Preparation and characterization of poly (L-Lactic acid plla) blends and plla scaffold.
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Date
2011-02
Authors
Vannaladsaysy, Villay
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Pengoptimunan gaulan poli(L-laktik asid) (PLLA) telah dihasilkan melalui pengaulan polimer bio liat seperti poli(kaprolakton) (PCL), poli(butil suksinat-ko-L-laktad) (PBSL) dan poli(butilena suksinat-ko-e-kaprolakton) (PBSC) dan penambahan agen perserasian seperti lysine triisosianat (LTI) dan tiga blok kopolimer polietilena oksida - polipropilena oksida - polietilena oksida (PEO-PPO-PEO). Penyediaan perancah berasaskan PLLA juga dipertimbangkan dalam kajian ini. Dalam siri pertama, kesan komposisi campuran (100/0, 90/10, 80/20, 70/30, 50/50, 25/75 dan 0/100 % berat) ke atas sifat morfologi, mekanikal dan haba bagi campuran PLLA/PCL, PLLA/PBSL, dan PLLA/PBSC telah dilakukan. Didapati sifat kelenturan menurun dengan peningkatan kandungan PCL atau PBSL atau PBSC. Ini telah dikesan menerusi pelekatan antara muka yang tidak baik di antara PLLA dan PCL atau PBSL atau PBSC seperti yang diperhatikan dalam morfologi fasa pemisahan.
Optimization of poly(L-lactic acid) (PLLA) blends was carried out by blending with ductile biopolymers such as poly(ε-caprolactone) (PCL), poly(butylene succinate-co-L-lactate) (PBSL) and poly(butylene succinate-co-e-caprolactone) (PBSC) and addition of compatibilizer such as lysine triisocyanate (LTI) and polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) triblock copolymer. Preparation of PLLA based scaffold was also been considered in the present study. In the first series, the effects of blend composition (100/0, 90/10, 80/20, 70/30, 50/50, 25/75 and 0/100 wt%) on the morphological, mechanical and thermal properties of PLLA/PCL, PLLA/PBSL, and PLLA/PBSC blends were carried out. It is found that the bending properties decreased with increasing PCL or PBSL or PBSC contents. This was traced by the poor interfacial adhesion between PLLA and PCL or PBSL or PBSC as observed in the phase separation morphology.
Description
Keywords
Characterization , Scaffold