| dc.description.abstract | The requirement for wood each year continues to increase while the
availability of wood as a raw material continue to decline and can not suffice the
needs. One effort to overcome this is to use non-wood materials such as seashells and
polyester resin as raw material for particle board. The purpose of this study is to
determine the best composition of reinforcement material in the gypsum composition
ratio of the polyester-shells in the manufacture of particle board. In this study,
particle board made with unsaturated polyester resins as a matrix and mixed with
shells as filler powder with methyl ethyl ketone peroxide as catalyst. To improve the
characteristics of particle board, gypsum added to reinforcement material. Polyester
resin selected as the matrix for ease in fabrication process and easy to obtain. Powder
shells selected for the content of seashells blood that makes it possible to strengthen
the composite and utilize the shells of blood that is considered as waste restaurant
and gypsum have been selected as toughening agent because gypsum contains CaO
component to improve the mechanical properties of particle boards and gypsum is
cheap. The materials used in making composites are unsaturated polyester resins,
methyl ethyl ketone peroxide catalyst, seashells and gypsum powder. Seashells
crushed into powder in advance by using a ball mill and sieved to produce a particle
size of 290 mesh. Particle board is made by mixing powder 290 mesh shells into
polyester resin with a catalyst added to the composition of 30:70 and methyl ethyl
ketone peroxide at 1% along with reinforcement material gypsum from a resin. The
composition of the toughening agent used in this study consisted of 2.5%, 5%, 7.5%,
10% and 12.5%. The mixture was stirred until uniform and then molded using a hot
press. Particle board that has been manufactured and then tested the physical
properties and mechanical properties. The result of this research are analysis of FT IR (Fourier Transform Infra Red) show that the toughening agent gypsym attached
with clamshell and resin polyester. The best reslut for physical and mechanical
properties particle board are density 1,580 g / ml, water content 0,2491%, swelling
thickness 0,358%, the modulus of rupture (MOR) 47,081 MPa, modulus of elasticity
(MOE) 249,09 MPa, internal bond (IB) 15,809 MPa and impact strength 10793.99 J /M2 | en_US |
