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Wang M, Wang Y, Luo P, Zhang H, Zhang M, Hu P. Simultaneous determination of the styrene unit content and assessment of molecular weight of triblock copolymers in adhesives by a size exclusion chromatography method. J Sep Sci 2017; 40:3987-3995. [PMID: 28795490 DOI: 10.1002/jssc.201700306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 08/01/2017] [Accepted: 08/02/2017] [Indexed: 11/08/2022]
Abstract
The content of styrene units in nonhydrogenated and hydrogenated styrene-butadiene-styrene and styrene-isoprene-styrene triblock copolymers significantly influences product performance. A size exclusion chromatography method was developed to determine the average styrene content of triblock copolymers blended with tackifier in adhesives. A complete separation of the triblock copolymer from the other additives was realized with size exclusion chromatography. The peak area ratio of the UV and refraction index signals of the copolymers at the same effective elution volume was correlated to the average styrene unit content using nuclear magnetic resonance spectroscopy with commercial copolymers as standards. The obtained calibration curves showed good linearity for both the hydrogenated and nonhydrogenated styrene-butadiene-styrene and styrene-isoprene-styrene triblock copolymers (r = 0.974 for styrene contents of 19.3-46.3% for nonhydrogenated ones and r = 0.970 for the styrene contents of 23-58.2% for hydrogenated ones). For copolymer blends, the developed method provided more accurate average styrene unit contents than nuclear magnetic resonance spectroscopy provided. These results were validated using two known copolymer blends consisting of either styrene-isoprene-styrene or hydrogenated styrene-butadiene-styrene and a hydrocarbon tackifying resin as well as an unknown adhesive with styrene-butadiene-styrene and an aromatic tackifying resin. The methodology can be readily applied to styrene-containing polymers in blends such as poly(acrylonitrile-butadiene styrene).
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Affiliation(s)
- Mingfang Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Yuerong Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Pei Luo
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa, Macau, China
| | - Hongyang Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Min Zhang
- Shanghai Key Laboratory of New Drug Design & Modern Engineering Center for TCM, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Ping Hu
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, China
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Thevarajah JJ, Bulanadi JC, Wagner M, Gaborieau M, Castignolles P. Towards a less biased dissolution of chitosan. Anal Chim Acta 2016; 935:258-68. [DOI: 10.1016/j.aca.2016.06.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/17/2016] [Accepted: 06/19/2016] [Indexed: 10/21/2022]
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Antonioli D, Sparnacci K, Laus M, Ferrarese Lupi F, Giammaria TJ, Seguini G, Ceresoli M, Perego M, Gianotti V. Composition of ultrathin binary polymer brushes by thermogravimetry-gas chromatography-mass spectrometry. Anal Bioanal Chem 2016; 408:3155-63. [PMID: 26873220 DOI: 10.1007/s00216-016-9380-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/19/2016] [Accepted: 01/29/2016] [Indexed: 10/22/2022]
Abstract
In the present paper, a reliable and rugged thermogravimetry-gas chromatography-mass spectrometry (TGA-GC-MS) method was developed to determine the composition of ultrathin films consisting of binary blends of functional polystyrene (PS) and polymethylmethacrylate (PMMA) grafted to a silicon wafer. A general methodology will be given to address the composition determination problem for binary or even multicomponent polymer brush systems using the PS/PMMA-based samples as a paradigmatic example. In this respect, several distinct tailor-made materials were developed to ensure reliable calibration and validation stages. The analytical method was tested on unknown samples to follow the composition evolution in PS/PMMA brushes during the grafting reaction. A preferential grafting of the PMMA was revealed in full agreement with its preferential interaction with the SiO2 polar surface.
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Affiliation(s)
- Diego Antonioli
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Università del Piemonte Orientale "A. Avogadro", INSTM, UdR Alessandria, Viale T. Michel 11, 15121, Alessandria, Italy
| | - Katia Sparnacci
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Università del Piemonte Orientale "A. Avogadro", INSTM, UdR Alessandria, Viale T. Michel 11, 15121, Alessandria, Italy
| | - Michele Laus
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Università del Piemonte Orientale "A. Avogadro", INSTM, UdR Alessandria, Viale T. Michel 11, 15121, Alessandria, Italy
| | | | - Tommaso Jacopo Giammaria
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Università del Piemonte Orientale "A. Avogadro", INSTM, UdR Alessandria, Viale T. Michel 11, 15121, Alessandria, Italy.,Laboratorio MDM, IMM-CNR, Via C. Olivetti 2, 20864, Agrate Brianza, MB, Italy
| | - Gabriele Seguini
- Laboratorio MDM, IMM-CNR, Via C. Olivetti 2, 20864, Agrate Brianza, MB, Italy
| | - Monica Ceresoli
- Laboratorio MDM, IMM-CNR, Via C. Olivetti 2, 20864, Agrate Brianza, MB, Italy.,Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, Milan, 20133, Italy
| | - Michele Perego
- Laboratorio MDM, IMM-CNR, Via C. Olivetti 2, 20864, Agrate Brianza, MB, Italy
| | - Valentina Gianotti
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT), Università del Piemonte Orientale "A. Avogadro", INSTM, UdR Alessandria, Viale T. Michel 11, 15121, Alessandria, Italy.
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Detailed study of polystyrene solubility using pyrolysis–gas chromatography–mass spectrometry and combination with size-exclusion chromatography. Anal Bioanal Chem 2013; 406:459-65. [DOI: 10.1007/s00216-013-7461-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 10/20/2013] [Accepted: 10/23/2013] [Indexed: 10/26/2022]
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Chojnacka A, Kempe K, van de Ven HC, Englert C, Hoogenboom R, Schubert US, Janssen HG, Schoenmakers P. Molar mass, chemical-composition, and functionality-type distributions of poly(2-oxazoline)s revealed by a variety of separation techniques. J Chromatogr A 2012; 1265:123-32. [DOI: 10.1016/j.chroma.2012.09.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 09/19/2012] [Accepted: 09/20/2012] [Indexed: 10/27/2022]
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Chromatographic examination of the chemical composition and sequence distribution of copolymers from ethyl and benzyl diazoacetate. J Chromatogr A 2012; 1255:259-66. [DOI: 10.1016/j.chroma.2012.02.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 01/19/2012] [Accepted: 02/23/2012] [Indexed: 11/21/2022]
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