Abstract
In this study, the thermo-sensitive copolymers were synthesized by graft copolymerization of poly N isopropyl acrylamide (PNIPAm) onto chitosan (Ch) and aminated chitosan (AmCh) derivative. Free radical polymerization using potassium persulphate (KPS) as initiator was used for performing the grafting process. FTIR, TGA and DSC analysis were used to verify the structure of the resulting graft copolymers. The thermal sensitivity of the prepared copolymers was determined by monitoring the phase transition temperature at 550nm using a UV–VIS spectrophotometer. The results show that the transition of the PNIPAm-g-Ch is sharper than that of the PNIPAm-g-AmCh and the transition, in both cases, became sharper as increase the PNIPAm grating percentage.
Highlights
Environmental sensitive polymers, known as "smart polymers", are those kinds of polymers which possess the ability to respond to the surrounding environmental conditions in different physic-chemical manners of changes (Lendlein and Shastri, 2010; Grainger and El-Sayed, 2010; Tanaka, 2011)
The thermo-sensitive copolymers were synthesized by graft copolymerization of poly N isopropyl acrylamide (PNIPAm) onto chitosan (Ch) and aminated chitosan (AmCh) derivative
The results show that the transition of the PNIPAm-g-Ch is sharper than that of the PNIPAmg-AmCh and the tr-ansition, in both cases, became sharper as increase the PNIPAm grating percentage
Summary
Environmental sensitive polymers, known as "smart polymers", are those kinds of polymers which possess the ability to respond to the surrounding environmental conditions in different physic-chemical manners of changes (Lendlein and Shastri, 2010; Grainger and El-Sayed, 2010; Tanaka, 2011). The smartness of those polymers came from their capability to recover its native state when the environmental changes are removed (Stuart et al, 2010). Evidences of the modifications were proved using FT-IR, TGA, and DSC
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
