pmma V045 的物性表: | |||
Physical Properties | Metric | English | Comments |
---|---|---|---|
Specific Gravity | 1.19 g/cc | 1.19 g/cc | ASTM D792 |
Water Absorption | 0.30 % | 0.30 % | weight gain after 24 hr. immersion; ASTM D570 |
Linear Mold Shrinkage | 0.0020 - 0.0060 cm/cm | 0.0020 - 0.0060 in/in | ASTM D955 |
Melt Flow | 2.3 g/10 min @Load 3.80 kg, Temperature 230 °C |
2.3 g/10 min @Load 8.38 lb, Temperature 446 °F |
ASTM D1238 |
Mechanical Properties | Metric | English | Comments |
Hardness, Rockwell M | 91 | 91 | ASTM D785 |
Tensile Strength, Ultimate | 70.3 MPa | 10200 psi | ASTM D638 |
Tensile Modulus | 3.10 GPa | 450 ksi | ASTM D638 |
Flexural Strength | <= 103 MPa | <= 15000 psi | ASTM D790 |
Flexural Modulus | 3.10 GPa | 450 ksi | ASTM D790 |
Izod Impact, Notched | 0.160 J/cm | 0.300 ft-lb/in | ASTM D256 |
Thermal Properties | Metric | English | Comments |
Thermal Conductivity | 0.187 W/m-K | 1.30 BTU-in/hr-ft²-°F | ASTM C177 |
Deflection Temperature at 0.46 MPa (66 psi) | 94.4 °C | 202 °F | annealed; ASTM D648 |
Deflection Temperature at 1.8 MPa (264 psi) | 92.8 °C | 199 °F | annealed; ASTM D648 |
Vicat Softening Point | 97.2 °C | 207 °F | 50°C/hr; 50N; ASTM D1525 |
103 °C | 217 °F | 50°C/hr; 10N; ASTM D1525 | |
Optical Properties | Metric | English | Comments |
Refractive Index | 1.49 @Temperature 22.8 °C |
1.49 @Temperature 73.0 °F |
ND; ASTM D542 |
Haze | <= 2.0 % @Thickness 3.17 mm |
<= 2.0 % @Thickness 0.125 in |
ASTM D1003 |
Transmission, Visible | 92 % @Thickness 3.17 mm |
92 % @Thickness 0.125 in |
ASTM D1003 |
PMMA的用途:
PMMA具有质轻、价廉,易於成型等优点。溶于有机溶剂如苯甲醚等,可以形成良好的薄膜和良好的介电性能,可以作为有机场效应管的介质层。
它的成型方法有浇铸,射出成型,机械加工、热成型等。尤其是射出成型,可以大批量生产,制程简单,成本低。因此,它的应用日趋广泛,目前它广泛用于仪器仪表零件、汽车车灯、光学镜片、透明管道等。
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