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https://hdl.handle.net/20.500.13091/6368
Title: | Synthesis of P(N-Isopropyl Acrylamide- Hydroxypropyl Methacrylate) Thermo Responsive Copolymer Films By Initiated Chemical Vapor Deposition Method | Authors: | Sevgili Mercan, Emine Yilmaz, Kurtulus Karaman, Mustafa |
Keywords: | Thermo-responsive iCVD LCST Polymeric Thin Film Hydrogel Poly N-Isopropylacrylamide Thin-Films Lcst Poly(N-Isopropylacrylamide) Polymerization Architecture Particles Hydrogels Atrp |
Publisher: | Konya Teknik Univ | Abstract: | This study illustrates the deposition of thermo responsive p(N-isopropyl acrylamidehydroxypropyl methacrylate) p(NIPAAm-HPMA) copolymer thin films by initiated chemical vapor deposition (iCVD) method using tert-butyl peroxide (TBPO) as the initiator. Copolymers were deposited at three different HPMA flow rates and the effects of NIPAAm/HPMA flow rate ratio on the deposition rate, structure and responsive properties of the as-deposited films were investigated. The highest deposition rate of 50 nm/min was observed for the copolymer deposited using lowest NIPAAm/HPMA monomer ratio studied. The deposition rate showed a significant increase with decreasing NIPAAm/HPMA flow ratio. Results of FTIR and XPS spectroscopy analyses revealed a significant preservation of structural retention in iCVD p(NIPAAm-HPMA) thermo-responsive films. Lower critical solution temperatures (LCST) of p(NIPAAm-HPMA) films were determined by carrying out a temperature-dependent contact angle analysis. Accordingly, it was shown that LCST was varied between 19 and 23 degree celsius, which was observed to be dependent on the NIPAAm/HPMA monomer ratio. That LCST range is considerably below the literature- reported values for pNIPAAM, which makes the as-deposited copolymer suitable for applications that require thermos-responsive properties at lower temperatures. | URI: | https://doi.org/10.36306/konjes.1408922 https://search.trdizin.gov.tr/tr/yayin/detay/1264103 https://hdl.handle.net/20.500.13091/6368 |
ISSN: | 2667-8055 |
Appears in Collections: | TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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