Journal
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
Volume 67, Issue 3, Pages 192-198Publisher
TAYLOR & FRANCIS AS
DOI: 10.1080/00914037.2017.1320654
Keywords
epsilon-Caprolactone; carbon dioxide; drug delivery; polycarbonates; propylene oxide; terpolymerization
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Funding
- National Natural Science Foundation of China [51003051, 51303093]
- Science-Technology Foundation for Middle-aged and Young Scientist of Shandong Province, China [BS2011CL021, BS2013CL007]
- Shandong Provincial Natural Science Foundation, China [ZR201702070122]
- High-level Talent Initial Funding for Scientific Research of Qingdao Agricultural University [631324]
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An aliphatic poly(propylene carbonate-co-epsilon-caprolactone) (PPCCL) was synthesized by terpolymerization of CO2, propylene oxide, and epsi;-caprolactone (CL) using SalenCo(III)(2,4-dinitrophenoxy) (Salen = N, N-bis (3,5-di-tert-butylsalicylidene)-ethylenediimine) (1)/1,10-phenanthroline monohydrate catalyst system. The obtained terpolymers were characterized by IR and H-1 NMR to determine its structure. The reactivity ratios of CO2 and CL (r(CO2) = 6.54 and r(CL) = 0.22) were evaluated by Fineman-Ross methodology. The reaction conditions were optimized according to the factors affecting the terpolymerization. The results indicated that the polymer yield is high to 7.15 g using 0.1 mmol complex 1 for 10 h. Using the PPCCL as the carrier, PPCCL microcapsule was prepared through solvent volatilization. The stirring speed had a significant effect on morphology and particle size of PPCCL microcapsules. The composition of terpolymer had little effect on morphology and particle size of PPCCL microcapsules. However, the rate of imidacloprid release from the microcapsules was accelerated with the amount of polyester component in terpolymer increasing.
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