Cure Characteristics and Spectroscopic Studies of Silica Filled Epoxidised Natural Rubber Compound

2013 ◽  
Vol 844 ◽  
pp. 225-228
Author(s):  
Mazlina Mustapha Kamal ◽  
Rohani Abu Bakar
Keyword(s):  
Fourier Transform ◽  
Natural Rubber ◽  
Chemical Interaction ◽  
Spectroscopic Studies ◽  
The Other ◽  
Rubber Compound ◽  
Precipitated Silica ◽  
Profound Influence ◽  
Polymer Filler ◽  
Infra Red

Reinforcement of rubber by precipitated silica is adversely affected due to lack of strong polymer filler bonding1-2. The surface energy of fillers play an important role in the reinforcement of rubbers and has a profound influence on the performance of rubber products3. Functionalised polymers interact strongly with surface silanol groups of precipitated silica. In this work, the unique reinforcement mechanism exhibited by silica in Epoxidised Natural Rubber (ENR) is established through rheometric and Fourier Transform Infrared Spectroscopic (FTIR) study. A rheometer torque rise was detected with an ENR compound silica in the absence of any curing agent. On the other hand, the extent of the interaction increased with the increment of epoxidation level. Fourier transform infra red spectroscopic studies showed silica is bonded to ENR through formation of Si-O-C bond and the extent of the chemical interaction depends on the moulding time4.

scholarly journals PENGARUH BIODEGRADASI DENGAN TEKNIK PENANAMAN TERHADAP PRODUK LATEKS KARET ALAM BERPENGISI TEPUNG KULIT PISANG YANG DIPUTIHKAN DENGAN HIDROGEN PEROKSIDA

2012 ◽  
Vol 1 (2) ◽  
pp. 11-15
Author(s):  
Erick Kamil ◽  
Emelya Khoesoema ◽  
Hamidah Harahap
Keyword(s):  
Weight Loss ◽  
Fourier Transform ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
The Other ◽  
Rubber Latex ◽  
Soil Burial ◽  
Loss Calculation ◽  
Structure Changes ◽  
Npk Fertilizer

Natural rubber latex products filled with bleached banana skin powder were identified by burying samples in soil. Soil burial was carried out by adding NPK fertilizer and without fertilizer. One of the tests which was carried out was weight loss calculation. Weight loss calculation showed that natural rubber latex products filled with bleached banana skin powder biodegraded faster than natural rubber latex products without filler. The addition of fertilizer also contributed to biodegradability of samples. The other test was FTIR (Fourier Transform Infrared Spectroscopy) test. The results of FTIR test showed there were structure changes in natural rubber latex which indicated natural rubber latex had been biodegraded.

Spectroscopic Studies of Cholesterol: Fourier Transform Infra-Red and Vibrational Frequency Analysis

2014 ◽  
Vol 3 (3) ◽  
pp. 211-217 ◽  
Author(s):  
Ujval Gupta ◽  
VivekK. Singh ◽  
Vinay Kumar ◽  
Yugal Khajuria
Keyword(s):  
Fourier Transform ◽  
Frequency Analysis ◽  
Vibrational Frequency ◽  
Spectroscopic Studies ◽  
Infra Red

Effect of Leaching Treatment on Mechanical Properties of Natural Rubber Latex (NRL) Products Filled Modified Kaolin

2014 ◽  
Vol 548-549 ◽  
pp. 90-95 ◽  
Author(s):  
Hamidah Harahap ◽  
Elmer Surya ◽  
Indra Surya ◽  
Hanafi Ismail ◽  
Baharin Azahari
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Infra Red ◽  
Scanning Electron

In this study, an effect of leaching treatment on the mechanical properties of natural rubber latex (NRL) products was investigated. The products were prepared by compounding the NRL dispersion system with modified kaolin as fillers then it was formed by dipping method. It was found that incorporation of fillers in NRL would result in lowering mechanical properties of vulcanizates when the leaching was performed. The results were confirmed further by characterization of Fourier-Transform Infra-Red (FTIR) and Scanning Electron Microscopy (SEM).

scholarly journals REINFORCEMENT OF NATURAL RUBBER BY PRECIPITATED SILICA: THE INFLUENCE OF PROCESSING TEMPERATURE

2014 ◽  
Vol 87 (1) ◽  
pp. 103-119 ◽  
Author(s):  
S. Salina Sarkawi ◽  
Wilma K. Dierkes ◽  
Jacques W. M. Noordermeer
Keyword(s):  
Natural Rubber ◽  
Coupling Agent ◽  
Thermal History ◽  
Silane Coupling Agent ◽  
The Other ◽  
Processing Temperature ◽  
Precipitated Silica ◽  
Bound Rubber ◽  
Silane Coupling ◽  
Deproteinized Natural Rubber

ABSTRACT The thermal history, and in particular the mixing dump temperature, is a parameter of paramount importance in mixing rubber and silica with a silane coupling agent in order to achieve proper silanization of silica and to avoid premature scorch reactions. The influence of the mixing dump temperature on the performance of silica-reinforced natural rubber (NR) is investigated. The investigation also includes the effect of nonrubber constituents, primarily proteins in NR, by using deproteinized natural rubber (DPNR) and synthetic polyisoprene (IR). The vulcanization properties and rubber-to-filler interactions of silica-reinforced NR in the presence and absence of a silane coupling agent are highlighted. With increasing mixing dump temperature, the silanization reaction between silica and silane coupling agent proceeds further. At a sufficiently high dump temperature, filler–filler interactions in the NR–silica compounds are reduced and the silica–rubber interaction improved, as evidenced by a drop in the Payne effect and increment in chemically bound rubber. It is demonstrated that NR and IR compounds mixed until they are above the optimum dump temperature exhibit cure reversion and reduction in tensile properties. On the other hand, DPNR–silica vulcanizates show slightly more constant physical properties.

scholarly journals FORMULATION OF SLOW-RELEASE NPK DOUBLE- COATED GRANULES USING BIOBLEND POLYMER BY SPRAY

2018 ◽  
Vol 49 (6) ◽  
Author(s):  
Djamaan & et al.
Keyword(s):  
Fourier Transform ◽  
Slow Release ◽  
Chemical Interaction ◽  
Release Profile ◽  
Coating Process ◽  
Infra Red ◽  
Sem Micrograph ◽  
Interaction Surface ◽  
Coated Granules ◽  
Scanning Electron

The slow-release NPK double-coated granules obtained was evaluated in term of chemical interaction, surface morphology, and release rate of phosphate by Fourier Transform Infra Red spectrophotometer, Scanning Electron Microscope, and Visible spectrophotometer. Results showed that the FTIR spectrum of granules showed that no chemical interaction was observed between NPK granules and coating polymers during the coating process. The bioblend polymer used was effective as a coating materialfor the slow-release double-coated NPK. The SEM micrograph showed the clearly different part between core and coating polymers. The percentage of phosphate released after 48 hours through the slow-release double and one coated NPK granules were 21.89, and 39.13%, respectively. While through un-coated NPK granules was 93.60%. The release profile of phosphate through slow release double coatedNPK granules was following the Langenbucher kinetics (r = 0.9015).

PEMBUATAN DAN KARAKTERISASI SERAT HOLLOW DARI SELULOSA BAKTERIAL DENGAN NANOPARTIKEL ZnO UNTUK PENGOLAHAN AIR LIMBAH TEKSTIL

Arena Tekstil ◽  
2014 ◽  
Vol 29 (1) ◽  
Author(s):  
Rizka Yulina ◽  
Srie Gustiani ◽  
Wulan Septiani
Keyword(s):  
Fourier Transform ◽  
Acetobacter Xylinum ◽  
Wet Spinning ◽  
Ph Optimum ◽  
Infra Red ◽  
Remazol Black

Selulosa bakterial mempunyai sifat mekanik yang baik untuk digunakan sebagai membran pada proses pengolahan air limbah tekstil. Pada penelitian ini dilakukan pembuatan dan karakterisasi serat hollow dari bahan baku selulosa bakterial nata de coco dengan penambahan nanopartikel ZnO sebagai fotokatalis terimmobilisasi. Selulosa bakterial disintesis menggunakan bakteri Acetobacter xylinum di dalam medium air kelapa dan gula. Selulosa bakterial dilarutkan bersama dengan nanopartikel ZnO menggunakan pelarut cuprietilen diamina (Cuen) dengan variasi selulosa bakterial 2,25% dan 2,50%. Serat berbentuk hollow dihasilkan dari proses wet spinning menggunakan koagulan NaOH. Serat hollow yang telah melalui koagulan kemudian direndam dalam larutan asam, gliserol, dan alkohol, dengan variasi waktu perendaman asam selama 1 dan 2 hari. Uji kekuatan tarik menunjukkan hasil yang terbaik yakni sebesar 815,72 gf pada konsentrasi selulosa bakterial 2,50% dan perendaman asam selama 2 hari. Dari hasil uji gugus fungsi menggunakan spektroskopi Fourier Transform Infra Red (FTIR), terdapat beberapa gugus fungsi yang menunjukkan keberadaan selulosa dan nanopartikel ZnO. Proses dekolorisasi fotokatalitik terhadap air limbah tekstil artifisial yang mengandung zat warna reaktif Remazol Black 5 (RB5) menunjukkan bahwa pH optimum proses penyisihan warna yakni pada pH 9 dan dihasilkan persen penyisihan warna yang tertinggi yaitu 90,32%. Pada kondisi yang sama, proses dekolorisasi RB5 menggunakan serat hollow tanpa nanopatikel ZnO hanya menghasilkan persen penyisihan warna sebesar 32,10%. Berdasarkan laju penyisihan zat warna, aktivitas degradasi fotokatalitik terbesar (k’ = 0,2615) diperoleh pada konsentrasi ZnO 10% dan konsentrasi zat warna RB5 10 ppm.

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