Abstract
A photo-rheology method was applied to determine photochemical reactivity of poly(lactic acid) close to glass transition region. The differences in the rheological behaviour were measured during in situ UV irradiation in air. At low frequency (1rads−1), the highest reactivity was observed at the glass transition temperature which corresponds to the data from DSC. Below and above this temperature, the rate of PLA chain scission degradation was lower.Moreover, it was also shown that changing the oscillation frequency led to the maximal rate of the chain scission rate occurring at temperatures slightly higher (shifted due to time-temperature superposition effects).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.