Scholars' Mine
Missouri S&T
Research Repository
Curtis Laws Wilson Library
400 W. 14th Street
Rolla, MO 65409-0060
scholarsmine@mst.edu
| Title: | Dynamics of PIPA-d₇ on silica surface | |
| Alternate Title: | Dynamics of PIPA-d7 on silica surface | |
| Author (s): | Krisanangkura, Piyawan Blum, Frank D. | |
| Department/Lab Affiliations: | Chemistry Materials Research Center Materials Science & Engineering | |
| Keywords: | calorimetry deuterium solid-state NMR glass transition temperature nuclear magnetic resonance poly(methyl acrylate)-d3 polydispersity poly(isopropyl acrylate)-d7 polymer chains polymeric materials | |
| Issue Date: | 2008 | |
| Publisher: | American Chemical Society PREPRINTS | |
| Citation: | P. Krisanangkura, F. D. Blum. Dynamics of PIPA-d7 on Silica Surface, Polymer Preprints Vol. 49(1) , 2008 pp. 668-669 | |
| Abstract: | Molecular motion of polymer chains is an important determinant in understanding the physical properties of polymeric materials. Glass transition temperature (Tg) is a physical property of polymers, which is of primary interest. The study of the dynamics of polymer segments assists in understanding the dependence of Tg on polymer structure.1 For decades, studies have addressed the molecular motion in various polymers. Some of them have probed the dynamics of polymer backbones.2,3 The properties of a polymer at an interface may change because of the type of polymer, the substrate, or other variables. The side chain of a polymer can also play an important role in terms of the interaction between a polymer and a substrate at an interface.4 The strength of the surface-segment interaction affects the mobility of polymer-chain segments. Several techniques have been used to investigate the effects, including modulated differential scanning calorimetry (MDSC)5,6 and nuclear magnetic resonance (NMR).2,3,7,8 In this work, relatively narrow polydispersity poly(isopropyl acrylate)-d7 (PIPA-d7) has been selected for study. The large and bulky group on the PIPA side-chain, would provide a different probe for segmental mobility than that of previously studied poly(methyl acrylate)-d3 (PMA-d3).9-11 The PIPA sidechain contains two methyl groups, branched at a methane carbon atom. Additionally, when different amounts of polymers are deposited on a surface, individual unique behaviors become evident that are different from the behavior of bulk polymers. Deuterium solid-state NMR was used to characterize the polymer segmental motions in both bulk deuterium-labeled PIPA and polymer thin films on silica. The 2H quadrupole-echo NMR spectra were collected as a function of temperature. The interpretation of those spectra can provide valuable information on the molecular motion and the physical properties of the polymer including glass transition temperatures. Calorimetry, the most widely accepted technique for measuring the glass transition temperature (Tg), was also performed for comparison. This work is an update of that previously presented.12 | |
| 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: | |
| Publisher URL: | ||
| Link to this page: | ||
| Full Text: |
|
| title | Dynamics of PIPA-d₇ on silica surface | |
| title.alternative | Dynamics of PIPA-d7 on silica surface | |
| contributor.author | Krisanangkura, Piyawan | |
| contributor.author | Blum, Frank D. | |
| contributor.deptlab | Chemistry | |
| contributor.deptlab | Materials Research Center | |
| contributor.deptlab | Materials Science & Engineering | |
| contributor.sponsor | National Science Foundation | |
| subject | calorimetry | |
| subject | deuterium solid-state NMR | |
| subject | glass transition temperature | |
| subject | nuclear magnetic resonance | |
| subject | poly(methyl acrylate)-d3 | |
| subject | polydispersity poly(isopropyl acrylate)-d7 | |
| subject | polymer chains | |
| subject | polymeric materials | |
| date.issued | 2008 | |
| publisher | American Chemical Society PREPRINTS | |
| identifier.citation | P. Krisanangkura, F. D. Blum. Dynamics of PIPA-d7 on Silica Surface, Polymer Preprints Vol. 49(1) , 2008 pp. 668-669 | |
| identifier.pub.URI | ||
| description.abstract | Molecular motion of polymer chains is an important determinant in understanding the physical properties of polymeric materials. Glass transition temperature (Tg) is a physical property of polymers, which is of primary interest. The study of the dynamics of polymer segments assists in understanding the dependence of Tg on polymer structure.1 For decades, studies have addressed the molecular motion in various polymers. Some of them have probed the dynamics of polymer backbones.2,3 The properties of a polymer at an interface may change because of the type of polymer, the substrate, or other variables. The side chain of a polymer can also play an important role in terms of the interaction between a polymer and a substrate at an interface.4 The strength of the surface-segment interaction affects the mobility of polymer-chain segments. Several techniques have been used to investigate the effects, including modulated differential scanning calorimetry (MDSC)5,6 and nuclear magnetic resonance (NMR).2,3,7,8 In this work, relatively narrow polydispersity poly(isopropyl acrylate)-d7 (PIPA-d7) has been selected for study. The large and bulky group on the PIPA side-chain, would provide a different probe for segmental mobility than that of previously studied poly(methyl acrylate)-d3 (PMA-d3).9-11 The PIPA sidechain contains two methyl groups, branched at a methane carbon atom. Additionally, when different amounts of polymers are deposited on a surface, individual unique behaviors become evident that are different from the behavior of bulk polymers. Deuterium solid-state NMR was used to characterize the polymer segmental motions in both bulk deuterium-labeled PIPA and polymer thin films on silica. The 2H quadrupole-echo NMR spectra were collected as a function of temperature. The interpretation of those spectra can provide valuable information on the molecular motion and the physical properties of the polymer including glass transition temperatures. Calorimetry, the most widely accepted technique for measuring the glass transition temperature (Tg), was also performed for comparison. This work is an update of that previously presented.12 | |
| 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 | 2008-08-13T19:06:11Z | |
| date.available | 2008-06-20T17:10:08Z | |
| identifier.persist.URI | ||
| Full Text |
|