Aggregation stability of natural rubber latex with low dry rubber content (DRC) in acidic medium

1998 ◽  
Vol 40 (1) ◽  
pp. 111-116 ◽  
Author(s):  
A.?M.?B. Bittencourt ◽  
D. Tabak ◽  
V.?G. Costa ◽  
E.?R. Lachter
Keyword(s):  
Natural Rubber ◽  
Acidic Medium ◽  
Natural Rubber Latex ◽  
Rubber Content ◽  
Rubber Latex ◽  
Aggregation Stability

scholarly journals FWHM Dimentional Analysis From Scattered Light Intensity Profile for Dry Rubber Content Determination in Natural Rubber

2018 ◽  
Vol 9 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Ikha Rasti Julia Sari ◽  
Januar Arif Fatkhurrahman ◽  
Farida Crisnaningtyas ◽  
Moch. Syarif Romadhon
Keyword(s):  
Natural Rubber ◽  
Scattered Light ◽  
Rubber Particle ◽  
Natural Rubber Latex ◽  
Correlation Factor ◽  
Rubber Content ◽  
Rubber Latex ◽  
Content Determination ◽  
Latex Coagulation ◽  
High Linear Correlation

Dry Rubber Content (DRC) describes a rubber particle percentage in natural rubber latex. In this paper, the relation between forward light scattering profiles of natural latex and rubber contents is reported for dry rubber content latex. The profile, characterized by Full Width at Half Maximum (FWHM), is increasing linearly with respect to rubber content. The measurement was performed immediately after latex being tapped with necessary addition of acetic acid. This addition was meant to prevent latex coagulation. There is a high linear correlation between DRC and FWHM of both domain: one and two dimension. This is indicated by correlation factor which are higher than 0.9 for both of domains and sufficient in DRC determination.

scholarly journals Parallel plate capacitor designed to determine the dry rubber content in natural rubber latex

2021 ◽  
Author(s):  
Prapat Mahapattanathai ◽  
Kanpoj Thongcham ◽  
Dumrongsak Rodphothong ◽  
Wipada Ngansom
Keyword(s):  
Natural Rubber ◽  
Parallel Plate ◽  
Natural Rubber Latex ◽  
Rubber Content ◽  
Parallel Plate Capacitor ◽  
Rubber Latex ◽  
Plate Capacitor

More Values of L-Quebrachitol from Skim Natural Rubber Latex

2015 ◽  
Vol 659 ◽  
pp. 458-462 ◽  
Author(s):  
Teerawan Wannuch ◽  
Adun Nimpaiboon ◽  
Jitladda Sakdapipanich
Keyword(s):  
Antibacterial Activity ◽  
Natural Rubber ◽  
Colloidal Suspension ◽  
Rubber Tree ◽  
Natural Rubber Latex ◽  
Water Soluble ◽  
Low Grade ◽  
Rubber Content ◽  
Rubber Latex ◽  
Bioactive Materials

Natural rubber (NR) latex collected from Hevea brasiliensis rubber tree exists as a colloidal suspension with 30% dry rubber content (DRC). For convenient use and transportation, the latex is concentrated by centrifugation process. Through this process, the 60% DRC concentrated NR latex and 5% DRC skim latex as a by-product were produced. After using acid coagulation of skim latex, the skim rubber is obtained to use as a low-grade application due to high amount of non-rubber components as impurities. The water portion remaining after the coagulation of skim rubber consists of various water-soluble materials such as sugars, lipids, proteins and minerals, which can cause the water pollution if serum is directly discharged into the environment without proper treatment. However, 1.5% of L-quebrachitol was found in skim latex. It can be used in many applications such as a starting material for the synthesis of bioactive materials and inositol pharmacy. Thus, this work is an attempt to investigate the most effective extraction method of L-quebrachitol from skim latex. It was found that the appropriate solvent for extraction L-quebrachitol at high temperature and for recrystallization at low temperature is ethanol. The yield of L-quebrachitol about 2-3% by weight of solid serum was obtained. Moreover, a sweetness and antibacterial activity were also studied for its further applications. It was found that the sweetness of L-quebrachitol was twice than that of sucrose. No antibacterial activity of L-quebrachitol against Staphylococcus aureus and Streptococcus mutans was found.

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