Work

Thermal and Mechanical Properties of Biodegradable Star‐Shaped/Linear Polylactide Stereocomplexes

Year: 2015

Type: article

Abstract: The 6‐arm star‐shaped poly(L‐lactide) (6PLL)/linear poly(D‐lactide) (1PDL) stereocomplex films were prepared by the solvent casting method. The influences of the 6PLL/1PDL blend ratios (75/25, 50/50, and 25/75 w/w) and 1PDL molecular weights (15,000, 30,000, and 60,000 g/mol) on the thermal and mechanical properties of the stereocomplex films were investigated. The 6PLL and 1PDLs had a single melting temperature ( T m ) of homocrystallites at 174°C and 167°C, respectively. The 6PLL/1PDL blends had two T m s: a lower T m of homocrystallites (160–173°C) and a higher T m of stereocomplex crystallites (219–228°C). The stereocomplex crystallinity and mechanical properties of the 6PLL/1PDL blend films were higher than those of 6PLL and 1PDL and were the highest in the 50/50 (w/w) blend ratio. However, the stereocomplex crystallinity of the 50/50 (w/w) 6PLL/1PDL blend films decreased and the mechanical properties increased as the molecular weight of 1PDL increased.

Source: Journal of Chemistry

DOI: 10.1155/2015/206123

Authors: Onanong Cheerarot, Yodthong Baimark

Institution: Mahasarakham University

Language: English

Topic: biodegradable polymer synthesis and properties

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,160

Funders: Mahasarakham University, Office of the Higher Education Commission, Center of Excellence for Innovation in Chemistry