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http://dx.doi.org/10.17576/jsm-2016-4512-23 Kesan Triali Isosianurat
(TIAC) Terhadap Sifat Tegangan
Filem Poly L-Laktid Asid (PLLA) yang Diiradiasi Gamma
dan Alur Elektron (The Effect of Trially
Isocyanurate (TIAC) on the Tensile
Property of Poly L-Lactide Acid (PLLA) Film Irradiated under
Gamma and Electron Beam) Mohd Reusmaazran bin Yusof1, Roslinda Shamsuddin2*, Yusof Abdullah1 & Norzita bt Yaacob1 1Kumpulan Teknologi
Bahan, Agensi Nuklear Malaysia, Bangi, 43000 Kajang, Selangor Darul
Ehsan, Malaysia 2Program Sains
Bahan, Pusat Pengajian Fizik Gunaan, Fakulti Sains & Teknologi,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia Diserahkan:
21 Jun 2016/Diterima:
19 Oktober 2016 ABSTRAK PLLA merupakan biodegrasi polimer yang mempunyai aplikasi yang meluas
dalam pelbagai bidang industri dan perubatan. Dalam kajian ini,
PLLA telah
dicampurkan dengan triali isosianurat (TIAC) antara 1 hingga 6 v/v% bagi
melihat perubahan sifat tegangan dan terikan filem PLLA.
TIAC
biasanya digunakan sebagai agen taut silang dan keplastikan
untuk mengubah sifat polimer. Campuran PLLA-TIAC telah diiradiasi pada
10 kGy di bawah alur elektron (EB) dan gamma (γ). Keputusan
menunjukkan kekuatan tegangan (tegasan maksimum) menurun dengan
peningkatan kandungan TIAC di dalam PLLA tetapi
meningkat sedikit pada 4 v/v% TIAC bagi PLLA iradiasi
dan tanpa iradiasi. Manakala nilai terikan didapati meningkat pada
TIAC
2 v/v% dan menurun apabila TIAC ditambah melebihi 2% v/v%
terutamanya bagi PLLA yang diiradiasikan. Daripada keputusan
DSC terdapat perubahan pada suhu peralihan kaca, Tg,
suhu penghabluran sejuk, Tc, entalpi penghabluran sejuk, Hc dan
suhu peleburan, Tm menunjukkan berlaku perubahan pergerakan
rantaian PLLA dan fasa penghabluran dengan kehadiran
TIAC dan sinaran mengion di dalam PLLA.
Perubahan pada puncak penyerapan spektra infra merah jelmaan fourier
(FTIR)
menunjukkan berlaku penggantian atau kemasukkan molekul TIAC ke
dalam rantian PLLA. Kata kunci: Iradiasi elektron;
iradiasi gamma; kekuatan tegangan; PLLA;
TIAC ABSTRACT PLLA is a biodegradable polymer that is widely used in industrial and
medical field. In this works, PLLA was mixed with 1-6 v/v% with
(TIAC) to investigate the changes in tensile and strains
properties of the PLLA film. PLLA commonly
used as plasticizer or crosslinked agent to change the polymer property.
PLLA
and TIAC mixture was irradiated under 10
kGy doses for both of gamma (γ) and electron beam (EB).
The results showed that the tensile strength (maximum stress) reduce
with the increasing of TIAC amount in the PLLA but slightly increase at
4 v/v% TIAC addition for both irradiated and non-irradiated PLLA.
Strain was found to increase at 2 v/v%. TIAC but decreased when more than
2 v/v% TIAC was added for irradiated PLLA.
DSC
results showed the changes in glass transition temperature,
Tg,
cold crystallization enthalpy, Hc, cold crystallization temperature,
Tc and melting temperature, Tm indicate
the changes in mobility of PLLA chain and crystallization regions
with present of TIAC and ionizing radiation in PLLA.
The changes in fourier transform infra-red (FTIR)
absorptions peak indicate the penetrating of TIAC molecules
into the PLLA chains. Keywords: Electron beam irradiation; gamma irradiation; PLLA; tensile strength; TIAC RUJUKAN Eftekhari, S.,
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*Pengarang untuk surat-menyurat; email: linda@ukm.edu.my
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