scholarly journals Graft-Copolymerization of Acrylonitrile onto Surfaces of Natural Rubber Particles Using Deproteinized Natural Rubber Latex

2007 ◽  
Vol 64 (3) ◽  
pp. 155-160 ◽  
Author(s):  
Yoshimasa YAMAMOTO ◽  
Takumi SAWADA ◽  
Seiichi KAWAHARA
Keyword(s):  
Natural Rubber ◽  
Graft Copolymerization ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Rubber Particles ◽  
Deproteinized Natural Rubber

Novel membranes from physico-chemically modified deproteinized natural rubber latex: development, characterisation and drug permeation

2018 ◽  
Vol 42 (17) ◽  
pp. 14179-14187
Author(s):  
Janisha Jayadevan ◽  
G. Unnikrishnan
Keyword(s):  
Drug Release ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Drug Permeation ◽  
Chemically Modified ◽  
Blend Membranes ◽  
Deproteinized Natural Rubber

Novel blend membranes from physico-chemically modified deproteinized natural rubber latex for drug release applications.

Surface modification of natural rubber latex films by graft copolymerization

2000 ◽  
Vol 36 (7) ◽  
pp. 1323-1331 ◽  
Author(s):  
Peng Wang ◽  
K.L Tan ◽  
C.C Ho ◽  
M.C Khew ◽  
E.T Kang
Keyword(s):  
Surface Modification ◽  
Natural Rubber ◽  
Graft Copolymerization ◽  
Natural Rubber Latex ◽  
Latex Films ◽  
Rubber Latex

Development of latex foam pillows from deproteinized natural rubber latex

2021 ◽  
Author(s):  
Roslim Ramli ◽  
Ai Bao Chai ◽  
Shamsul Kamaruddin ◽  
Jee Hou Ho ◽  
Fatimah Rubaizah Mohd. Rasdi ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Deproteinized Natural Rubber

Deproteinized Natural Rubber as Chewing Gum Base for Nicotine Delivery

2013 ◽  
Vol 844 ◽  
pp. 470-473
Author(s):  
Wiwat Pichayakorn ◽  
Prapaporn Boonme ◽  
Wirach Taweepreda
Keyword(s):  
Natural Rubber ◽  
Room Temperature ◽  
Natural Rubber Latex ◽  
Sodium Carboxymethylcellulose ◽  
Rubber Latex ◽  
Initial Modulus ◽  
Chewing Gums ◽  
Significant Difference ◽  
Saccharin Sodium ◽  
Deproteinized Natural Rubber

This study aimed to prepare the nicotine chewing gums for smoking cessation using deproteinized natural rubber latex (DNRL) as gum bases due to its highly flexible property. The formulations were produced by the conventional heat melting and kneading methods. The experimental design was used to obtain the optimum 3 gum base formulations. Each formulation composed of olive oil as a plasticizer; sodium carboxymethylcellulose as an adsorbent; xylitol, mannitol and saccharin sodium as sweeteners instead of sugar. Gum base 1 and gum base 2 had the same sweetener amount but gum base 2 had the lower plasticizer amount, while gum base 1 and gum base 3 had the same plasticizer amount but different sweetener amount. Nicotine was added into each 3 gum bases (NCT1-3). The results showed no significant difference of appearance and taste. Their physicochemical properties were as following: pH of 8.45, 8.46, 8.54, hardness of 39.80, 36.28, 33.14 Shore A, initial modulus of 0.090, 1.260, 0.065 MPa, %elongation of 286, 403, 489%, drug content of 63.62, 70.95, 72.70%, and drug release when 500 times for force clamping of 48.72, 45.72, 67.74%, respectively. After storage at room temperature for 1 month, NCT1 and NCT2 showed unchangeable appearance, but NCT3 showed the slightly liquefied film and much sticky due to hygroscopic property of its sweetener. However, all formulations showed the significant reduction of drug amount which should be further improved in their stability properties.

The Polymerization of Vinyl Monomers in Natural-Rubber Latex

1956 ◽  
Vol 29 (4) ◽  
pp. 1119-1126 ◽  
Author(s):  
George F. Bloomfield ◽  
P. McL. Swift
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Vinyl Monomers ◽  
Rubber Latex ◽  
Dispersing Agent ◽  
Rubber Particles ◽  
Surface Active ◽  
Active Substances

Abstract Practical methods are described for polymerizing methacrylic esters, styrene, and other vinyl monomers in natural-rubber latex. The larger rubber particles require an appreciable time to attain equilibrium with the monomer diffusing into them from a liquid monomer phase dispersed in the serum. Provided that substantial proportions of added surface-active substances are avoided, rubber-soluble monomers can be polymerized almost entirely within the rubber particles, and the modified latex then contains no separately emulsified free polymer. Such conditions favor combination of polymer with rubber. The addition of a sufficiently large amount of dispersing agent favors polymerization of emulsified monomer, with less involvement of the rubber. In this way there can be obtained mixtures of rubber and polymer from monomers whose polymerization is otherwise inhibited by the presence of polyisoprene hydrocarbons.

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