Natural Rubber Latex (NRL) was compounded with 0e25 phr sago starch filler loadings. Effects of soil
decomposition/degradation process on the mechanical properties of NRL films were investigated. Results
showed that incorporation of sago starch decreased the physical properties of NRL composite films. As
sago starch loading was increased, the physical properties of sago starch filled NRL (SSNRL) composite
films decreased compared to control NRL films. The results indicated that optimum physical properties
were achieved by 10 phr SSNRL composite films. Decomposition of NRL films was assessed through films
mass loss and water vapor transmission rates of films. SEM analysis confirmed decomposition progress
and filler agglomeration formation of NRL films as sago starch loading was increased above optimum
loading. Fourier Transform Infra-Red analysis indicated doubly bonded carbon breakage in control (0), 10,
and 25 phr films and carbonyl groups intensification signifying aldehyde and ketones groups’ formation
at the last week of soil decomposition period.