Radiation grafting of N,N′-dimethylacrylamide and N-isopropylacrylamide onto polypropylene films by two-step method |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China;2. Ru?er Bo?kovi? Institute, Bijeni?ka cesta 54, 10000 Zagreb, Croatia;1. State Key Laboratory of Hollow Fabric Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, China;2. School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;3. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;1. Sorbonne Universités, UPMC Univ Paris 06 & CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire (IPCM), F-75005 Paris, France;2. CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire (IPCM), F-75005 Paris, France;3. ICSN CNRS, Av. de la Terrasse, 91198 Gif-sur-Yvette Cedex, France;4. Université de Strasbourg, Laboratoire d''Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie, 67081 Strasbourg, France;5. Université de Lyon, Institut de chimie de Lyon, UMR 5265 CNRS-Université Lyon I-ESCPE Lyon, 69616 Villeurbanne, France;1. Hubei Key Laboratory of Biomass-Resource Chemistry and Environmental Biotechnology, Hubei Engineering University, Xiaogan 432000, China;2. Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, Hubei Engineering University, Xiaogan, Hubei 432000, China |
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| Abstract: | Polypropylene (PP) films were modified by the consecutive grafting of N,N′-dimethylacrylamide (DMAAm) and N-isopropylacrylamide (NIPAAm) (two-step method) using preirradiation method with gamma-rays. The effect of absorbed dose, monomer concentration and reaction time on the degree of grafting was determined. The grafted samples were verified by the FTIR-ATR spectroscopy; thermal properties were analyzed by differential scanning calorimetry (DSC) and the stimuli-responsive behavior was studied by swelling and contact angle in water as well as DSC. Thermoresponsive films of (PP-g-DMAAm)-g-NIPAAm presented a lower critical solution temperature (LCST) at 36.5 °C. |
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