Abstract |
합성한 pllyglyceryl phthalate, bisphenol A-epichlorohydrin 축중합물과 polyvinyl alcohol의 naphthoquinone-1,2-diazide-5-sulfonyl esters(PGND, BEND 및 PVAND)의 감광특성을 지배하는 제인자를 이들에 대한 광조사전후의 용해도 차이에 의하여 검토하였다. 유리 또는 석영지지박판상에 도포한 각시료를 각종조건하에서 노광하고 알카리 수용액에 침지시킨 다음 도포된 필림의 잔막수율(W/W0)을 개선하였다. 필름의 감광도와 직접적인 관계가 있는 잔막효율은 모체수지의 중합도, 증감제의 종류 및 첨가농도에 따라 영향이 있었다. 모체수지의 중합도가 크면 클수록 감광성이 더 우수하였으며, 증감제의 첨가농도는 5%일때가 가장 좋은 효과를 나타내었다. PGND, BEND 및 PVAND에 대해 본실험에서 사용한 각종 증감제 중에서 가장 효과적인 것은 benzanthrone, 5-nitroacenaphthene, picramide이였다. 이들 수지와 증감제를 첨가한 경우의 고상에 있어서의 자외선흡수스펙트럼과 감색성 사진을 각각 비교 검토하여 그 증감과 분광감도적 특성을 규명하였다. PGND, BEND 및 PVAND는 사용한 증감제에 의하여 광학증감하였으며 증감효과가 현저한 것일수록 그 감광파장성이 장파장쪽으로 신장하였다. 미증감, 증감시료에 있어서 분광흡수 극대 파장성과 분광감광극대파장성이 거의 일치하고 있는 점으로 보아 시료 수지들에 의해서 흡수된 파장성의 광은 그 분야에 유효하게 사용되고 있음을 확인하였다. Photosensitive properties of naphthoquinone-1,2-diazide-5-sulfonyl esters (PGND, BEND and PVAND) of polyglyceryl phthalate(PG), bisphenol A-epichlorohydrin condensate(BE) and polyvinyl alcohol(PVA) were investigated by the change of solubility before and after exposing to light. Various samples coated on glass or quartz plates were exposed to light under various conditions and steeped in aqueous alkali solution, and then the yield of residual film(W/W0) was determined. The yield of residual film, which was closely related to the sensitivity of the film, was affected by the degree of polymerization of the backbone resin, sensitizers and their concentration. In polymer homologs, the sensitivity was dependent on the degree of polymerization(the higher, the better). And also, it was most effective when 5 % of sensitizers to esters was used. The minimum exposed time was 0.6 min. for PGND-1, 1.0 min. for BEND-1, and 3.0 min. for PVAND-1. Most effective sensitizers for PGND, BEND and PVAND among those used here were benzanthrone, 5-nitroacenaphthene and picramide, respectively. The spectral sensitivities of PGND, BEND and PVAND were examined by comparing their spectrograms with UV-spectra in a solid state. Also, the sensitization and spectral sensitivity of the above polymers were studied. All the polymers containing the sensitizers showed optical sensitization. From the fact that in either case of sensitized or unsensitized sample, the ranges of absorption-maximum wave length were almost consistent with sensitivity maximum wave length, it was proved that the light absorbed by a sample served efficiently for photochemical reactions. Benzanthrone was found to be an excellent sensitizer for PGND. |
