| dc.description.abstract | LDPE thermoplastics have been made with rice husk ash nanosilica filler which is
synthesized using the coprecipitation method. Nanosynthesis of rice husk ash (RHA)
silica was carried out with HCl 2M and NaOH 2.5M solvents with a ratio of 1:3. The
synthesized nanosilica was then characterized using XRD and obtained an average size
of 23.09 nm. Based on the results of XRF characterization, it is known that there are
92.99% SiO2 and the most abundant element, namely Si 43.47%. The composition of
each LDPE/nanosilica RHA was varied (100/0, 98/2, 96/4, 94/6 and 92/8 % by weight)
and mechanical properties in the form of tensile strength, elongation at break and
modulus of elasticity were tested using ASTM D638 standard. The results of the
mechanical test were obtained with the optimum tensile strength value in the
composition (96/4% by weight) of 10.53 MPa, the optimal elongation value at break
in the composition (100/0% by weight) of 201.5%, and the optimum elastic modulus
value in the composition (96/4% by weight) of 226.57 MPa. The addition of RHA
nanosilica as a filler is proven to be able to improve the mechanical properties of LDPE
thermoplastic in terms of tensile strength and modulus of elasticity compared to LDPE
without filler material (100/0% by weight). | en_US |
