SINTESIS PEREKAT POLIVINIL ASETAT BERBASIS PELARUT METANOL YANG TERSTABILKAN OLEH DISPONIL

SULISTYONINGSIH, SARI MEIWIKA (2014) SINTESIS PEREKAT POLIVINIL ASETAT BERBASIS PELARUT METANOL YANG TERSTABILKAN OLEH DISPONIL. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sintesis polivinil asetat berbasis pelarut metanol telah dilakukan dengan variasi rasio pelarut metanol-air 1:1, 1:2, 1:3, 1:4 dan 2:3. Sintesis tersebut terstabilkan oleh suatu disponil yang mengandung kombinasi antara surfaktan anionik dan non-ionik, serta polivinil alkohol yang berperan sebagai agen pengemulsi. Polimerisasi vinil asetat diinisiasi oleh radikal bebas dari gugus persulfat. Sintesis PVAc masing-masing variasi rasio pelarut dikarakterisasi menggunakan FTIR (Fourier Transform Infrared), TMA (Thermomechanical Analysis), Tensile Strength dan uji viskositas rotasional. Hasil FTIR menunjukkan gugus fungsi yang tepat sebagai senyawa penyusun polivinil asetat. Hasil TMA menunjukkan data koefisien muai panas yang rendah pada produk PVAc dengan rasio pelarut metanol-air 1:4, sehingga ukuran/dimensi polimer tersebut lebih rapat dan kekuatan ikat silangnya juga lebih tinggi. Hasil uji Tensile Strength menunjukkan produk PVAc dengan rasio pelarut metanol-air 1:3 memiliki nilai stress dan modulus elastisitas paling tinggi yaitu masing-masing sebesar 23,4 MPa dan 17,891 MPa. Hasil uji viskositas menunjukkan bahwa PVAc dengan rasio pelarut metanol-air 2:3 memiliki nilai viskositas paling besar yaitu sebesar 5000 cP. Dengan demikian pelarut metanol dapat meningkatkan ketahanan, sifat termal dan mekanik pada material polivinil asetat. ===================================================================================================== Synthesis of polyvinyl acetate-methanol based has been carried out with variations of methanol-water ratio of 1:1, 1:2, 1:3, 1:4 dan 2:3. The synthesis is stabilized by a combination disponil, which containing anionic and non-ionic surfactant, along with polyvinyl alcohol acts as an emulsifying agent. Polymerization of vinyl acetate was initiated by free radicals from the persulfate group. the synthesis of PVAc-methanol based were characterized by FTIR (Fourier Transform Infrared), TMA (Thermomechanical Analysis), tensile strength and rotational viscometer test. The results of FTIR showed that the appropriate functional group as the building compounds of PVAc. The results of TMA indicate that low coefficient of thermal expansion at PVAc with methanol-water ratio of 1:4, so the size or dimension of polymer is closer and higher on the crosslinked strength. The result of tensile strength test showed that PVAc with methanolwater ratio of 1:3 has the highest stress and modulus elasticity which equal to 23,4 MPa and 17,891 MPa. The result of rotational viscometer test showed that PVAc with methanol-water ratio of 2:3 has the highest viscocity value that equal to 5000 cP. Thus methanol can increase the resistance, thermal and mechanical properties of the polyvinyl acetate.

Item Type: Thesis (Undergraduate)
Additional Information: RSKi 547.280 Sul s
Uncontrolled Keywords: Polivinil asetat berbasis pelarut metanol, disponil, polimerisasi emulsi
Subjects: Q Science
Q Science > QD Chemistry
Divisions: Faculty of Mathematics and Science > Chemistry > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 13 Jan 2017 07:02
Last Modified: 13 Jan 2017 07:02
URI: http://repository.its.ac.id/id/eprint/1547

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