Effect of Poly (Butyl Acrylate) and Poly (Ethylene Oxide) Modified Sago Starch on Natural Rubber Latex Films Physical Properties

2015 ◽  
Vol 754-755 ◽  
pp. 261-265
Author(s):  
M.M. Afiq ◽  
N.T. Sean ◽  
A. Rashid Azura
Keyword(s):  
Ethylene Oxide ◽  
Natural Rubber ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Rubber Matrix ◽  
Sago Starch ◽  
Rubber Latex ◽  
Packed Structure ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Sago starch is modified with 1 wt % Poly butyl acrylate (PBA) and Poly ethylene oxide (PEO) monomer and 1 wt% of initiator, potassium persulfate (PPS) at temperature 80°C for 2 hours. Modified sago starch is cooled under room temperature for 24 hours prior to Natural Rubber Latex (NRL) compounding process. Results indicates that NRL films with PBA modified sago starch have higher mechanical properties compared to PEO modified sago starch and unmodified sago starch. Swelling test indicates that PEO gives lowest percentage of swelling and crosslink density. This is due to higher reaction probability that produce more closely packed structure with NRL matrix compared to PBA which only improved the compatibility of sago starch particle with rubber matrix. Thus, chemically modified sago starches are preferable to be used as fillers to produce better interaction between fillers and rubber matrix.

Thermal Properties and Morphology of Compatible Poly(ethylene oxide)/Natural Rubber-graft -poly(methyl methacrylate) Blends

2018 ◽  
Vol 382 (1) ◽  
pp. 1800083 ◽  
Author(s):  
Nurul F. A. Zainal ◽  
Margarethe Hein ◽  
Volker Abetz ◽  
Ab M. M. Ali ◽  
Chin H. Chan
Keyword(s):  
Thermal Properties ◽  
Ethylene Oxide ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Characterization and properties of amphiphilic block polymer based on poly(ethylene oxide) and poly(butyl acrylate)

2003 ◽  
Vol 89 (13) ◽  
pp. 3432-3436 ◽  
Author(s):  
Caiqi Wang ◽  
Guo Zhang ◽  
Zhihao Zhang ◽  
Xinfang Chen ◽  
Xinyi Tang ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Butyl Acrylate ◽  
Block Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Preparation, Adhesive Performance and Stability of Natural Rubber Latex Grafted with N-Butyl Acrylate (BA) and Methyl Methacrylate (MMA)

2008 ◽  
Vol 47-50 ◽  
pp. 1149-1152 ◽  
Author(s):  
Pranee Chumsamrong ◽  
Jakkarin Mondobyai
Keyword(s):  
Shear Strength ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Peel Strength ◽  
Rubber Latex ◽  
Weight Percentage ◽  
Monomer Ratio ◽  
Lap Shear

In order to study the potential of increasing the weather stability of natural rubber latex for use as a water-based contact adhesive, the natural rubber latex was modified by graft copolymerization with n-butyl acrylate (BA) and methyl methacrylate (MMA). The grafting reaction was carried out using emulsion polymerization at 60°C. Potassium persulfate was used to initiate polymerization. Four different weight percentage ratios of BA to MMA used in this work were 80:20, 70:30, 60:40 and 50:50. Percentage conversion of the monomer of all latexes prepared was ≥ 79.8 %. The grafting efficiency of grafted natural rubber latexes with a different monomer ratio tended to decrease with an increase of MMA. The adhesion property was characterized by 90° peel strength and 180° lap shear tests. The shear strength value of grafted natural rubber latexes increased with an increase of MMA content. The grafted latex with the monomer ratio of 50:50 possessed higher shear strength than natural rubber latex. The peel strength value of grafted natural rubber latexes seemed to lower than that of natural rubber latex. The weather stability of the modified latex was characterized using thermogravimetric analysis (TGA) and also the peel samples were left in the open air for 45 days before testing. The results showed that grafted natural rubber latex had a higher weather stability than natural rubber latex.

Characterizing Mechanical Properties of Peroxide-Vulcanized Natural Rubber Latex Films

2015 ◽  
Vol 1134 ◽  
pp. 236-242 ◽  
Author(s):  
Roslim Ramli ◽  
Jefri Jaapar ◽  
Manroshan Singh Jaswan Singh ◽  
Siti Noor Suzila Maqsood Ul Haque ◽  
Amir Hashim Md Yatim
Keyword(s):  
Free Radicals ◽  
Natural Rubber ◽  
Polymer Network ◽  
Natural Rubber Latex ◽  
High Strength ◽  
Barrier Properties ◽  
Organic Peroxide ◽  
Polymer Chains ◽  
Rubber Matrix ◽  
Rubber Latex

Natural rubber latex is the material of choice for the fabrication of thin elastic films in many products such as gloves and condoms owing to its high strength, elasticity, comfort in use, good barrier properties and ‘green image’ [1, 2]. This unique combination of characteristics has its origins in the intrinsic properties of the crosslinked polymer network within the rubber matrix. The crosslinking of rubber hydrocarbon chains by free radicals generated from peroxide has been discovered for many years [3]. In peroxide crosslinking reactions, organic peroxide decomposes to produce reactive free radicals that will react to release hydrogen ions from the carbon hydrogen in the polymer chain, encouraging formation of free radicals on the rubber molecular chains. As the free radicals react with the polymer chains, the carbon hydrogen in the chains act as reactive centre that combines with centres of other rubber chains to form a network of carbon to carbon bonds which serve as crosslinks [3, 4].

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