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Sains
Malaysiana 47(9)(2018): 2163–2169
http://dx.doi.org/10.17576/jsm-2018-4709-26
Effects of Kenaf
Loading and Alkaline Treatment on Properties of Kenaf
Filled Natural Rubber Latex Foam (Kesan Pembebanan Kenaf dan Perawatan
Alkali ke atas
Sifat Busa Lateks
Getah Asli
Terisi Kenaf) AHMAD
FIKRI
ABDUL
KARIM1,
HANAFI
ISMAIL1,2* & ZULKIFLI MOHAMAD
ARIFF1
1School of Materials and Mineral Resources Engineering, Engineering
Campus, Universiti Sains
Malaysia, 14300 Nibong Tebal,
Pulau Pinang, Malaysia 2Clusters for Polymer Composites (CPC), Science and Engineering Research
Centre, Engineering Campus, Universiti
Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia Received: 21 June 2017/Accepted: 21 May 2018 ABSTRACT This
research was carried out to study the effects of kenaf
loading and alkaline treatment on tensile properties, density,
thermal and morphological properties of kenaf
filled natural rubber latex foam (NRLF). Samples were prepared using a
Dunlop method. From the results, increasing loading of kenaf
reduced the tensile strength and elongation at break for both
samples, treated and untreated kenaf
filled NRLF.
Meanwhile, modulus at 100% elongation and density increased
with an increased in kenaf loading.
Samples with treated kenaf showed higher tensile strength, modulus at 100% elongation
and density but low in elongation at break as compared with
samples with untreated kenaf. Thermal
study by using thermogravimetric analysis (TGA) showed that thermal stability
reduced with increased in kenaf loading
for both samples. Samples with treated kenaf
have higher thermal stability compared with samples of untreated
kenaf. The filler-matrix interaction
and the pores size variation of both samples was clearly seen
in the micrograph images by using scanning electron microscope
(SEM). Keywords:
Alkaline treatment; foam; kenaf; latex
ABSTRAK Kajian ini dilakukan
untuk mengkaji
kesan pembebanan kenaf dan perawatan
alkali ke atas
sifat tensil, ketumpatan,
terma dan
morfologi busa lateks getah asli
terisi kenaf
(NRLF). Sampel telah disediakan
menggunakan kaedah
Dunlop. Keputusan
menunjukkan pertambahan pembebanan kenaf mengurangkan kekuatan tensil dan pemanjangan
pada takat
putus untuk kedua-dua
sampel NRLF terisi
kenaf terawat
dan tidak terawat.
Manakala,
modulus pada 100% pemanjangan
dan ketumpatan
meningkat dengan peningkatan pembebanan kenaf. Sampel dengan kenaf
terawat menunjukkan kekuatan tensil, modulus pada 100% pemanjangan dan ketumpatan yang lebih tinggi tetapi
rendah pemanjangan
pada takat putus
berbanding sampel
dengan kenaf tidak
terawat. Kajian terma menggunakan
analisis termogravimetrik
(TGA)
menunjukkan kestabilan
terma berkurang dengan peningkatan pembebanan kenaf untuk kedua-kedua sampel. Sampel dengan kenaf
terawat mempunyai kestabilan terma yang lebih tinggi berbanding
sampel tanpa
rawatan. Interaksi pengisi-matriks dan perubahan saiz liang di dalam
kedua-dua sampel
boleh dilihat dengan
jelas di dalam
imej mikrograf menggunakan mikroskop elektron imbasan (SEM). Kata kunci: Busa; kenaf;
lateks; perawatan
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Mechanical and Composite Materials 31: 589-592. *Corresponding author; email: ihanafi@usm.my/profhanafi@gmail.com
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