放射線으로 照射된 Polyvinylchloride의 耐放射性 電氣傳導度에 可塑劑가 미치는 影響 = Effects of Plasticizer to Radioresistance and Electrical Conductivity of Irradiated Polyvinylchlorde

국문 초록 (Abstract)

有機錫系 安定劑를 포함하고 있는 polyvinylchloride(PVC)의 耐放射性은 可塑劑로서 첨가된 dioctylphthalate(DOP)의 양의 증가와 더부러 증가하며 이와 같은 耐放射性의 평가는 시료의 IR 특성상에서 안정제의 解離에 起因하고 있는 1,540∼1,640cm-1에서의 흡수대가 선량과 더부러 변화하는 거동으로 살필 수 있다.
가소화된 PVC에서의 내방사성의 증가는 DOP 분자구조의 일부를 형성하는 benzen 環에서 방사 에너지가 공명흡수 되기 때문이라 思料되며 이와 같은 見解는 방사선량에 대한 導電率變化特性의 고찰 결과와도 잘 일치한다.
實用的面에서 0∼100Mrad 사이의 선량에 대한 充分한 耐放射性을 얻기 위하여는 30phr 전후의 DOP 첨가량이 필요하다.

다국어 초록 (Multilingual Abstract)

In order to investigate corelation between contents of dioctylphthalate polyvinylchloride blent dibutyl tin dilaulate with dibutyl tin maleate as stabilizer and the behaviors of radiation resistance as well as electrical conductivity on irradiated specimens, several observations were carried out.
A characteristic peak observed in the range of 1,540-1,640cm-1 on infrared spectra shows such a sensitive response to radiation as the intensity decreases with increasing doses and that this tendency strongly depressed in the presence of plasticizer.
It is seemingly attributed for origin of the peak to the existence of RCOO-jon resulting from dissociation of stabilizere, further the depressive effect of decreasing peak intensity influenced by radiation seems to be caused by resonance absorption in benzen ring being a consistituent of plasticizer.
It is also suggestive to be use the peak behavior influenced by radiation as a criterion for the evaluation of radiation resistance of PVC.
Further the results obtained from electrical conductivity measurement also exhibit reasonable characteristics explainable with views used for the interpretation of the peak behavior mentioned previousely.