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Sains Malaysiana 46(10)(2017): 1817–1823 http://dx.doi.org/10.17576/jsm-2017-4610-19 Sintesis dan Pencirian Getah Asli Cecair Terhidrogen untuk Adunan Polimer (Synthesis
and Characterization of Hydrogenated Liquid Natural Rubber for
Polymer Blending) MUHAMMAD JEFRI
MOHD
YUSOF,
IBRAHIM
ABDULLAH
& SITI FAIRUS M YUSOFF* Pusat Pengajian Sains Kimia dan Teknologi Makanan,
Fakulti Sains
dan Teknologi, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor
Darul Ehsan, Malaysia Received: 9 March
2017/Accepted: 20 September 2017 ABSTRAK Sistem hidrazin hidrat/hidrogen peroksida (HH/H2O2)
digunakan untuk
menjana sumber hidrogen bagi tujuan
penghidrogenan getah
asli cecair (LNR)
melalui penghasilan diimida. Spesies
diimida yang terhasil
akan membekalkan
sumber hidrogen
kepada ikatan karbon
ganda dua
dalam rantai polimer
LNR.
Getah
asli cecair terhidrogen
(HLNR)
yang terhasil menunjukkan
ciri lebih tahan
suhu berbanding
LNR.
Suhu
degradasi HLNR didapati
meningkat pada
435°C berbanding LNR iaitu
pada 381°C. HLNR seterusnya dijadikan pengserasi dalam penghasilan adunan polimer polistirena/getah asli, PS/NR/HLNR (60/35/5).
Kekuatan regangan
dan impak PS/NR masing-masing meningkat sebanyak 70.7% dan 149.6% setelah HLNR ditambah
sebagai pengserasi
dalam adunan. Beberapa pemerhatian
morfologi melalui
mikroskop optik dan SEM turut menyokong kesan penyerasian adunan PS/NR
dengan HLNR. Kata kunci:
Adunan polimer;
diimida; penghidrogenan; pengserasi; spektroskopi ABSTRACT Hydrazine
hydrate/hydrogen peroxide system (HH/H2O2)
was used in this study to generate hydrogen source for the hydrogenation
of LNR
via production of diimide.
Those diimide species supplied hydrogen
source to be bonded with the double bonds of LNR.
HLNR
exhibited improved thermal properties than LNR.
The degradation temperature of HLNR was found to be higher at
435°C than LNR that was only at 381°C. HLNR was
then used as a compatibilizer in the
polymer blending of polystyrene/natural rubber, PS/NR/HLNR (60/35/5). The tensile
strength and impact strength of PS/NR were increased 70.7% and
149.6%, respectively, when HLNR was added into the blends. Several
morphological observations through optical microscope and SEM
supported the compatibilizing
effect of HLNR in
PS/NR
blending. Keywords:
Compatibilizer; diimide;
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*Corresponding author; email: sitifairus@ukm.edu.my
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