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3,4’-二胺基二苯醚(3,4’-ODA),4,4’-(六氟异丙基)-苯二酸酐(6FDA)和分散红1(DR1)合成了有机聚合物聚酰亚胺;采用示差扫描量(DSC)、热失重分析(TGA)对该聚酰亚胺的热稳定性进行了表征。示差扫描量热和热失重分析结果显示,该聚酰亚胺的玻璃化转变温度(Tg)为211℃,在5%的热失重温度为296℃,表明具有非常好的热稳定性。测定了材料在复合光和546nm 单波长光照射下的折射率(n)和热光系数(dn/dT);通过热光系数的测量,计算了聚合物的介电常数(ε)、介电热光系数(dε/dT)、体积热膨胀系数β和(dβ/dT)值。本实验制得的聚合物材料在复合光下的热光系数(dn/dT)值为-1.607 1～-2.564 3×10~(-4)℃~(-1),体积热膨胀系数变化率(dβ/dT)为1.27～3.11×10~(-7)K~(-1);在546 nm 单波长光照射下的热光系数(dn/dT)值为-3.314 3×10~(-4)℃~(-1),体积热膨胀系数变化率(dβ/dT)为5.45×10~(-7)K~(-1),表明该聚合物在低驱动功率的新型数字热光开关、光通信器件等领域具有潜在的应用前景。
Organic Synthesis of 3,4’-Diaminodiphenylether (3,4’-ODA), 4,4 ’- (Hexafluoroisopropyl) -phthalic Anhydride (6FDA) and Disperse Red 1 (DR1) Polyimide; The thermal stability of this polyimide was characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Differential scanning calorimetry and thermogravimetric analysis revealed that the polyimide had a glass transition temperature (Tg) of 211 ° C and a 5% weight loss temperature of 296 ° C, indicating very good thermal stability. The refractive index (n) and the thermo-optic coefficient (dn / dT) of the material under complex light and single-wavelength light irradiation at 546 nm were measured. The thermal permittivity (ε), the dielectric constant (Dε / dT), volumetric thermal expansion coefficient β and (dβ / dT) values. The thermo-optic coefficient (dn / dT) of the polymer obtained in this experiment was -1.607 1 ~ -2.564 3 × 10 -4 ℃ -1, the rate of change of volumetric thermal expansion coefficient was (dn / dT) was 1.27 ~ 3.11 × 10 ~ (-7) K ~ (-1) .The thermal coefficient (dn / dT) of single wavelength light at 546 nm was -3.314 3 × 10 ~ (-4) ) ℃ ~ (-1), the rate of change of volumetric thermal expansion coefficient (dβ / dT) was 5.45 × 10 ~ (-7) K ~ (-1) Communication devices and other fields have potential applications.