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"Penelitian mengenai pengaruh penambahan bahan pengisi atau filler berupa bahan pati dan bahan kaolin terhadap peningkatan kekuatan rekat Polivinil Asetat (PVAc) telah dilakukan. Penambahan filler dilakukan dengan dua kondisi yang berbeda yakni filler tanpa pemanasan dan filler yang melibatkan pemanasan. Pada setiap kondisi, dilakukan variasi komposisi filler yang ditambahkan ke PVAc antara lain 1%, 3% dan 5%. Terkhusus untuk kondisi filler dengan pemanasan, filler dilarutkan dengan akuades dengan temperatur 70-80 °C serta kecepatan pengadukan 300 rpm selama 60 menit. Pencampuran PVAc dengan berbagai variasi komposisi filler pati dan kaolin dilakukan dengan kecepatan agitasi 300 rpm selama 60 menit. Pengujian kekuatan rekat sampel dilakukan berdasarkan ASTM D905-03 tentang uji kuat geser dan diperoleh hasil kekuatan rekat PVAc meningkat seiring penambahan filler pati dan kaolin hingga batas komposisi 3%, lalu untuk komposisi filler sebanyak 5% kekatan rekat yang dihasilkan menurun. Evaluasi beberapa parameter juga dilakukan dalam penelitian ini yang meliputi, pengukuran pH, densitas, viskositas, dan kandungan padatan (solid content). Beberapa metode karakterisasi juga dilakukan yakni FTIR, SEM dan PSA. Spektrum FTIR menunjukkan adanya kemiripan antara PVAc murni dan PVAc yang dilakukan penambahan filler, dengan adanya sedikit pergesaran serta penambahan spektrum dan intensitas puncak. Hasil SEM menunjukkan morfologi partikel filler pati dan kaolin yang tersebar dan mengisi pori matriks PVAc. Seiring penambahan komposisi filler, hasil PSA menunjukkan peningkatan ukuran rata-rata diameter partikel dari 2,12 μm hingga 6,29 μm.

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Polyvinyl Acetate (PVAc) has been studied to find out what happens when fillers like starch and kaolin are added to make the glue stronger. Filler were added in two different ways: with or without heat. In each condition, different amounts of filler were mixed into the PVAc, such as 1%, 3%, and 5%. For the filler condition with heating, the filler was mixed with distilled water at 70–80°C and 300 rpm for 60 minutes. The PVAc was mixed with different combinations of starch and kaolin filler at a speed of 300 rpm for 60 minutes. The shear strength test of the samples was carried out according to ASTM D905-03, and the results showed that adding starch and kaolin fillers increased the adhesive strength of PVAc up to a composition limit of 3%. After that, the adhesive strength actually went down at a composition limit of 5%. Several parameters, such as pH, density, viscosity, and solid content, were also measured as part of this study. FTIR, SEM, and PSA were also used to figure out what the material was like. With a small shift and spectrum addition, the FTIR spectrum shows that pure PVAc and PVAc with filler added are generally similar. The SEM results showed the shape of the starch and kaolin filler particles, which were scattered and filled the holes in the PVAc matrix. When more filler is added to PVAc, the PSA results show that the average particle size was increased from 2,12 µm to 6,29 µm. "

"Penelitian telah dilakukan untuk mengetahui pengaruh konsentrasi koloid pelindung Polivinil Alkohol (PVA) terhadap kekuatan daya rekat polimer emulsi Polivinil Asetat (PVAc). Sintesis polimerisasi emulsi dilakukan dengan teknik semi-kontinyu dengan komponen polimerisasi terdiri dari air, larutan PVA terhirolisis sebagian medium viscosity, dan surfaktan SDS. Sementara monomer Vinil Asetat (VAM) dan inisiator APS diberikan secara kontinyu selama proses sintesis berlangsung dengan temperature reaksi 70°C, kecepatan agitasi 300 rpm, dan waktu reaksi 5 jam dengan variasi konsentrasi larutan koloid pelindung PVA 2 wt%, 5 wt% dan 10 wt%. Kekuatan rekat polimer PVAc dilakukan dengan uji kuat geser terhadap kayu triplek mengikuti standar ASTM D905-03 dan diperoleh nilai shear strength PVAc meningkat seiring bertambahnya konsentrasi PVA sebesar 96, 225, 277, dan 421 kiloPascal. Parameter lain hasil akhir polimer juga dievaluasi dalam penelitian ini, meliputi temperatur reaksi, kandungan padatan, viskositas, nilai pH, dan densitas. Uji gugus fungsi pembentukan PVAc telah dilakukan dengan Spektrometer FTIR dan diketahui adanya gugus carbonyl C=O stretching & C=C stretching, dan gugus hydroxy O-H stretching. Ukuran partikel diuji dengan Dynamic Light Scattering PSA dan diperoleh ukuran 216 nm untuk PVAc tanpa koloid pelindung, sedangkan pada PVAc dengan koloid pelindung PVA berkisar antara 35-68,5 nm.

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Research has been conducted to determine the effect of the concentration of protective colloid Polyvinyl Alcohol (PVA) on the adhesive strength of Polyvinyl Acetate (PVAc) emulsion polymer. The synthesis of emulsion polymerization was carried out using a semi-continuous technique with polymerization components consisting of water, partially hydrolyzed PVA solution with medium viscosity, SDS surfactant. Meanwhile, Vinyl Acetate (VAM) monomer and APS initiator were administered continuously during the synthesis process with a reaction temperature of 70°C, agitation speed of 300 rpm, and a reaction time of 5 hours with variations in the concentration of the protective colloid PVA solution 2, 5 and 10% by weight. The adhesive strength of the PVAc polymer was carried out by a shear strength test against plywood following the ASTM D905-03 standard and the value of the shear strength of PVAc increased with the increase in PVA concentration of 96, 225, 277, and 421 kiloPascal. Other parameters of the final polymer yield were also investigated in this study, including reaction temperature, solids content, viscosity, pH value, and density. Function group test for PVAc formation has been carried out with an FTIR Spectrometer and it is known that there are carbonyl groups C=O stretching & C=C stretching, and hydroxy groups O-H stretching. The particle size was tested with Dynamic Light Scattering PSA and obtained a size of 216 nm for PVAc without a protective colloid, while for PVAc with a PVA protective colloid it ranged from 35-68.5 nm."