Effect of Ultrasound on Molecular Structure Development of Polylactide |
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| Authors: | Wenting Bao Shaoyun Guo Anant Paradkar Adrian Kelly Elaine Brown |
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| Affiliation: | 1. The State Key Laboratory of Polymer Materials Engineering , Polymer Research Institute of Sichuan University , Chengdu , China;2. Center for Pharmaceutical Engineering Science , University of Bradford , Bradford , United Kingdom;3. Advanced Materials RKT Center, Polymer IRC , University of Bradford , Bradford , United Kingdom |
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| Abstract: | In this work, effect of ultrasound on molecular structure development of Polylactide (PLA) was studied. It was found that the intrinsic viscosity of PLA decreased with increasing treating time, temperature and ultrasound time. Different from traditional thermal degradation of PLA, the degradation of PLA under ultrasound treatment showed that chain scission and chain combination of PLA competed with each other in the degradation process, which could be divided into two steps. The mechanism of ultrasound degradation of PLA was proposed. Furthermore, Thermal properties were characterized by DSC to show heat and ultrasound effects on molecular structure development of PLA. |
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| Keywords: | Combination Degradation Molecular structure Polylactide Ultrasound |
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