Isananto Winursito, Isananto
Balai Riset dan Standardisasi Industri Padang

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Biodegradable and water-soluble polycarboxylates derived from starch

Majalah Kulit, Karet, dan Plastik Vol 28, No 1 (2012): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

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Abstract

abstractThis research present electrical and thermal properties of the Nano composite high density poly Utilizationof natural resources, like polysaccharide, as a raw material for the preparation of biodegradable andfunctional polymer was studied. Partially dicarboxylated polysaccharides were prepared using starch fromcorn, sago and tapioca, and comparison was made of their biodegradability, hydrolytic degradability andcalcium ion sequestration capacity. The biodegradability of dicarboxylated starch sodium salt (DC-starch)depended on the dicarboxylation degree. DC-starch containing more than 75-85 mol% of unreactedglucopyranose groups in the polymer chain showed excellent biodegradation. DC-starch with highdicarboxylation degree was resistant to biodegradation but showed good calcium ion sequestration.Among DC-starches from corn, sago and tapioca starches, hydrolytic degradability and calcium ionsequestration performance were essentially the same.Keywords: biodegradation, dicarboxylated starch, polycarboxylate, water-soluble polymer.

Pengaruh penerapan teknologi vakum dan non-vakum terhadap umur simpan pangan berminyak

Majalah Kulit, Karet, dan Plastik Vol 21, No 1 (2005): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

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Abstract

Research about the application of vaccum and non vacuum technology for the storage of greasy food using two types of polyethylene (0. Mm) and bilayer (polyethylene and nylon 0.09 mm) was carried out. The objective of the research was to know the influence of packaging for technology storage of greasy foods (sambel pecel). The result showed that water vapour permeability of bilayer was lower than of polyethylene and the score was 1.72 mg/24 hours for polyethylene and 1.58 mg/24 hours bilayer. Water activity (aw) after 60 days storage was 0.43-0.56. while the score of peroxide value of greasy foods packed using non vacuum technology was 10.18-24.98 mg Fe2+ and the score of greasy foods (sambel pecel) using vacuum technology was 10.18-17.48 mg Fe2+ and the score of greasy foods (sambel pecel) using vacuum technology was 10.18-17.48 mg Fe2. Sensories evaluation of greasy foods indicated with bilayer and vacuum technology gave high score. Key words: greasy food, vacuum, non vacuum, polyethylene, bilayer plastic. ABSTRAKPenelitian mengenai penerapan teknologi vakum dan non vakum terhadap umur simpan pangan berminyak (sambel pecel) menggunakan bahan polietilen (0,1 mm) dan bilayer (0,09 mm). tujuan penelitian ini untuk mengetahui pengaruh teknologi pengemasan terhadap umur simpan pangan berminyak (sambel pecel). Hasil penelitian menunjukkan bahwa permeabilitas terhadap uap air bilayer lebih rendah dari polietilen dan nilainya adalah polietilen 1,72 mg/24 jam dan bilayer 1,58 mg/24 jam. Aktivitas air setelah disimpan 60 hari adalah 0,43-0,56. Nilai peroksida dari sambel pecel yang dikemas non vakum adalah 10,18-24,98 mg Fe2 dan untuk vakum 10,18-17,48 mg Fe2. Hasil evaluasi uji sensoris menunjukkan bahwa sambel pecel yang dikemas dengan bilayer dan vakum teknologi memperoleh nilai tinggi.Kata kunci: sambel pecel, vakum, non vakum, polietilen, plastic dua lapis.

Poliester tak jenuh sebagai bahan baku pembuatan helm pengaman

Majalah Kulit, Karet, dan Plastik Vol 19, No 1 (2003): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

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Abstract

Unsaturated polyester is applied in many products such as aircraft sections, boats, building, panels, automotive accessories and modifications, etc. In this  research, unsaturated polyester was used as a raw material, which was reinforced with a fiberglass mat, and casted in a silicon rubber mold. The concentrations of methyl ethyl ketone peroxide (1-3 phr) as an initiator and cobalt naphtanate (0-2 phr) as an accelerator were used in the preparation of safety helmet. Subsequently, the effects of the compounds to the reaction time, the brittleness of the products, an the physical properties, were studied. The results showed  that the compound composed by 100 phr unsaturated polyester, 2 phr methyl ethyl ketone peroxide, 2 phr cobalt naphtanate, 40 phr silica, 20 phr fiberglass mat and 1 phr pigment was not brittle, had a good reaction time and nonflammable, gave 4.82 mm in resistance to penetration, and the deflection of A and B were 4.5 and 0.0 mm, respectively.  Keywords : unsaturated polyester, safety helmet, methyl ethyl ketone peroxide, cobalt-naphtenate.

Deterjensi Dari Sagu dan Asam Alginat Terdikarboksilasi yang Biodegradabel

Jurnal Riset Teknologi Industri Vol 7 No 14 Desember 2013
Publisher : Balai Riset dan Standardisasi Industri Samarinda

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Abstract

Sago and alginic acid were partially-dicarboxylated and used as an alternative for substitution of sodium tripolyphosphate (STPP) which cause eutrophication in water body. Dicarboxylated sago and alginic acid (ST and AT) with degree of dicarboxylations from 10 to 81 mol% were prepared, and their builder performance in detergent formulation (as relative detergency and calcium ion sequestration capacity), and biodegradabbility were measured. The detergency and calcium ion sequestration capacity of ST and AT depended on the degree of dicarboxylation. AT with degree of dicarboxylations more than 58-60 mol% showed excellent builder performance in detergent formulations based on the detergency and calcium ion sequestration capacity. On the other hand, ST with degree of dicarboxylations more than 25 mol% showed better in biodegradability than AT at the same basis. However, AT with degree of dicarboxylations more than 50 mol% was resistent to biodegradation

Stabilitas emulsi kopolimer S-GMA (stirena – glisidil metakrilat)

Majalah Kulit, Karet, dan Plastik Vol 8, No 14 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

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Abstract

Epoxy groups in glycidyl methacrylate (GMA) units have been available for the reaction with amine of proteins or other biological active substrates to prepare biomaterials and hybrid devices. Soap-soap copolymerization of GMA with styrene (S) result the formation of stable latex. Hydrolysis of epoxy groups in copolymer particles increased emulsion stability. The effect of pH, temperature and reaction time in the hydrolysis of S-GMA copolymer have been investigated.   INTISARI Gugus epoksi dalam glisidil matakrilat (GMA) dapat digunakan untuk mengikat gugus amina pada protein atau substrat aktif biologi untuk menyiapan suatu biomaterial dan peralatan hibrida. Kopolimerisasi GMA dengan stirena (S) tanpa menggunakan pengemulsi dapat menghasilkan la teks yang stabil. Hidrolisa gugus epoksi dalam partikel kompolimer ini menaikkan stabilitas emulsi. Pada penelitian ini telah dipelajari pengaruh pH, suhu dan waktu reaksi dalam hidrolisa kopolimer S-GMA.

Stabilitas emulsi kopolimer S-GMA (stirena – glisidil metakrilat)

Majalah Kulit, Karet, dan Plastik Vol 8, No 14 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1295.201 KB)

Abstract

Epoxy groups in glycidyl methacrylate (GMA) units have been available for the reaction with amine of proteins or other biological active substrates to prepare biomaterials and hybrid devices. Soap-soap copolymerization of GMA with styrene (S) result the formation of stable latex. Hydrolysis of epoxy groups in copolymer particles increased emulsion stability. The effect of pH, temperature and reaction time in the hydrolysis of S-GMA copolymer have been investigated.   INTISARI Gugus epoksi dalam glisidil matakrilat (GMA) dapat digunakan untuk mengikat gugus amina pada protein atau substrat aktif biologi untuk menyiapan suatu biomaterial dan peralatan hibrida. Kopolimerisasi GMA dengan stirena (S) tanpa menggunakan pengemulsi dapat menghasilkan la teks yang stabil. Hidrolisa gugus epoksi dalam partikel kompolimer ini menaikkan stabilitas emulsi. Pada penelitian ini telah dipelajari pengaruh pH, suhu dan waktu reaksi dalam hidrolisa kopolimer S-GMA.

Poliester tak jenuh sebagai bahan baku pembuatan helm pengaman

Majalah Kulit, Karet, dan Plastik Vol 19, No 1 (2003): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1838.015 KB)

Abstract

Unsaturated polyester is applied in many products such as aircraft sections, boats, building, panels, automotive accessories and modifications, etc. In this  research, unsaturated polyester was used as a raw material, which was reinforced with a fiberglass mat, and casted in a silicon rubber mold. The concentrations of methyl ethyl ketone peroxide (1-3 phr) as an initiator and cobalt naphtanate (0-2 phr) as an accelerator were used in the preparation of safety helmet. Subsequently, the effects of the compounds to the reaction time, the brittleness of the products, an the physical properties, were studied. The results showed  that the compound composed by 100 phr unsaturated polyester, 2 phr methyl ethyl ketone peroxide, 2 phr cobalt naphtanate, 40 phr silica, 20 phr fiberglass mat and 1 phr pigment was not brittle, had a good reaction time and nonflammable, gave 4.82 mm in resistance to penetration, and the deflection of A and B were 4.5 and 0.0 mm, respectively.  Keywords : unsaturated polyester, safety helmet, methyl ethyl ketone peroxide, cobalt-naphtenate.