Effect of LTI content on impact fracture property of PLA/PCL/LTI polymer blends
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Biodegradable thermoplastic, poly (lactic acid) (PLA), has been used in a variety of industrial fields including automotive, computer, food and electric appliances. PLA has also been utilized as a bioabsorbable material in medical fields such as orthopedics and oral surgery [1, 2]. Fracture properties and behavior of PLA have been characterized, and it was found that multiple-crazes are formed in crack-tip region prior to crack initiation, similarly to the fracture behavior of brittle polymers such as PP and PS [3, 4, 5, 6, 7]. Improvement of toughness of such brittle polymers can generally be achieved by blending a ductile secondary phase to the base polymer. Recently, poly(ε-caprolacton) (PCL), a ductile biodegradable thermoplastics, has been chosen as a blending partner for PLA [8, 9, 10, 11, 12, 13, 14], and the fracture toughness of PLA/PCL blend was found to be effectively greater than that of neat PLA . It was, however, also found that the immiscibility between PLA and PCL...
KeywordsFracture Toughness Crack Initiation Impact Fracture Drop Weight Impact Brittle Polymer
- 9.Todo M, Arakawa K, Tsuji H, Takenoshita Y Proc the SEM X, Paper No 55 (CD-ROM)Google Scholar