ポリブチレンサクシネートアジペート(PBSA)複合材の機械的物性に及ぼす天然繊維(NF)の影響

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The biodegradable polymer polybutylene succinate adipate (PBSA), which has been derived from fossil raw material, was developed as a substitute material for low-density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS), which are used as wrapping or container materials. However, PBSA cannot be used for food containers or wrapping material because of its low heat resistance and low rigidity. The development of PBSA/natural fiber (NF) composites was attempted in order to improve the physical properties and facilitate the disposal process without ruining the natural decomposition character of the biodegradable polymer. The NFs supplied in the present experiment used a botanical fiber made by hand that was harvested from natural kozo (KozF) and conifer (ConF), and an animal fiber (SilF) that was harvested from a silkworm cocoon. We found that the mechanical properties of the PBSA could be improved without ruining the biodegradability of the polymer by filling it with the natural fibers of KozF, ConF, and SilF to matrix PBSA. Using this method, the tensile moduli of the PBSA/ConF, PBSA/KozF, and PBSA/SilF composites were increased to 2.5 times, 3.3 times, and 4 times, respectively, as compared to neat PBSA. This is considered to be a remarkable improvement. The tensile strength of PBSA composites containing 20wt% NFs was improved by 6% in ConF, 25% in KozF, and 46% in SilF compared to that of neat PBSA. The Izod impact value of the PBSA/KozF and PBSA/ConF composites was increased to 2.5 times that of the neat PBSA, while the Izod impact value of the PBSA/SilF composites showed the most improvement by increasing to 4.3 times that of PBSA.
2009-04-30

ポリブチレンサクシネートアジペート(PBSA)複合材の機械的物性に及ぼす天然繊維(NF)の影響

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