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【求助】求PVDF的材料特性
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计算中需要用到pvdf的弹性模量系数，压电系数，介电常数，但是搜索了很多资料，都没有找到完整的矩阵。很多只提供了部分的参数，比如：c11，c22，c33，d31，d32，d33，epsilon33. 对材料一窍不通，望高人指点！学生愿用每天赌来的所有金币报答！ |
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overgift(金币+3):谢谢参与
overgift(金币+3):谢谢参与
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Physical properties Density ISO 1183 g / cm3 1.78 1.76 1.78 1.75 1.67–1.69 2.12 – 2.16 2.12 – 2.17 Water absorption (24 h at 23 °C) ISO 62 % < 0.04 < 0.04 < 0.04 < 0.04 < 0.1 < 0.03 < 0.03 Mechanical properties Tensile ASTM D638 Tensile strength at yield MPa 53 – 57 48 35 14 – 35 29 15 15 Tensile strength at break MPa 35 – 50 41 20 – 40 14 – 30 50 > 26 > 21 Elongation at break % 20 – 50 10 200 – 600 350 – 600 260 – 290 > 300 > 275 E-modulus MPa 2,500 1,310 1,050 500 1,670 500 – 600 500 – 600 Creep resistance ASTM D2990 Strain at 200 °C - 1 MPa - 2,000 h % no 3 3 Strain at 200 °C - 1 MPa - 2,000 h % no 8 15 Flexion ASTM D790 Maximum load MPa 78 55 40 18 47 Flexural modulus MPa 2,200 1,517 1,000 425 1,690 500 – 600 500 – 600 IZOD impact notched ASTM D256 J /m 55 161 125 1,000 no break no break no break Shore D hardness ASTM D2240 – 78 78 72 53 75 55 – 60 55 – 60 Abrasion resistance TABER CS17 / 1kg mg / 1,000 revol. 5 –10 5 –10 5 –15 5 –15 7–10 10 – 20 10 – 20 Friction coefficient (dynamic) ASTM D1894 0.2 – 0.3 0.2 0.2 – 0.3 0.2 – 0.3 0.19 0.1 – 0.2 0.1 – 0.2 Thermal properties Crystallinity by DSC ASTM D3418 Melting point °C 174 160 160 169 240 – 245 280 – 290 300 – 310 Fusion heat J / g 67 46 39 26 35 – 45 18 – 26 25 – 35 Cristallyzation temperature °C 140 132 121 128 220 – 225 255 – 265 275 – 285 Cristallization heat J / g 59 46 37 25 35 – 45 18 – 26 25 – 35 Upper service temperature °C 150 140 140 150 150 260 260 VICAT point ISO 306 load 1 kgf °C 171 154 150 110 HDT ASTM D648 load 0.46 MPa (after annealing) °C 148 127 100 49 115 115 120 load 1.8 MPa (after annealing) °C 115 88 52 36 75 50 50 Glass transition DMTA °C –30 –39 –29 –28 85 Brittleness temperature ASTM D746A °C 0 –10 –17 –37 <–76 Thermal stability TGA °C 375 – 400 375 – 400 330 – 370 320 – 340 300 420 – 440 420 – 440 Linear thermal expansion coefficient *10-6 ASTM D696 1 / K 120 –140 120 –130 140 –160 130 –150 80 – 200 120 – 200 120 – 200 thermal conductivity at 23 °C ASTM C177 W/m* K 0.2 0.19 0.19 0.18 0.14 0.15 – 0.25 0.15 – 0.25 Specific heat 0 – 100 °C J / g * K 1.2 –1.6 1.3 1.2 –1.6 1.2 –1.6 0.9 –1.3 0.9 –1.1 0.9 –1.1 Electrical properties Surface resistivity DIN 53482 ohm ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1017 ≥ 1 * 1017 Volume resistivity DIN 53482 ohm* cm ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1014 ≥ 1 * 1017 ≥ 1 * 1017 Fire resistance LOI ASTM D2863 % 44 44 44 – 65 (*) 48 – 65 (*) 52 > 95 > 95 Flame rating UL94 V-0 |
2楼2009-10-28 16:34:48
