flexural Modulas	D790	(10~5)psi	1.7~2.5
Hardness Durometer	D785	Rockwell R	80~110
Impact Strength IZOD 73°F/23°C	D256	notched ft/lbs/in	0.5~2.2
THERMAL PROPERTIES
Melting Point		°C (°F)	121 (250)
Upper Service Temperature(20,000h)		°C (°F)	104 (220)
Flame Rating**		UL94	n.r.
Thermal Conductivity	C117	10~4 cal/sec/cm2,ºC/cm	2.8
ELECTRICAL PROPERTIES
Dielectric Constant	D150	1kHz	2.2~2.6
Dissipation Factor	D150	1kHz	0.0005~0.0018
Dielectric Strength	D149	125 v/mil.	475~660
Volume Resistivity	D257	ohm-cm at 73ºF, 50% RH	10~17
GENERAL PROPERTIES
Chemical/Solvent Resistance			Excellent
Water Absorption, 24h	D570	%	<0.03
Refractive Index
Arc Resistivity	D495	sec	100~160

 nguồn : http://www.texcal.us/coaxialwire/ppproperties.html