Abstract : Dicyanate ester resins have a strong fluorescence and phosphorescence emission. In this work, we report fluorescence and UV spectroscopic characterization of triazine compounds, and identify that the strong fluorescence emission comes from substituted triazine rings which are formed during the cure reaction of polycyanate resins. A series of model compounds were investigated. The results show that substituted triazine rings have similar fluorescence emission to triazine vapor. The emission at 350nm corresponds to sharp emission (335nm) in triazine vapor, and that at 420nm to broad emission (395nm). The large aromatic substituent enhances broad emission which corresponds to the singlet-triplet coupling, and solvation decreases it. When samples are photo or thermally excited, the coupling states start to interact with environment and split to the original states. The split depends on excitation time, concentration and polarity of media.
{"title":"Photophysics of Polycyanate Resin and Triazine Compounds.","authors":"Y. Xu, C. Sung","doi":"10.21236/ada327097","DOIUrl":"https://doi.org/10.21236/ada327097","url":null,"abstract":"Abstract : Dicyanate ester resins have a strong fluorescence and phosphorescence emission. In this work, we report fluorescence and UV spectroscopic characterization of triazine compounds, and identify that the strong fluorescence emission comes from substituted triazine rings which are formed during the cure reaction of polycyanate resins. A series of model compounds were investigated. The results show that substituted triazine rings have similar fluorescence emission to triazine vapor. The emission at 350nm corresponds to sharp emission (335nm) in triazine vapor, and that at 420nm to broad emission (395nm). The large aromatic substituent enhances broad emission which corresponds to the singlet-triplet coupling, and solvation decreases it. When samples are photo or thermally excited, the coupling states start to interact with environment and split to the original states. The split depends on excitation time, concentration and polarity of media.","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"63 1","pages":"208-209"},"PeriodicalIF":0.0,"publicationDate":"1997-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78206677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-04-01DOI: 10.1021/bk-1998-0685.ch021
G. Moad, A. Anderson, F. Ercole, Charles H. J. Johnson, J. Krstina, C. L. Moad, E. Rizzardo, T. Spurling, S. Thang
{"title":"Controlled-growth free-radical polymerization of methacrylate esters: reversible chain transfer versus reversible termination","authors":"G. Moad, A. Anderson, F. Ercole, Charles H. J. Johnson, J. Krstina, C. L. Moad, E. Rizzardo, T. Spurling, S. Thang","doi":"10.1021/bk-1998-0685.ch021","DOIUrl":"https://doi.org/10.1021/bk-1998-0685.ch021","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"111 1","pages":"744-745"},"PeriodicalIF":0.0,"publicationDate":"1997-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72782344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Haddad, R. Stapleton, H. Jeon, P. Mather, J. Lichtenhan
Abstract : The design of new materials with enhanced properties continues to be a driver for the investigation of hybrid inorganic/organic polymers. As hybrid materials are copolymers based on inorganic and organic comonomers, they display enhanced properties by bridging the property space between two dissimilar types of compounds. A typical hybrid material will contain a crosslinked inorganic phase bound (often covalently) with an organic phase. Depending on the relative amounts of the two components, the properties of the resulting hybrid are intermediate between those of an inorganic and an organic polymer. Such methodology%' can be used to create either plastic inorganics or toughened plastics, and is superior to traditional blending methods. However, because such materials are crosslinked networks, they are difficult to study and control at the molecular level and are also difficult to process.
{"title":"Nanostructured Hybrid Organic/Inorganic Materials, Silsesquioxane Modified Plastics","authors":"T. Haddad, R. Stapleton, H. Jeon, P. Mather, J. Lichtenhan","doi":"10.21236/ada409298","DOIUrl":"https://doi.org/10.21236/ada409298","url":null,"abstract":"Abstract : The design of new materials with enhanced properties continues to be a driver for the investigation of hybrid inorganic/organic polymers. As hybrid materials are copolymers based on inorganic and organic comonomers, they display enhanced properties by bridging the property space between two dissimilar types of compounds. A typical hybrid material will contain a crosslinked inorganic phase bound (often covalently) with an organic phase. Depending on the relative amounts of the two components, the properties of the resulting hybrid are intermediate between those of an inorganic and an organic polymer. Such methodology%' can be used to create either plastic inorganics or toughened plastics, and is superior to traditional blending methods. However, because such materials are crosslinked networks, they are difficult to study and control at the molecular level and are also difficult to process.","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"2 1","pages":"496-497"},"PeriodicalIF":0.0,"publicationDate":"1996-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89451653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1994-01-01DOI: 10.1021/BK-1994-0548.CH016
H. Dautzenberg, G. Rother, J. Hartmann
{"title":"Light scattering studies of polyelectrolyte complex formation - Effect of polymer concentration","authors":"H. Dautzenberg, G. Rother, J. Hartmann","doi":"10.1021/BK-1994-0548.CH016","DOIUrl":"https://doi.org/10.1021/BK-1994-0548.CH016","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"160 1","pages":"210-224"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76981443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1990-01-01DOI: 10.1021/bk-1991-0475.ch010
Garrett R.Wayne, J. David, T. Tri, A. Karen, H. James, M. C. P. Senake, J. P. Peter
The changes in the properties of polymer materials which occur when they are subjected to high-energy radiation, e.g. electron beams and gamma rays, are a result of chemical reactions initiated in the polymer molecules by absorption of radiation energy. There is increasing interest in the utilization of polymer materials in radiation environments where the temperature may be less than -270°C or above 500°C, as in aerospace applications or particle accelerators. The effect of temperature on the radiation chemistry of polymers has not been studied extensively. In this paper, we report the temperature dependence of scission, crosslinking, formation of small molecules and depropagation in the radiation chemistry of polymers.
{"title":"Temperature dependence of radiation chemistry of polymers","authors":"Garrett R.Wayne, J. David, T. Tri, A. Karen, H. James, M. C. P. Senake, J. P. Peter","doi":"10.1021/bk-1991-0475.ch010","DOIUrl":"https://doi.org/10.1021/bk-1991-0475.ch010","url":null,"abstract":"The changes in the properties of polymer materials which occur when they are subjected to high-energy radiation, e.g. electron beams and gamma rays, are a result of chemical reactions initiated in the polymer molecules by absorption of radiation energy. There is increasing interest in the utilization of polymer materials in radiation environments where the temperature may be less than -270°C or above 500°C, as in aerospace applications or particle accelerators. The effect of temperature on the radiation chemistry of polymers has not been studied extensively. In this paper, we report the temperature dependence of scission, crosslinking, formation of small molecules and depropagation in the radiation chemistry of polymers.","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"38 1","pages":"333-334"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76343491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-09-01DOI: 10.1021/bk-1987-0358.ch012
R. Hayashi, S. Tazuke, C. Frank
{"title":"BEHAVIOR OF A TWISTED INTRAMOLECULAR CHARGE TRANSFER COMPOUND BONDED TO POLY(METHYL METHACRYLATE).","authors":"R. Hayashi, S. Tazuke, C. Frank","doi":"10.1021/bk-1987-0358.ch012","DOIUrl":"https://doi.org/10.1021/bk-1987-0358.ch012","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"4 1","pages":"304-305"},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85494365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1984-12-01DOI: 10.1021/bk-1984-0266.ch005
Y. Tabata, S. Tagawa, M. Washio
{"title":"PULSE RADIOLYSIS STUDIES ON THE MECHANISM OF THE HIGH SENSITIVITY OF CHLOROMETHYLATED POLYSTYRENE AS AN ELECTRON NEGATIVE RESIST.","authors":"Y. Tabata, S. Tagawa, M. Washio","doi":"10.1021/bk-1984-0266.ch005","DOIUrl":"https://doi.org/10.1021/bk-1984-0266.ch005","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"1 1","pages":"151-163"},"PeriodicalIF":0.0,"publicationDate":"1984-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76482832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1984-01-01DOI: 10.1007/978-1-4684-4619-7_7
M. Litt, J. Rodríguez, H. Nava, JinBaek Kim, T. Mcclelland, W. Gordon, M. Dyan
{"title":"Poly (N-Acyl Ethyleneimines) with Polarizable Aromatic Side Chain Substituents and Their Complexes: Synthesis, Structure and Electronic Properties","authors":"M. Litt, J. Rodríguez, H. Nava, JinBaek Kim, T. Mcclelland, W. Gordon, M. Dyan","doi":"10.1007/978-1-4684-4619-7_7","DOIUrl":"https://doi.org/10.1007/978-1-4684-4619-7_7","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"10 1","pages":"113-131"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87115669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1978-01-01DOI: 10.1021/bk-1979-0095.ch017
J. FarrisR, D. TsaiY
{"title":"The influence of vacuole formation and growth on the mechanical behavior of polymers.","authors":"J. FarrisR, D. TsaiY","doi":"10.1021/bk-1979-0095.ch017","DOIUrl":"https://doi.org/10.1021/bk-1979-0095.ch017","url":null,"abstract":"","PeriodicalId":7648,"journal":{"name":"American Chemical Society, Polymer Preprints, Division of Polymer Chemistry","volume":"10 1","pages":"816-820"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82887230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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