Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis and characterization of polylactide-poly(methyl methacrylate) copolymer by combining of ROP and AGET ATRP

  • Choochottiros, Chantiga (Department of Polymer Science and Engineering, Inha University) ;
  • Park, Eunha (Department of Polymer Science and Engineering, Inha University) ;
  • Chin, In-Joo (Department of Polymer Science and Engineering, Inha University)
  • Published : 2012.05.25
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Abstract

Block copolymers of polylactide (PLA) and poly(methyl methacrylate) (PLA-PMMA) were synthesized by the combination of ring-opening polymerization (ROP) and activator generated by electron transfer for atom transfer radical polymerization (AGET ATRP), where PLA was prepared as macroinitiator with active bromo end group (PLA-Br). Tin octoate ($Sn(oct)_{2}$) and benzyl alcohol were applied as the initiation system for ROP of lactide. During AGET ATRP, copper (II) chloride ($CuCl_{2}$) with N,N,N',N",N"- pentamethyl-diethylenetriamine (PMDETA) was used as the catalyst system including Sn(oct)2 as reducing agent. At the feed ratio [PLA-Br]/[$CuCl_{2}$]/[PMDETA]/[$Sn(oct)_{2}$]/[MMA] of 1/1/9.6/0.45/100, the mole fraction of the PMMA block was 0.6 as determined by $^{1}H$ NMR. Thermal stability of PLA was enhanced by incorporating of PMMA as block copolymers. In addition, blend between of PLA and PLA-PMMA copolymer was investigated and 5 phr of PLA-PMMA showed optimum condition to decrease in Young's modulus and increase in impact strength.

Keywords

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