A novel vegetable oil nanoemulsion-plasticized natural rubber latex compound: Effect of ingredient blending sequence on crosslink density and tensile strengths

2018 ◽  
Author(s):  
Siang Yin Lee ◽  
Fauzi Mohd Som ◽  
Amir Hashim Md Yatim ◽  
Yi Xin Heng ◽  
Yvonne Tze Qzian Ling
Keyword(s):  
Natural Rubber ◽  
Vegetable Oil ◽  
Crosslink Density ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Blending Sequence ◽  
Compound Effect

Effect of Drying Time on Mechanical Properties of Natural Rubber Products Filled with Modified Kaolin Prepared from Latex Dipping

2015 ◽  
Vol 1123 ◽  
pp. 352-355 ◽  
Author(s):  
Hamidah Harahap ◽  
Elmer Surya ◽  
Indra Surya ◽  
Baharin Azahari ◽  
Hanafi Ismail
Keyword(s):  
Natural Rubber ◽  
Crosslink Density ◽  
Natural Rubber Latex ◽  
Tensile Modulus ◽  
Rubber Latex ◽  
Drying Time ◽  
Elongation At Break ◽  
Study Results ◽  
Sem Micrograph ◽  
Additional Formation

Alkanolamide-modifed kaolin was added into natural rubber latex (NRL) pre-vulcanization system at 70°C and the products were formed into films by coagulant dipping method. The dipped films then were dried at 120°C for 15 and 30 min. The effect of drying time on properties of NRL films such as crosslink density, tensile strength, tensile modulus, and elongation at break was observed in this study. Results showed that longer drying time improved the properties of NRL films due to the additional formation of crosslink process in the NRL films. The longer drying time swelled the particles more in matrix as confirmed by Scanning Electron Microscopy (SEM) micrograph.

Influence of Modified Cassava Peel Waste (CPW) Loading on Tensile Properties of Natural Rubber Latex (NRL) Products

2015 ◽  
Vol 1119 ◽  
pp. 342-346
Author(s):  
Hamidah Harahap ◽  
Kelvin Hadinatan ◽  
Adrian Hartanto ◽  
Elmer Surya ◽  
Indra Surya ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Natural Rubber Latex ◽  
Tensile Modulus ◽  
Rubber Matrix ◽  
Tensile Fracture ◽  
Rubber Latex ◽  
Elongation At Break ◽  
Cassava Peel

Cassava peel is one of agricultural waste that abundantly found in environment. One approach to manage this waste is to apply it as filler in natural rubber latex. In this work, the cassava peel waste (CPW) was powdered and dispersed in alkanolamide-water dispersion system to modify its surface. The amount of fillers used was 0, 5, 10, 15, 20 and 25 phr (part per hundred rubber) and loaded in natural rubber latex (NRL) formulation system. The products then were formed by dipping method after the NRL formulation was pre-vulcanized at 70°C. The observed parameter includes crosslink density, tensile strength, tensile modulus and elongation at break. Scanning Electron Microscope (SEM) was used to study the morphology of tensile fracture in NRL film. The results show that 10 phr loading of modified fillers increases the crosslink density, tensile strength, and tensile modulus but decreases the elongation at break. SEM study also reveals that higher filler loading above 10 phr will create the agglomeration in rubber matrix.

Physicochemical and antimicrobial properties of natural rubber latex films in the presence of vegetable oil microemulsions

2017 ◽  
Vol 134 (18) ◽  
Author(s):  
Siang Yin Lee ◽  
Angie Ng ◽  
Manroshan Singh Jaswan Singh ◽  
Yun Khoon Liew ◽  
Seng Neon Gan ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Vegetable Oil ◽  
Natural Rubber Latex ◽  
Antimicrobial Properties ◽  
Latex Films ◽  
Rubber Latex

scholarly journals PENGARUH SUHU VULKANISASI DAN KOMPOSISI BENTONITE CLAY YANG DIMODIFIKASI DENGAN ALKANOLAMIDA DARI BAHAN BAKU RBDPKO PADA PRODUK LATEKS KARET ALAM

2015 ◽  
Vol 4 (4) ◽  
pp. 64-70
Author(s):  
Friska Erdiana Tambunan ◽  
Hamidah Harahap
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Palm Kernel ◽  
Natural Rubber Latex ◽  
Bentonite Clay ◽  
Filler Loading ◽  
Rubber Latex ◽  
Ftir Characterization ◽  
Amidation Reaction

The is research aims to determine the effect of vulcanization temperature and composition of bentonite clay as good filler on mechanical properties of natural rubber latex product. In this study, we use bentonite clay as filler and alkanolamide as compatibilizer. The material used in this study are high ammonia latex 60%, curative agents such as sulfur, ZnO, ZDEC, AO, KOH, bentonite clay and alkanolamide. Alkanolamide is synthesized from amidation reaction between Refined Bleached Deodorized Palm Kernel Oil and diethanolamine. The methodology includes pre-vulcanizing natural rubber latex with certain formulation, then vulcanized using dipping method. The variable used in this study is filler loading, from 5, 10, 15, 20, and 25 gram, and vulcanization time 10 minutes.  The products were then tested in order to observe its mechanical properties, FTIR characterization, SEM characterization and crosslink density. The results show that the synthesized alkanolamide possess the functional group desired. Alkanolamide modified bentonite clay loading is capable of increasing crosslink density and mechanical properties of the products. Optimum filler loading is reported on 10 gram and optimum vulcanization at 120oC.

Natural rubber latex film in the presence of renewable vegetable oil nanoemulsion

2020 ◽  
Author(s):  
Yi Xin Heng ◽  
Yvonne Tze Qzian Ling ◽  
Siang Yin Lee ◽  
Desmond Teck Chye Ang ◽  
Seng Neon Gan
Keyword(s):  
Natural Rubber ◽  
Vegetable Oil ◽  
Natural Rubber Latex ◽  
Latex Film ◽  
Rubber Latex

The Microstructure of Natural Rubber Latex Films

1997 ◽  
Vol 70 (4) ◽  
pp. 549-559 ◽  
Author(s):  
S. Cook ◽  
P. E. F. Cudby ◽  
R. T. Davies ◽  
M. D. Morris
Keyword(s):  
Electron Microscopy ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Osmium Tetroxide ◽  
Natural Rubber Latex ◽  
Mesh Size ◽  
Latex Film ◽  
Rubber Latex ◽  
Microscopy Technique ◽  
Transmission Electron

Abstract An electron microscopy technique which has been used to visualize the crosslinked regions in vulcanized blends of dry rubber has now been applied to films made from natural rubber (NR) latex. The method involves swelling the latex film with styrene, polymerizing the styrene, sectioning the sample and then staining with osmium tetroxide to reveal the rubber network when observed by transmission electron microscopy (TEM). The micrographs show the higher ratio of interparticle to intraparticle crosslinks in a sulphur post-vulcanized film as compared with a sulphur prevulcanized film. They also show that, as in dry rubber films, the mesh size of the visible rubber network correlates with the crosslink density of the rubber. The technique also reveals that the crosslink distribution in peroxide prevulcanized latex (PPVL) is significantly different from that in latices prevulcanized using sulphur or radiation.

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