Synthetic rubber latex. Preparation of dry polymer

2015 ◽  
Keyword(s):  
Rubber Latex ◽  
Synthetic Rubber

scholarly journals Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

2020 ◽  
Vol 59 (1) ◽  
pp. 523-537
Author(s):  
Chaturaphat Tharasana ◽  
Aniruj Wongaunjai ◽  
Puwitoo Sornsanee ◽  
Vichasharn Jitprarop ◽  
Nuchnapa Tangboriboon
Keyword(s):  
Thermal Expansion ◽  
Flexural Strength ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Mold Surface ◽  
Rubber Latex ◽  
Latex Glove ◽  
Bone China ◽  
Synthetic Rubber ◽  
Natural And Synthetic

AbstractIn general, the main compositions of porcelain and bone china composed of 54-65%wt silica (SiO2), 23-34% wt alumina (Al2O3) and 0.2-0.7%wt calcium oxide (CaO) suitable for preparation high quality ceramic products such as soft-hard porcelain products for teeth and bones, bioceramics, IC substrate and magneto-optoelectroceramics. The quality of ceramic hand mold is depended on raw material and its properties (pH, ionic strength, solid-liquid surface tension, particle size distribution, specific surface area, porosity, density, microstructure, weight ratio between solid and water, drying time, and firing temperatures). The suitable firing conditions for porcelain and bone china hand-mold preparation were firing at 1270°C for 10 h which resulted in superior working molds for making latex films from natural and synthetic rubber. The obtained fired porcelain hand molds at 1270°C for 10 h provided good chemical durability (10%NaOH, 5%HCl and 10%wtNaCl), low thermal expansion coefficient (5.8570 × 10−6 (°C−1)), good compressive (179.40 MPa) and good flexural strength (86 MPa). While thermal expansion coefficient, compressive and flexural strength of obtained fired bone china hand molds are equal to 6.9230 × 10−6 (°C−1), 128.40 and 73.70 MPa, respectively, good acid-base-salt resistance, a smooth mold surface, and easy hand mold fabrication. Both obtained porcelain and bone china hand molds are a low production cost, making them suitable for natural and synthetic rubber latex glove formation.

Determination of disappearance of bis-isopropyl xanthogen (“dixie”) in synthetic rubber latex during polymerization

1949 ◽  
Vol 4 (6) ◽  
pp. 735-743 ◽  
Author(s):  
D. R. May ◽  
I. M. Kolthoff
Keyword(s):  
Rubber Latex ◽  
Synthetic Rubber

Synthetic rubber latex

1946 ◽  
Vol 241 (4) ◽  
pp. 309-310
Author(s):  
R.H.O.
Keyword(s):  
Rubber Latex ◽  
Synthetic Rubber

Recent Developments in Synthetic Rubber Latex

1961 ◽  
Vol 34 (5) ◽  
pp. 1501-1520 ◽  
Author(s):  
L. H. Howland ◽  
R. W. Brown
Keyword(s):  
Amino Groups ◽  
Rubber Latex ◽  
Low Viscosity ◽  
Polar Groups ◽  
Synthetic Rubber ◽  
Polymerization System ◽  
Recent Developments ◽  
The Government ◽  
Solids Content ◽  
Made In

Abstract Progress has proceeded at a good rate since the close of the Government Program in the spring of 1955. Improved latexes have been made, and the technology of manufacture and of application has advanced. Also progress has been made in fundamental latex research. Some of the newer latexes representing the more important advances are those involving functonal groups derived from the use of unsaturated monomers such as those containing amino groups and carboxy groups in the polymerization system, those from solid rubbers by the solvent emulsion technique, and those of higher solids content including the agglomerated latexes giving 68 per cent minimum solids at low viscosity. Some of the applications of greatest growth are : 1. Carpet backing involving both sulfur curing and so-called self-curing (noncured) elastomer latexes. The latter obtain strength from polar groups including functional (carboxyl) groups and/or fairly high styrene content. 2. Foam sponge backed carpets. In 1954 it was suggested that synthetic rubber latexes would have a permanent place in our economy. This has now come to pass, and natural latex is decreasing in volume compared to total synthetic rubber latex consumption. It now appears that by forming a latex from cis polyisoprene (synthetic natural rubber) and adding it to our list of latexes, that our country could probably become independent of the natural product.

Rheology of synthetic latex VII. Flow behavior of synthetic rubber latex at low shear stress

1955 ◽  
Vol 10 (6) ◽  
pp. 523-535 ◽  
Author(s):  
Samuel H Maron ◽  
Robert J Belner
Keyword(s):  
Shear Stress ◽  
Flow Behavior ◽  
Rubber Latex ◽  
Synthetic Rubber ◽  
Low Shear Stress ◽  
Synthetic Latex ◽  
Low Shear

Optimisation of Tensile Strength and Weight Loss via Taguchi and Response Surface Method for Natural Rubber Latex Film Consisting Cassava Peel as a Bio-Based Filler

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
Mahiratul Husna Mustaffar ◽  
◽  
Aliff Hisyam A. Razak ◽  
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Synthetic Rubber ◽  
Surface Method ◽  
Prepared Composite ◽  
Cassava Peel

Disposal latex and synthetic rubber gloves is troublesome such that disposal via incineration and land fill may release poisonous gasses and contaminate soil and water, respectively. As solution to latex and synthetic rubber, biodegradable glove is extensively studied. A bio-based filler is extracted from food waste and blended into natural rubber latex (NRL) as a composite NRL. The effect of biodegradability of composite NRL was studied by varying the loading of bio-based filler in a form of starch dispersion and blended into NRL mixture. Herein some amount of starch can be extracted from cassava peel to be incorporated in NRL for a sustainable and yet biodegradable glove. Previous work on incorporation of cassava-peel filler in NRL has shown a biodegradability without compromising the pristine strength of NRL film at 50% loading starch. In this project, tensile strength and weight loss of prepared composite NRL films were optimised via Taguchi and Response Surface Method (RSM) by means of Design Expert software by varying starch/filler loading, curing temperature and curing drying duration. Due to inadequate data, the optimisation from that previous prepared composite NRL was compared with similar work which utilising NRL and bio-based filler. For Pulungan (2020) study, it can be concluded that the tensile strength of cassava peel starch biodegradable film has the best condition at 50°C to 60°C at approximately 5.5 hours. Elongation optimum conditions shows contrast value of temperature and time. Meanwhile, for Wendy (2020) study, it shows the best percentage loading of cassava-peel starch is at 20% to achieve high stress and strain at break. The optimised mechanical properties via Taguchi and RSM are rather different and hence validation on mechanical properties at above mentioned conditions need to be performed experimentally.

The Morphology of Rubber Latex Particles. A Critical Review

1946 ◽  
Vol 19 (1) ◽  
pp. 187-189
Author(s):  
Ernst A. Hauser
Keyword(s):  
Electron Microscopy ◽  
Chemical Composition ◽  
Critical Review ◽  
Light Microscope ◽  
Rubber Latex ◽  
Latex Particles ◽  
Synthetic Rubber ◽  
Hydrocarbon Polymers ◽  
The Subject ◽  
First Time

Abstract The morphology of the hydrocarbon particles of latices obtained from several rubber producing plants has in recent years again been the subject of studies applying the most modern tools of research. Lucas used for his studies an ultraviolet light microscope and later ultramicrocinematography. Quite recently Hendricks, Wildman, and McMurdie applied electron microscopy for the first time for this purpose. Since some of the deductions in regard to the form and structure of latex particles which have been drawn from these studies differ in several respects from conclusions based on micrugic and ultramicroscopic studies, some of which were reported twenty years ago, it seems advisable to clarify the picture. Such clarification is most important at present, because a better knowledge of the morphology of natural and synthetic rubber latex particles might offer a valuable aid in explaining some of the differences in the properties of these hydrocarbon polymers, which are not readily explainable on the basis of differences in chemical composition alone.

Simultaneous Stripping of Styrene and Methanol from Synthetic Rubber Latex

1957 ◽  
Vol 49 (8) ◽  
pp. 1271-1276 ◽  
Author(s):  
H. C. Van. Ness ◽  
O. E. Dwyer ◽  
W. W. Slobbe
Keyword(s):  
Rubber Latex ◽  
Synthetic Rubber
Sign in / Sign up

Export Citation Format

Share Document