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| Title: | Glass transition behavior of poly(methyl acrylate) end-grafted by ATRP to amorphous silica | |
| Author (s): | Nair, Manikantan B. Blum, Frank D. | |
| Department/Lab Affiliations: | Chemistry Materials Research Center Materials Science & Engineering | |
| Keywords: | PMA chains glass transition temperature modulated differential scanning calorimetry (MDSC) silane coupling agent solid substrates supported polymer films | |
| Issue Date: | 2008 | |
| Publisher: | American Chemical Society PREPRINTS | |
| Citation: | M. B. Nair, F. D. Blum. Glass Transition Behavior of Poly(methyl acrylate) End-Grafted by ATRP to Amorphous Silica, Polymer Preprints Vol. 49(1) , pp. 485, 2008. | |
| Abstract: | Ultra-thin polymer films attached to solid substrates (supported films) have attracted significant interest in recent years. Supported films are used in the design of advanced materials like photoresists, lubricants and other electronic devices. Glass transition temperatures (Tgs) of supported polymer films have also been of significant interest. The Tg has been shown to depend on the thickness of the polymer film on the surface and the inherent nature of the surface. The effect of end-grafting of a polymer chain to a surface, on the Tg of the polymer has been studied previously.1 Reports on the study of glass transition behaviors of different types of supported polymer films on substrates of a varying nature exist. These studies include investigations of the dependence of Tg on various parameters like film thickness, nature of the substrate, molecular architecture, stereochemistry of the polymer and interfacial interaction effects.10-15 In this preprint, we report the study of the Tg behavior of poly(methyl acrylate) (PMA) chains covalently bonded to silica using a silane coupling agent. Several PMA-silica composite samples with different relative amounts (low, medium and high) of PMA attached to the silica were synthesized and the Tg of the attached PMA in each composite was determined using modulated differential scanning calorimetry (MDSC). The attached PMA, in the composite samples, exhibited interesting glass-transition behavior. | |
| Type: | Article - Journal text | |
| In Title: | Polymer Preprints | |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Author(s) retain copyright. With author permission, full text may be uploaded FULL COPYRIGHT INFORMATION: | |
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| title | Glass transition behavior of poly(methyl acrylate) end-grafted by ATRP to amorphous silica | |
| contributor.author | Nair, Manikantan B. | |
| contributor.author | Blum, Frank D. | |
| contributor.deptlab | Chemistry | |
| contributor.deptlab | Materials Research Center | |
| contributor.deptlab | Materials Science & Engineering | |
| contributor.sponsor | National Science Foundation | |
| subject | PMA chains | |
| subject | glass transition temperature | |
| subject | modulated differential scanning calorimetry (MDSC) | |
| subject | silane coupling agent | |
| subject | solid substrates | |
| subject | supported polymer films | |
| date.issued | 2008 | |
| publisher | American Chemical Society PREPRINTS | |
| identifier.citation | M. B. Nair, F. D. Blum. Glass Transition Behavior of Poly(methyl acrylate) End-Grafted by ATRP to Amorphous Silica, Polymer Preprints Vol. 49(1) , pp. 485, 2008. | |
| identifier.pub.URI | ||
| description.abstract | Ultra-thin polymer films attached to solid substrates (supported films) have attracted significant interest in recent years. Supported films are used in the design of advanced materials like photoresists, lubricants and other electronic devices. Glass transition temperatures (Tgs) of supported polymer films have also been of significant interest. The Tg has been shown to depend on the thickness of the polymer film on the surface and the inherent nature of the surface. The effect of end-grafting of a polymer chain to a surface, on the Tg of the polymer has been studied previously.1 Reports on the study of glass transition behaviors of different types of supported polymer films on substrates of a varying nature exist. These studies include investigations of the dependence of Tg on various parameters like film thickness, nature of the substrate, molecular architecture, stereochemistry of the polymer and interfacial interaction effects.10-15 In this preprint, we report the study of the Tg behavior of poly(methyl acrylate) (PMA) chains covalently bonded to silica using a silane coupling agent. Several PMA-silica composite samples with different relative amounts (low, medium and high) of PMA attached to the silica were synthesized and the Tg of the attached PMA in each composite was determined using modulated differential scanning calorimetry (MDSC). The attached PMA, in the composite samples, exhibited interesting glass-transition behavior. | |
| type | Article - Journal | |
| type.DCMIType | text | |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. | |
| rights | Author(s) retain copyright. With author permission, full text may be uploaded | |
| rights.URI | ||
| relation.isPartOf | Polymer Preprints | |
| date.accessioned | 2008-08-13T19:18:32Z | |
| date.available | 2008-06-20T17:01:16Z | |
| identifier.persist.URI | ||
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