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Rubber vs silicone
12-27

2021

Rubber vs silicone

The main difference between rubber and silicone is that silicones contain silicon and oxygen in the main chain, while most rubber forms control carbon-carbon bonds in the main chain. What is rubber Rubber is a highly elastic polymer material with reversible deformation, flexible at room temperature, can produce large deformations under small external forces, and can return to its original state after removing external forces. Rubber is an utterly amorphous polymer with a low glass transition temperature (T g) and often a significant molecular weight greater than several hundred thousand. Rubber is divided into two types: natural rubber and synthetic rubber. Natural rubber is made by extracting gum from rubber trees, grass, and other plants, while synthetic rubber is made from various monomers by polymerization. Rubber products are widely used in industry or in various aspects of life. Rubber Properties Natural Rubber is made from latex collected from rubber trees and is a polymer of isoprene. It has good abrasion resistance, high elasticity, tear strength, and elongation. It is quickly aged in air, becomes sticky in the heat, swells and dissolves easily in mineral oil or gasoline, and is resistant to alkali but not too strong acids. Advantages: good elasticity, acid, and alkali resistance. Disadvantages: not heat-resistant, not oil-resistant (can be resistant to vegetable oil), is the raw material for making tape, hose, rubber shoes, and suitable for making shock-absorbing parts, products used in automobile brake fluid, ethanol, and other liquids with hydroxide roots. Due to their elastic behavior, rubbers can be used in many applications such as cookware, electronics, automotive applications, etc. Since they are waterproof materials, they can be used as sealants, gloves, etc. Rubber or elastomers are excellent materials for insulation purposes. Rubber classification According to the properties and uses of rubber: In addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi-general synthetic rubber, special synthetic rubber, and unique synthetic rubber. according to the physical form of rubber: the rubber can be divided into hard and soft rubber, raw rubber and blended rubber, etc. According to the performance and use of points: general-purpose rubber and unique rubber. What is silicone It is a highly active adsorbent material, which is an amorphous substance. The main component of silicone is silicon dioxide, chemically stable and non-combustible. The chemical formula is xSiO2-yH2O, and it is a transparent or milky white granular solid. It has an open porous structure, strong adsorption, and can adsorb various substances. When dilute sulfuric acid (or hydrochloric acid) is added to the aqueous water glass solution and left to stand, it will become a watery silicone and solidify. Generally speaking, silicone can be divided into two categories: organic silicone and inorganic silicone, according to its nature and components. Silicone performance The main component of silicone is silicon dioxide, which is chemically stable and non-combustible. Silicone is amorphous silica; the dust content of the workshop should be controlled by not more than 10 mg/m3, need to strengthen the exhaust air, wear a mask when operating. Silicone has a strong adsorption ability and can have a drying effect on human skin. Therefore, you should wear suitable work clothes when operating. Blue silicone has potential toxicity because it contains a small amount of cobalt chloride, so contact with food and inhalation should be avoided. silicone in the process of use because of the adsorption of water vapor or other organic substances in the medium, the adsorption capacity decreases, can be reused by regeneration. Silicone is used as a unique material for aviation, cutting-edge technology, and military technology sectors and is used in various sectors of the national economy. Its application has been expanded to construction, electrical and electronic, textile, automotive, machinery, leather and paper, chemical and light industry, metal and paint, medicine and medical treatment, etc. The difference between rubber and silicone is as follows The two have different definitions. Rubber is a general term that includes many types, such as natural rubber, butadiene rubber, styrene-butadiene rubber, propylene rubber, and silicone rubber, while silicone is one of the specific varieties rubber. rubber has a wide range of uses, mainly using the elasticity of rubber, such as rubber tires, bridge damping, rubber hose rollers, etc., mainly for industrial use; silicone is primarily used in food and household appliances, such as pacifiers, children's spoons, voltage pot seals, etc. Different types and grades of rubber are used in different applications; for example, natural rubber is used primarily for tires, butyl rubber is mainly used for inner tubes, and EPDM rubber is used for sealing products. When choosing rubber, it needs to be based on specific performance index requirements, such as hardness, tensile strength, compression deformation, abrasion, tearing, use environment, etc. The structure is not the same, but they can be shared in many fields. The most commonly used condensation tubes in our laboratory are rubber and silicone, except that silicone products are better in nature and have significant aging resistance. In terms of structure, the main chain of rubber is mainly carbon, which is organic, while the main chain of silicone is mainly a Si-O bond, and this is the main difference between them.

Why doesn't silicone melt or burn?
07-28

2021

Why doesn't silicone melt or burn?

Can silicone burn ? Silicone Properties silicone is an extremely responsive adsorbent product, which is amorphous in nature. The primary component of silica is silicon dioxide, which is chemically secure. Different silica gel is resistant to high temperatures in between 120 as well as 350 ° C. Silicone is chemically stable as well as resistant to low and high temperature levels. Silicone Basic Information Name: Silicone Alias: silica gel or silicic acid gel English name: Silica gel; Silica Molecular formula: xSiO2-yH2O Molecular weight: 60.08 silicone melt or burn Silicone does not melt or burn at quite heats, yet it does melt as well as melt. It has a high melting point since its interatomic forces (covalent bonds) are rather strong. Furthermore, unlike metal or ionic bonds, covalent bonds do not maintain much (or any kind of) of their stamina in the molten state. Silicone Structure Transparent or milky white granular solid. It has open porous framework, strong adsorption, and can adsorb numerous type of compounds. When water down sulfuric acid (or hydrochloric acid) is added to the liquid solution of water glass and left to stand, it will become a silica gel including water and solidified. The electrolyte Na+ as well as SO4 2-(Cl-) ions dissolved in it are eliminated by water washing, as well as silica gel is acquired after drying. If absorbing water, some silica gel wetness absorption has to do with 40%, even 300%. It is made use of for gas drying out, gas absorption, fluid dehydration, shade layer analysis, etc. It is likewise made use of as a catalyst. If cobalt chloride is added, it will certainly be blue when dried out as well as red after absorbing water. It can be restored and made use of consistently. Silicone Identification Method There is a burning technique to determine silicone prodcut: if it is white ash after melting, after that it can be wrapped up that it is among the silicone.

Do you put silicone bakeware directly on the oven rack?
06-17

2021

Do you put silicone bakeware directly on the oven rack?

Yes, silicone baking pans can be used directly on the oven rack. Silicone rubber is stable and chemically inert, easy to clean and non-stick, and it is used in many applications. Silicone products for food should be made of food grade silicone that meets certain labeling, such as FDA food standards (FDA CFR 177.2600). Advantages of silicone baking pans The product is safe, non-toxic, durable, suitable for all kinds of ovens, microwave ovens and refrigerators, etc., with more outstanding characteristics than similar products, non-iron protective softness is superb, more convenient and quick to use. Using food-grade silicone material. Products are in line with FDA, LMBG, safety certification standards. With a longer service life than other materials. Can be put into the dishwasher for cleaning. Various colors are available. Can withstand high temperature 300 degrees, low temperature -50 degrees. Will not stick with food when baking, easy to clean place

What is the melting point of silicone rubber?
06-16

2021

What is the melting point of silicone rubber?

Silicone rubber is a highly active adsorbent material, is an amorphous substance, its chemical molecular formula is mSiO2-nH2O Because it is a hydrate, the temperature is too high will first lose crystalline water, the loss of crystalline water is not called silica, but called silica Therefore, silica only the highest use temperature, no melting point, silica: SiO2 is also known as silica. It is widely distributed in nature, such as quartz, quartz sand, etc. White or colorless, with high iron content is light yellow. Density 2.2 ~ 2.66. Melting point 1670 ℃ (scale quartz); 1710 ℃ (square quartz). Boiling point 2230 ℃, the relative dielectric constant is 3.9. The maximum temperature for regeneration of various industrial silica gel should not exceed the following limits. Coarse pore silica gel shall not be higher than 600℃. Fine pore silica gel shall not be higher than 200°C. Blue gum indicator (or discolored silica gel) shall not be higher than 120℃. Silicone aluminum rubber shall not be higher than 350 ℃. After the regeneration of silica gel, its moisture is generally controlled at 2% or less can be put back into use While most plastics will begin to melt at high temperatures, silicones have no melting point and remain solid until combustion occurs. At high temperatures (200-450oC), silicone rubber slowly loses its mechanical properties over time and becomes brittle. One of the important properties of silicon is that it has a wide temperature tolerance in operating environments from -60°C (-76°F) to 230°C (446°F). While most plastics will begin to melt at high temperatures, silicon has no melting point and will only remain solid when combustion occurs. Will silicone melt in the oven? Silicone is a pliable but highly heat-tolerant material. While you may initially worry that a silicone pan will melt in the oven, it won't. It can withstand temperatures of over 500 degrees, making it the perfect material for cooking. With that in mind, will silicone melt or burn? Silicones (there are different types) do melt and burn, but at a higher temperature than other substances such as regular plastic. the Si-O- part is very stable and cannot be oxidized, but with enough energy, the organic side groups can be oxidized and you will get silica. Silicon melts at the right temperature. 1414°C (2577.2°F) to be exact. It has a high melting point because it has very strong interatomic forces (covalent bonds). In addition, unlike metallic or ionic bonds, covalent bonds do not retain much (or any) strength in the molten state. Therefore, unlike metallic aluminum or zinc, silicon has a fairly high energy barrier that needs to be cleared to melt. Silicon burns under the right conditions. This is because the silicon-oxygen bond is much stronger than the silicon-silicon bond. But igniting a chunk of silicon is as difficult as igniting a diamond. Both are networked solids with similar tightly packed crystal structures. In a nutshell (or in short), silicon can and does melt and burn at extreme temperatures and conditions. It has been suggested that silicone has a melting point of 2,577°F (1,414°C).

What are the effects of heating on Silicone?
06-15

2021

What are the effects of heating on Silicone?

Silicone itself is not poisonous, but some silica gel is blended with additives dangerous to body, silica gel is an extremely active adsorbent material, is an amorphous material, its chemical formula is mSiO2-nH2O, insoluble in water and any kind of solvent, non-toxic, unappetizing, chemically steady, with the exception of solid alkali, hydrofluoric acid does not react with any kind of substances. Numerous types of silica gel have various microporous frameworks because of various manufacturing methods. Silicone has relatively heat tolerance, however get it near a real fire and also it deteriorates. When I overheated treated silicone caulk, it weakened to an extremely viscous liquid, a little bit gummier than uncured silicone caulk. Caulk is tin-catalyzed silicone as well as your pots and pans is probably platinum-catalyzed silicone. Evaluate it by yourself if you need to. You also asked whether there are toxic decomposition products. You'll have to look that up, as well as sadly it depends on the type of silicone. Regarding I know, cookware and excellent quality consumer products are made of platinum-catalyzed silicone. For example, if heated up to 150 ° C you would certainly see really little modification in the silicone, even if held at this temperature for a very long time, At 200 ° C the silicone will slowly end up being harder and also less elastic with time, as well as if the silicone was warmed up to a temperature level past 300 ° C, you would rapidly see the product