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Khairat, Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Engineering

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Pengaruh Waktu Dan Suhu Pencampuran Terhadap Derajat Grafting Maleated Natural Rubber Dengan Inisiator Benzoil Peroksida Zuliarti, Indah; Khairat, Khairat; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Maleated natural rubber is modification of natural rubber with grafting polar fungsional of maleic anhydride. This research aim to learning effect of the reaction temperature and reaction time modified MNR with benzoyl peroxide. Benzoyl peroxide was used to initiate the free radical graft copolymerization. Process produced Maleated Natural Rubber were modifed at internal mixer reaction temperature and reaction time, which are variated by 150o C, 155o C, 160o C, and 165o C of reaction temperature, and 8, 10, 12, 14 minutes of reaction time. Amount of MAH 8 phr and 60 rpm rotor rate of internal mixer. Quantities of the grafted anhydride (MA) were determined by titration of the methanol. Initiator benzoyl peroxide of the grafted anhydride on natural rubber relatif not effected. Increasing temperatur and time reaction also causes increasing levels grafting until point of optimum. The results showed the optimum temperature is 160oC and reaction time is 12 minutes. produced 4,75% grafting.Keywords : benzoyl peroxide, grafting , maleic anhydric, maleated natural rubber, temperature
Modifikasi Bioplastik Berbasis Pati Sagu Dengan Asam Sitrat Dan Filler Microcrystalline Cellulose (MCC) Oktaviani, Cindy; Khairat, Khairat; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bioplastic or biodegradable plastic is one of alternative replacement to conventional plastic that has the potential to harmful to the environment. One of the raw material that has the potential to be made into bioplastic is sago starch because it has ability to degraded. The general purpose of this research is to determine the characteristics of sago-based bioplastic by modified the citric acid, microcrystalline cellulose filler, plasticizer gliserol and create mathematical models of research parameters for bioplastics characteristics using statistical method. The synthesis method is casting of starch, water, filler MCC and plasticizer Glycerol with composition of filler is (15-25 % b/b), composition of plasticizer (25–35 % b/b), and composition citric acid (3-9 % b/b). The results showed that the treatment with the addition of MCC fillers, glycerol plasticizers, and citric acid are contributed to the mechanical properties produced. In the best process conditions (25% b / b MCC filler in 25% b / b glycerol plasticizer with 3% citric acid b / b) the best response value was obtained for the value of tensile strength of 9.34 MPa, elongation of 8.79%,and biodegradation of 65.68%. Keywords: bioplastics, cross-linking agents, MCC fillers, glycerol, sago starch
Pembuatan Komposit Pati Sagu/Polivinil Alkohol (PVA) Dengan Penambahan Kitosan Sebagai Filler Dan Gliserol Sebagai Plasticizer Deliana, Putri; Khairat, Khairat; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Sago-based bioplastics have weaknesses in low mechanical properties, so it is necessary to add synthetic plastics that are stronger but biodegradable and suitable fillers. This study aims to determine the effect of PVA, glycerol and chitosan on the mechanical and morphological properties of sago starch-based bioplastics. Bioplastics are made by intercalation of solutions,namely mixing sago starch, PVA, glycerol and chitosan. Testing samples include tensile strength, elongation, elastic modulus, tear strength, water uptake, biodegradability, and morphology. Data analysis using Response Surface Methodology (RSM) with the method used Central Composite Design (CCD). The results showed that starch starch/PVA levels, glycerol and chitosan greatly influenced the properties and morphology of sago starch-basededible film bioplastic products. The best process conditions were obtained from the ratio of sago starch/PVA 1/3 b/b, glycerol 0,06 ml/g of sago starch, 4% chitosan b/b composite, with tensile strength of 15,88 MPa, elongation of 10,29%, elastic modulus 138,09 MPa, tear strength 9,32 Kgf, water uptake 73,38% and biodegradability 75,25%. These results have met SNI tensile strength 13,7 MPa specifications for bioplastic products.Keywords : bioplastics, glycerol, chitosan, tensile strength, PVA
Co-Authors Bahruddin Bahruddin Deliana, Putri Oktaviani, Cindy Zuliarti, Indah