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Polyisoxazoline 및 Polyisoxazole의 전기적 특성과 그 응용에 관한 연구
Electrical Properties of Polyisoxazoline and Polyisoxazole and Their Applications
HWAHAK KONGHAK, December 1973, 11(6), 404-414(11), NONE
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Abstract
Terephthalohydroxamoyl chloride와 diolefin의 부가-축합중합에 의하여 합성된 결정성 polyisoxazoline 및 polyisoxazole의 전도성과 구조와의 관계를 물성론적 입장에서 검토한바, imide결합 또는 amide 결합을 갖는 polyisoxazoline은 전형 유기반도체임을 알아냈다. 그러나 polyisoxazole（III-A）는 positive thermistor의 특성을 나타냈다. 한편 이들 복소환고분자와 epoxy수지의 복합성형물의 전기적 특성을 검토한 결과, 이들 복합물의 dielectric loss는 매우 적고 또한 저전력의 비교적 낮은 온도영역(25∼90 ℃)에서 감온소자용 저항체로 사용할 수 있다는 것을 알아냈다.
Highly crystalline polyisoxazoline and polyisoxazole were synthesized via addition condensation polymerization by the reactions of terephthalohydroxamoyl chloride （TPHC） with diolefins in a non-polar solvent. And the physical properties of the produced polymers were clarified. The electrical properties of polyisoxazoline, polyisoxazole, and their molding compounds with epoxy resin were investigated on the basis of physical properties of the polymers. The following results were obtained:
（1） Polyisoxazoline (I-A) (ρ28℃=109Ω·㎝), the reaction product of TPHC with m-phenylenedimaleimide, and (II-A) (ρ29℃=105Ω·㎝) from the reaction of TPHC with ethylenebisacrylamide have shown the semiconductive characters.
（2） Polyisoxazole (III-A), the reaction product of TPHC with 1, 4-diethynylbenzene, has shown characteristics of a positive thermistor.
（3） I-A, II-A-, and III-A-Epon 828 molded compounds, cured with ethylenediamine at room temperature, have shown small electrical energy losses.
（4） 10 %-I-A- -II-A- and -III-A-Epon 828 molded compounds were found to be very thermally sensitive resistors in the temperature range of 25-90 ℃. These newly molded compounds from heterocyclic polymers, such as polyisoxazoline and polyisoxazole, were found to have the characteristics of the thermistors.
（1） Polyisoxazoline (I-A) (ρ28℃=109Ω·㎝), the reaction product of TPHC with m-phenylenedimaleimide, and (II-A) (ρ29℃=105Ω·㎝) from the reaction of TPHC with ethylenebisacrylamide have shown the semiconductive characters.
（2） Polyisoxazole (III-A), the reaction product of TPHC with 1, 4-diethynylbenzene, has shown characteristics of a positive thermistor.
（3） I-A, II-A-, and III-A-Epon 828 molded compounds, cured with ethylenediamine at room temperature, have shown small electrical energy losses.
（4） 10 %-I-A- -II-A- and -III-A-Epon 828 molded compounds were found to be very thermally sensitive resistors in the temperature range of 25-90 ℃. These newly molded compounds from heterocyclic polymers, such as polyisoxazoline and polyisoxazole, were found to have the characteristics of the thermistors.
