Improving the Impact Strength of Polylactic Acid using Biodegradable Poly(butylene adipate-co-terephthalate)
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초록
내용
Polylactic acid(PLA) has recived considerable attention in eco-friendly industry field because it is a biodegrabale material. However, PLA shows the low impact strength and slow crystallization. To overcome these problem, poly(butylene adipate-co-terephthalate)(PBAT) was introduced into PLA as the biodegradable material and impact modifier. However, crystallization rate of PLA wasn’t improved. in this study, PLA was melt blended using a twin screw extruder into PBAT and talc as a nucleating agent. The addition of PBAT increased the impact strength and processability of the PLA. However, the addition of talc in the PLA/PBAT blend decreased the impact strength and processability of the PLA while the crystallization temperature increased. the talc addition of 3 phr in the PLA/PBAT blend showed the optimum impact strength and crystallization temperature, resulting in the superior impact strength and faster crystallization rate compare to neat PLA.