Ultra-weak light is always emitted when substances undergo chemical reactions such as oxidation – calledchemiluminescence（ CL）. CL measurement enables us to evaluate and estimate oxidation, deterioration, antioxidantefficacy or the degree of aging of samples at their very early stage. The CL measurement is a valuableinvestigative tool applied widely in medical, pharmaceutical, food, biochemical and chemical research. Thedetector for ultra-weak luminescence detects down to 50 photons/ cm2 sec（ about 1/10000 of a firefly） or 10-15 Watts. Most materials are increasingly being stabilized against oxidation. Continued development of highersensitive detection along with the advancement of technology is an important priority.CL assay also enables researchers to capture the weak luminescence resulting from physical impact such asfriction, scraping, or when samples are fracture, and to monitor cavitation, resin and CFRP curing.The detection of very weak light with high sensitivity enables us to capture new information and knowledge.In this Review article, we introduce the basic CL mechanism, the latest data and outline the benefits ofapplying CL analysis as an investigation tool.Key words : Chemiluminescence, Oxidation,

The latent thermal catalytic abilities of imidazoles-intercalated α-zirconium phosphate, imidazole（ α-ZrP·Im）,2-methylimidazole （α-ZrP·2MIm）, and 2-ethyl-4-methylimidazole （α-ZrP·2E4MIm） were examined bythe reaction of pentaerythritol tetra（3-mercaptopropionate（）PETMP） and glycidyl phenyl ether（ GPE）in the presence of α-ZrP·Ims at varying temperatures for 1 h periods. Increasing the temperature to 80℃,the conversion reached less than 10% with α-ZrP·Ims. At 100℃ for 1 h in the presence of α-ZrP·2MIm andα-ZrP·2E4MIm, the conversion reached over 96%. With α-ZrP·Im at 120℃ for 1h, the conversion was 94%. Thethermal stabilities of PETMP and GPE with α-ZrP·Ims at 40℃, the reaction did not proceed for 3 days. At 40℃for 4 days, the conversions were 54% for α-ZrP·2MIm and 66% for α-ZrP·2E4MIm. The order of the stabilitywas α-ZrP·Im>α-ZrP·2MIm≧α-ZrP·2E4MIm. The curing reaction of PETMP and 2,2-bis（4-hydroxyphenyl）propane diglycidyl ether（DGEBA） with α-ZrP·Ims was evaluated by DSC. These catalysts of α-ZrP·Ims couldbe used as latent thermal catalysts in the curing reaction of epoxy-thiol system.

To investigate the adhesion mechanism of pressure-sensitive adhesive（ PSA） by the tackifier addition, thedifference spectrum was measured using 1H pulse nuclear magnetic resonance（ pulse NMR） for the blend ofacrylic triblock copolymer consisting of poly（methyl methacrylate）（ PMMA） block and poly（n-butyl acrylate）（PBA） block and special rosin ester tackifier（ RE）. The pulse NMR was measured for base polymer and REseparately. The combined spectrum was prepared by the addition of both signals based on the mixing ratio.The pulse NMR of the blend was measured as the measured spectrum. The difference spectrum was madeby the deduction of the combined spectrum from the measured spectrum. The three peaks based on RE, therelatively harder PBA and the relatively softer PBA were appeared. The height of them were dependent on theRE content and molecular weight. RE exists in the base polymer as the miscible state or as the agglomeratedparticles in PBA. These three peaks indicated that the degree of formation of the agglomerated particles andthe restriction of molecule mobility of PBA. The analysis for the styrenic block copolymer/tackifier systemwas also conducted by the same method. The result of difference spectrum was found to be useful for thediscussion of the adhesion properties.