SHERP

열경화성 수지의 점도와 유전율 손실인자의 관계
On the Relationship between Viscosity and Dielectric Loss Factor of a Thermoset Resin

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Authors
김홍경; 안규종; 홍종달; 차국헌
Issue Date
1996
Publisher
한국고분자학회 = The Polymer Society of Korea
Citation
Polymer(Korea), 20, 1114 (1996)
Keywords
viscositydielectric loss factorionic conductivityRMSDEA
Abstract
본 연구에서는 열경화성 수지의 경화반응 중의 점도변화를 rheometrics mechanical spectroscopy (RMS)로 측정하였고, dielectric analyzer (DEA)의 결과와 비교하였다. 승온조건에서 수지의 점도는 온도가 올라감에 따라 감소하다가 경화가 진행되면서 급격히 증가하는 전형적인 열경화성 수지의 점도 변화 거동을 보이는 것을 확인하였다. 유전율 손실인자(ε")는 온도가 증가하면서 이온의 모빌리티가 중가함에 따라 커지다가 경화가 진행됨에 따라 서서히 감소하였다. 일반적으로 ε"은 점도에 반비례한다는 것이 알려져 있고, 이러한 관계는 경화가 진행되면 성립하지 않음을 관찰하였다. 본 연구에서는 80℃ 부근에 존재하는 열경화성 수지의 물리적 상변화를 중심으로 ε"과 점도사이의 관계가 변하는 것을 확인하였고, 따라서 물리적 상변화 과정은 이온의 전기전도도의 변화에 의해 결정된다는 것을 알았다. ; The change of complex viscosity measured by rheometrics mechanical spectroscopy (RMS) was compared with dielectric loss factor (ε") change measured by dielectric analyzer (DEA) in a curing reaction of a thermosetting resin. Complex viscosity of the resin initially decreased with increasing temperature and then increased rapidly due to the curing reaction within the resin. ε" initially increased with increasing temperature due to the increase of ionic mobility within the resin and then decreased slowly as the curing reaction progressed. It is generally known that there is a reciprocal relationship between complex viscosity and ionic conductivity or ε", and that this relationship is valid up to the onset of the curing reaction. In present study, it is, however, found that this reciprocal relationship between ε" and complex viscosity is changed at the phase transition around 80℃, which leads to imply that the physical phase transition of the resin before curing is due to the change in ionic conductivity.
ISSN
0379-153X
Language
Korean
URI
http://kiss.kstudy.com/search/detail_view.asp?key=43967

http://www.polymer.or.kr/sub6/sub6_2.php?content=search&seq=7311

http://hdl.handle.net/10371/5903
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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