Preparation of Deproteinized Natural Rubber Latex and Properties of Films Formed by Itself and Several Adhesive Polymer Blends

2012 ◽  
Vol 51 (41) ◽  
pp. 13393-13404 ◽  
Author(s):  
Wiwat Pichayakorn ◽  
Jirapornchai Suksaeree ◽  
Prapaporn Boonme ◽  
Wirach Taweepreda ◽  
Garnpimol C. Ritthidej
Keyword(s):  
Natural Rubber ◽  
Polymer Blends ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
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.

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.

scholarly journals Novel Deproteinized Natural Rubber Latex Adhesive Used in Extraoral Maxillofacial Prostheses

2021 ◽  
Vol 50 (11) ◽  
pp. 3383-3394
Author(s):  
Paweena Kongkon ◽  
Wiwat Pichayakorn ◽  
Sasiwimol Sanohkan
Keyword(s):  
Bond Strength ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Control Group ◽  
Rubber Latex ◽  
Factor Ii ◽  
Biocompatibility Testing ◽  
Silicone Prostheses ◽  
Deproteinized Natural Rubber ◽  
Scanning Electron

This study aimed to develop an adhesive for silicone maxillofacial prostheses and compared the properties with the Daro adhesive hydrobond (Factor II, Inc, Lakeside, AZ, USA). Two adhesives were developed from non-vulcanized natural rubber-based adhesives (Adhesive A) and deproteinized natural rubber latex (DNRL) products (Adhesive B) and stored at 4 °C. The Control group was the commercial Daro adhesive hydrobond (Factor II, Inc, Lakeside, AZ, USA). The physical properties (appearance, viscosity, spreadability, color, and pH) of the adhesives were measured and every week for 12 weeks after storing at 4 °C. The adhesives were characterized under scanning electron microscopy. Mechanical testing done were peel bond strength and biocompatibility testing was done using MTT assay. Physical, surface, and mechanical properties were compared with the commercial adhesive. Data analysis was done using SPSS version 24. Both adhesives were physically and chemically stable at temperature 4 °C and had suitable peel bond strength adhesives as the commercial adhesive. Hence, the adhesives can be used to adhere to the maxillofacial silicone prostheses.

Preparation and characterization of styrene-methyl methacrylate In deproteinized natural rubber latex (SMMADPNR)

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Siti Hajjar Che Man ◽  
Azanam S. Hashim ◽  
Hazizan Md. Akil
Keyword(s):  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Natural Rubber Latex ◽  
Monomer Conversion ◽  
Reactivity Ratio ◽  
Seeded Emulsion Polymerization ◽  
Rubber Latex ◽  
H Nmr ◽  
Deproteinized Natural Rubber

AbstractThe graft polymerization of Styrene and Methyl methacrylate (MMA) onto deproteinized natural rubber latex (DPNR) was carried out using ammonium peroxy disulfate (N2H8O8S2) as an initiator. The suitable reaction conditions based on the higher monomer conversion was determined. The degree of grafting and the copolymers composition of the resultant SMMA-DPNR were obtained using 1H NMR Spectroscopy. As expected, composition of styrene in DPNR was higher than that of MMA due to the higher reactivity ratio of styrene monomer as compared to MMA monomer and the structure of the NR backbone. The mechanism of seeded emulsion polymerization leading to graft copolymer of styrene and MMA onto NR was studied and elucidated.

Sign in / Sign up

Export Citation Format

Share Document