Article
  • Effects of Block Structure and Poly(propylene glycol) Block Length on Stereocomplexation and Mechanical Properties of Poly(propylene glycol)-b-Polylactide Blend Films
  • Yodthong Baimark and Yaowalak Srisuwan

  • Biodegradable Polymers Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand

  • Poly(propylene glycol)-b-Polylactide 블렌드 필름의 Stereocomplexation과 기계적 물성에 미치는 Poly(propylene glycol)의 블록 구조와 길이의 영향
Abstract

Stereocomplex polylactide (scPL) shows better mechanical properties than both poly(L-lactide) (PLL) and poly(D-lactide) (PDL). However, scPL is still brittle. In this work, di- and triblock copolymers of poly(propylene glycol) (PPG) and polylactide (PLL or PDL) were synthesized for the preparation of scPL films. The influences of the block structure, PPG block length and blend ratio on stereocomplexation, film morphology and mechanical properties of the scPL films were investigated. From DSC and WAXD results, the 50/50 wt% blend films exhibited the highest stereocomplexation. Phase separation between the scPL and PPG phases was not found from their SEM images. The tensile stress and elongation at break of the blend films increased with the sterecomplex crystallinities. The longer PPG blocks improved both the stereocomplexation and elongation at break of the blend films. In conclusion, the block structures and PPG block lengths influenced on both the stereocomplexation and mechanical properties of the scPL films.


Keywords: stereocomplex, polylactide, poly(propylene glycol), block copolymers, mechanical properties

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2018; 42(3): 385-393

    Published online May 25, 2018

  • 10.7317/pk.2018.42.3.385
  • Received on Sep 11, 2017
  • Revised on Nov 15, 2017
  • Accepted on Nov 15, 2017

Correspondence to

  • Yodthong Baimark
  • Biodegradable Polymers Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand

  • E-mail: yodthong.b@msu.ac.th