drastically
increased by more than 42 times the strain of PBS without CAB
from 13 to 527%. In spite of such a high strain at break, the tensile
strength for the 10% CAB (36 MPa) blend was almost equal to the
PBS without CAB (33 MPa). The strain at break and the tensile
strength decreased with the further addition of CAB, and the blends
over 80% CAB were very brittle due to the effect of the CAB brittleness.
Itwas found that the addition of a small amount of CABwas
effective for plasticizing PBS without decreasing the tensile
strength. Itwas postulated that this plasticizing effect of CAB on PBS
was derived from the change in the crystalline state of PBS as
mentioned above. The different crystalline state formed by a small
amount of CAB could disturb the original crystalline state by an
intermolecular interaction. The drastic change in the mechanical
properties using 10% CAB coincided with the thermal properties