论文部分内容阅读
北京化工大学选用聚四氢呋喃醚二醇、聚环氧丙烷醚多元醇、聚己二酸乙二醇酯和二苯基甲烷二异氰酸酯等为主要原料,成功制备出一种高强度低内耗的聚氨酯灌封胶。该灌封胶具有粘接性能好(拉伸强度56 MPa,断裂伸长率581%,撕裂强度120 kN/cm)、电绝缘性能优(体积电阻4.8×1013Ω.cm)、内耗峰高(tanδ=0.22)、可室温固化、抗冲击性能强、耐磨蚀性能佳、耐低温性和高弹性好等诸多优点,可广泛用于高频振动时的电子元器件密封,
Beijing Polytechnic University, polyether ether selected polyether glycols, polyoxypropylene ether polyols, polyethylene adipate and diphenylmethane diisocyanate as the main raw material, successfully prepared a high strength and low internal friction polyurethane irrigation Plastic closures. The potting adhesive has good adhesive properties (tensile strength 56 MPa, elongation at break 581%, tear strength 120 kN / cm), excellent electrical insulation properties (volume resistivity 4.8 × 1013Ω.cm), internal friction peak height tanδ = 0.22), can be cured at room temperature, impact resistance, good abrasion resistance, low temperature resistance and high elasticity and many other advantages, can be widely used in high-frequency vibration of electronic components sealed,