聚甲基丙烯酸甲酯,粉末, PMMA, Acrylic, Natural, 600μm最大粒度, Spherical

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品牌:	Goodfellow
产地:	英国

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Colour[颜色]	Natural
Description[描述]	Injection Moulding Grade
Grade[等级]	Additive Free Polymer
Maximum Particle Size[最大粒度]	600μm
Product Shape[形状]	Spherical
Weight[重量]	100g - 10000g
Physical Properties(物理性质)
Abbe number	57.2
Density ( g cm?? )	1.190
Flammability	HB
Limiting oxygen index ( % )	17 - 20
Radiation resistance	Fair
Refractive index	1.490
Resistance to Ultra-violet	Good
Water absorption - over 24 hours ( % )	0.200
Mechanical Properties(机械性能)
Elongation at break ( % )	2.5 -4.0
Hardness - Rockwell	M92-100
Izod impact strength ( J m?? )	16.0 - - 32.0
Poisson's ratio	0.350 - 0.400
Tensile modulus ( GPa )	2.40 - 3.30
Tensile strength ( MPa )	80.00
Electrical Properties(电气特性)
Dielectric constant @1MHz	3
Dielectric strength ( kV mm?? )	15.0
Dissipation factor @ 1MHz	0.0140
Surface resistivity ( Ohm/sq )	10??
Volume resistivity ( Ohmcm )	2-14x10??
Thermal Properties(热性能)
Coefficient of thermal expansion ( x10?? K?? )	70.000 - 77.000
Heat-deflection temperature - 0.45MPa ( C )	105
Heat-deflection temperature - 1.8MPa ( C )	95.0
Lower working temperature ( C )	-40
Specific heat ( J K?? kg?? )	1400.0 - 1500.0
Thermal conductivity ( W m?? K?? )	0.17 - 0.19 @23℃
Upper working temperature ( C )	50 - 90
Chemical Resistance(耐化学性)
Acids - concentrated	Good-Poor
Acids - dilute	Good-Poor
Alcohols	Good-Poor
Alkalis	Good
Aromatic hydrocarbons	Poor
Greases and Oils	Good
Halogenated Hydrocarbons	Poor
Halogens	Poor
Ketones	Poor