ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"Dark" Initiation of the Photosensitized Degradation of a Styrene-Methyl Isopropenyl Ketone Copolymer by Thermally Generated Acetone TripletsJ. E. Guillet, B. Houvenaghel-Defoort, T. Kilp, N. J. Turro, H.-C. Steinmetzer, and G. SchusterCite this: Macromolecules 1974, 7, 6, 942–946Publication Date (Print):November 1, 1974Publication History Published online1 May 2002Published inissue 1 November 1974https://pubs.acs.org/doi/10.1021/ma60042a047https://doi.org/10.1021/ma60042a047research-articleACS PublicationsRequest reuse permissionsArticle Views34Altmetric-Citations8LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoprocesses in copolymers of methacrylophenone with methyl methacrylate: photodegradation and intramolecular energy migrationToomas Kilp, James E. Guillet, and J. C. GalinCite this: Macromolecules 1982, 15, 4, 980–985Publication Date (Print):July 1, 1982Publication History Published online1 May 2002Published inissue 1 July 1982https://pubs.acs.org/doi/10.1021/ma00232a007https://doi.org/10.1021/ma00232a007research-articleACS PublicationsRequest reuse permissionsArticle Views35Altmetric-Citations4LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Abstract The synthesis of a number of ring‐substituted phenyl isopropenyl ketones and their polymerization with styrene is reported. The ultraviolet absorption spectra of the polymers are analogous to those of ring‐substituted acetophenones and valerophenones. The quantum yields of the Norrish type II photoreaction were estimated in 1,2‐dichloroethane solution at 364 nm by automatic viscometry. These quantum yields are comparable to those of substituted butyrophenones and valerophenones, in that relatively high quantum yields were obtained for the unsubstituted and p ‐chloro‐substituted compounds with low yields for p ‐amino and p ‐hydroxy compounds. The p ‐nitro‐substituted compound gives no type II reaction, presumably because the excitation becomes localized on the nitro groups which photolyzes by a mechanism which does not involve chain scission. The implications of these studies on possible applications to photoimaging are discussed.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTriplet energy migration in poly (acrylophenone): dependence on polymeric tacticityT. Kilp and J. E. GuilletCite this: Macromolecules 1981, 14, 6, 1680–1688Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://pubs.acs.org/doi/10.1021/ma50007a013https://doi.org/10.1021/ma50007a013research-articleACS PublicationsRequest reuse permissionsArticle Views58Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymeric photosensitizers: effects of intramolecular energy migration on sensitization efficienciesEric H. Urruti and Toomas KilpCite this: Macromolecules 1984, 17, 1, 50–54Publication Date (Print):January 1, 1984Publication History Published online1 May 2002Published inissue 1 January 1984https://pubs.acs.org/doi/10.1021/ma00131a009https://doi.org/10.1021/ma00131a009research-articleACS PublicationsRequest reuse permissionsArticle Views53Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Rapid Procedure for the Determination of Viscosity-Molecular Weight RelationsT. Kilp and J. E. GuilletCite this: Macromolecules 1977, 10, 1, 90–94Publication Date (Print):January 1, 1977Publication History Published online1 May 2002Published inissue 1 January 1977https://pubs.acs.org/doi/10.1021/ma60055a019https://doi.org/10.1021/ma60055a019research-articleACS PublicationsRequest reuse permissionsArticle Views525Altmetric-Citations19LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry of ketone polymers. 15. Studies of the photochemistry of isotactic and atactic poly(acrylophenones)T. Kilp, James E. Guillet, L. Merle-Aubry, and Y. MerleCite this: Macromolecules 1982, 15, 1, 60–63Publication Date (Print):January 1, 1982Publication History Published online1 May 2002Published inissue 1 January 1982https://pubs.acs.org/doi/10.1021/ma00229a011https://doi.org/10.1021/ma00229a011research-articleACS PublicationsRequest reuse permissionsArticle Views43Altmetric-Citations6LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
An automatic viscometer and sampling system suitable for monitoring changes in the molecular weight of polymers in solution is described. Automation provides significant increases in precision and accuracy. The instrument can be used to follow degradation or polymerization reactions induced by radiation, heat, or chemical reaction. Examples are given of its application to the study of photolytic and chemical degradation of polymers.
