KESAN PENAMBAHAN HABUK KAYU CENGAL TERHADAP SIFAT KEKERASAN LDPE (Low Density Polyethylene)

Abstract

Abstrak
Kajian ini melibatkan Polietelena Berketumpatan Rendah (LDPE) diadun dengan bahan tambah iaitu
habuk kayu Cengal (HK). Habuk kayu dapat dimajukan, ini kerana sisa kayu dapat mengurangkan
kos penggunaan bahan asli dalam pengeluaran. Lantaran itu, kajian dilakukan berhubung dengan
kekekerasan sesuatu bahan campuran yang dihasilkan. Oleh itu, satu kajian dilakukan bagi menentukan
kesan penambahan habuk kayu terhadap kekerasan bahan LDPE yang akan dihasilkan. Kajian dilakukan
dengan melihat kesan ke atas penambahan habuk kayu dengan sifat LDPE tulen. Pemerhatian dilakukan
terhadap sifat mekanikal LDPE yang dikurangkan kuantiti jisimnya dengan nisbah penambahan habuk
kayu sebanyak 3, 6, 9, 12 dan 15 peratus. Habuk kayu diayak menerusi pengayak yang bersaiz 200
?m dan ditimbang mengikut campuran penambahan. Sampel dihasilkan menggunakan mesin suntikan
panas bagi tujuan ujian kekerasan. Keputusan ujian dianalisa bertujuan untuk membuat perbandingan
dengan 100% LDPE dengan peratusan HK yang ditetapkan. Ujian kekerasan secara keseluruhannya
meningkat. Peningkatan paling tinggi adalah pada sampel 12% HK iaitu sebanyak 8.2%. Dalam kajian
ini kekerasan bahan meningkat dengan penambahan HK. Kajian lanjut tentang kekuatan bahan boleh
diteruskan melalui penambahan saiz partikel pengisi yang lebih halus.

Abstract
The study involved Low Density Polyethylene (LDPE) blended with additive that is sawdust Cengal (HK).
Sawdust can be developed, because wood waste can reduce the use of natural materials in production.
Thus, a study was undertaken in relation to the hardness of the produced mixture. Therefore, a study was
conducted to determine the effect of wood dust on he hardness of the produced mixture LDPE material to
be produced. The study was undertaken by looking at the effect of adding the quantity of sawdust to the
nature of pure LDPE. Observations were made on the mechanical properties of LDPE when the quantity
of mass is reduced by increasing the sawdust ratio from 3 to 6, 9, 12 and 15 percent. Sawdust was sifted
through a sieve with the size of 200 ?m and weighed by the addition of a mixture. Samples for hardness
test were produced by using injection hot machine. The test results are analyzed in order to make a
comparison with 100 % LDPE with HK prescribed percentage. (It is found that overall, the hardness of the
produced mixture has increase. The highest increase (8.2 %) was shown by the 12%HK sample). In this
study, the hardness increased with the addition of HK. Further study of the strength of the material can be
pursued through the addition of finer particle size filler.