Sains Malaysiana 45(12)(2016): 1981–1986

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

Received: 21 June 2016/Accepted: 19 October 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

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*Corresponding author; email: linda@ukm.edu.my