Temperature sensitive behavior of poly(N-isopropylacrylamide) grafted onto electron beam-irradiated poly(propylene)

Abstract:

N-Isopropylacrylamide (NIPAAm) was graft-polymerized from its acetone solution onto poly(propylene) (PP) films, after electron-beam irradiation in the presence of air oxygen. The effects of pre-irradiation dose as well as monomer concentration, reaction temperature and reaction time on the grafting efficiency were investigated. Typical conditions for achieving maximum grafting yield were observed for 1 M monomer concentration, after PP pre-irradiation with a 300 kGy dose and a reaction temperature of 50°C. The location of the graft polymerization was examined by different methods including measurements of dimensional variations, calorimetry, SEM and AFM. The temperature-responsive behavior of grafted copolymer was studied by swelling and contact angle measurements at different temperatures. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Año de publicación:

2005

Keywords:

• Hydrophilic polymers
• swelling
• Graft copolymers
• Poly(propylene) (PP)
• Electron beam irradiation

Fuente:

scopus