Abstract
Thefracturedsurfacewasexaminedfromtheviewpointofinterfacialchemistry,whenthebiodegradableadhesivecontainingricebranwasusedforwood.Whenpoly(lacticacid)wasusedthecohesivefailurewasmainlyobserved.Whenpoly(butylenessuccinateadipate)andpolj(caprolactone)wereused,theinterfacialfailurewasmainlyobserved.However,thestrengthofpolymeritselfwasconsideredtoplayaveryimportantroleintheadhesivestrengthofthisblendsystemfot､wood.Inthelandfilltest,thenumberofmicroorganismsaroundthetestpiecesincreasedconsiderablywithricebrancontent.Atthesametime,themolecularweightsofpolymersdecreasedwiththericebrancontent.Wecanconcludethatthericebrancontributeslargelytothebiodegradalionrateofthesepolymers.
