材料 >> 聚合物材斘/div>
聚甲基丙烯酸甲酯? PMMA, Acrylic, 20mm直径
产品介绍
| 订货叶/strong> |
包装规格 |
| Length (Round) |
| 655-610-14 |
165 mm |
产品参数
| Diameter[直径] |
20mm |
| Grade[等级] |
High Purity |
| Length[长度] |
165 mm |
| Type[类型] |
Free from UV Absorber |
| 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? |
| 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 @23ℂ/td> |
| Upper working temperature ( C ) |
50 - 90 |
| Chemical Resistance(耐化学? |
| 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 |
其他参数
公差
| 直径 |
?0mm |
10% |
| 聚合?/td> |
+20% / -10% |
| 陶瓷 |
+20% / -10% |
|
| >10mm |
5% |
| 陶瓷 |
+20% / -10% |
| 聚合?/td> |
+20% / -10% |
|
| 长度 |
<100mm |
1mm |
| ?00mm |
+5% / -1% |
|
|
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