Sains Malaysiana 40(9)(2011): 1029–1035

Penyediaan dan Pencirian Komposit Upr/Lnr/Gentian Kaca Terawat Menggunakan Resin Poliester Tak Tepu daripada Bahan Buangan PET

(Preparation and Characterization of UPR/LNR/Glass Fiber Composite by using Unsaturated

Polyester Resin (PET) from PET Wastes)

Siti Farhana Hisham, Ishak Ahmad* & Rusli Daik

Pusat Pengajian Sains Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

Anita Ramli

Bahagian Kejuruteraan Kimia , Universiti Teknologi PETRONAS, Bandar Seri Iskandar,

31750 Tronoh, Perak, Malaysia

Diserahkan: 16 Jun 2010 / Diterima: 23 Disember 2010

ABSTRAK

Komposit UPR/LNR/gentian kaca telah disediakan dengan menggunakan resin poliester tak tepu daripada hasil pengitaran semula bahan buangan PET. Kajian dimulai dengan pengitaran semula botol minuman PET melalui proses glikolisis dan hasilnya ditindakbalaskan dengan maleik anhidrida untuk mendapatkan resin poliester tak tepu. Kajian diteruskan dengan penyediaan adunan resin poliester tak tepu (UPR) dengan cecair getah asli (LNR) iaitu komposisi penambahan LNR ke dalam UPR telah diubah dari 0-7.5% (wt). Komposisi UPR/LNR dengan sifat mekanik terbaik dipilih sebagai matrik untuk penyediaan komposit berpenguat gentian kaca. Rawatan silana ke atas gentian kaca turut dilakukan dengan menggunakan (3-Aminopropil)triethoxysilane. Hasil daripada kajian mendapati adunan UPR/LNR dengan penambahan 2.5% LNR mempunyai sifat mekanik dan morfologi terbaik dengan partikel-partikel getah yang bersaiz kecil dapat tersebar dengan sekata dalam UPR. Kajian juga menunjukkan berlakunya peningkatkan dalam nilai tegasan, modulus regangan dan kekuatan hentaman bagi komposit UPR/LNR/gentian kaca terawat berbanding dengan penggunaan gentian tanpa rawatan.

Kata kunci: Cecair getah asli (LNR); gentian kaca; kitar semula PET; rawatan silana; resin poliester tak tepu (UPR)

ABSTRACT

UPR/LNR/glass fibre composite had been prepared by using unsaturated polyester resin (UPR) based from recycled PET product. PET waste was recycled by glycolisis process and the glycolised product was then reacted with maleic anhydride to produce unsaturated polyester resin. The preparation of UPR/LNR blends were conducted by varying the amount of LNR addition to the resin ranging from 0-7.5% (wt). The composition of UPR/LNR blend with good mechanical properties had been selected as a matrix of the glass fiber reinforced composite. Glass fibre was also treated by (3-Aminopropil)triethoxysilane as a coupling agent. From the result, the addition of 2.5% LNR in UPR had showed the optimum mechanical and morphological properties where the elastomer particels were well dispersed in the matrix with smaller size. The silane treatment on the glass fiber increased the tensile and impact strength values of the UPR/LNR/GF composite compared to untreated fiber reinforcement.

Keywords: Glass fiber; liquid natural rubber (LNR); recycled PET; silane treatment; unsaturated polyester resin (UPR)

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*Pengarang untuk surat-menyurat; e-mail: gading@ukm.my