3 thoughts on “What is the phenolic resin? What is the role?”
Kristi
Phenolic resin is a collective name for synthetic resin for synthetic resin for alkyl phenol and formaldehyde phenols under the action of acid -base catalysis. The appearance of phenolic resin is usually colorless or yellow to brown -red transparent block solid. Soluble in water. Organic solvents such as acetone and alcohol. The phenolic resin is resistant to weak acid and weak alkali, which is easy to decompose in strong acids and corrosion in strong alkali. Phenolic resin has excellent heat resistance, abrasion resistance, water resistance and aging resistance, and has the characteristics of good rigidity, size stability, and good electrical properties. It is widely used to make special use plastic, coatings, adhesives and acid -resistant cement.
A polymer compound, commonly known as electric wood. It has the characteristics of high temperature that is not easy to deform and is not flammable, commonly used switches and sockets for making circuits, as well as other plastic products.
Pay content for time limit to check for freenThe solid phenolic resin is yellow, transparent, and non -fixed -shaped substances. It is reddish because it contains free phenol. The proportion of the entity is about 1.7, which is easily soluble in alcohol, insoluble in water, and stabilizes water, weak acid, and weak alkali solution. A resin made of phenols and formaldehyde in catalyst conditions. Due to the different catalysts, it can be divided into two types: heat solid and thermoplasticity. The phenolic resin has good acid resistance, mechanical performance, and heat resistance. It is widely used in industries such as anti -corrosion engineering, adhesives, flame retardant materials, sand wheel manufacturing and other industries. Reproduction reaction to generate phenolic resin. Under the influence of acidic catalysts, a line -type thermoplastic resin is generated when the phenol is excessive; under the action of alkaline catalysts, the body type thermosetry resin is generated when excessive formaldehyde. [Operation] (1) Add 4G chemical pure phenol and 2.5ml chemical pure formaldehyde solution (density of about 1.1g/cm3, concentration of 36-38%) to a test tube of 25 × 200mm. After the oscillation is uniform, the rubber plugs with straight glass tube (300mm). Fix the above test tube on the iron frame and heat it in a water bath at 80-90 ° C (as shown in the left). After a while, a severe reaction occurred in the test tube, and heated it after reaction until it was generated until pink solid resin. Remove the solid resin (hook with wire), rinse with water and get thermoplastic resin. (2) Add 2.5g chemical pure phenol and 3ml chemical pure formaldehyde solution (concentration of the same first) to a test tube of 25 × 200mm, and then add 1ml chemical pure thick ammonia water (concentration of 25-28%). There is a straight glass tube (300mm) rubber plug. Fix the above test tube on the iron frame and heat it with a boiling water bath until the mixture is divided into two layers. When the viscosity of the bottom layer increases, remove the test tube with water to cool down, wait for the resin to fix it out, and rinse it with water to obtain a yellow thermosetable resin.nI hope the answer can help you, I wish you a happy life, and I hope you can like it. Thank you.
Phenolic resin is a collective name for synthetic resin for synthetic resin for alkyl phenol and formaldehyde phenols under the action of acid -base catalysis. The appearance of phenolic resin is usually colorless or yellow to brown -red transparent block solid. Soluble in water. Organic solvents such as acetone and alcohol. The phenolic resin is resistant to weak acid and weak alkali, which is easy to decompose in strong acids and corrosion in strong alkali. Phenolic resin has excellent heat resistance, abrasion resistance, water resistance and aging resistance, and has the characteristics of good rigidity, size stability, and good electrical properties. It is widely used to make special use plastic, coatings, adhesives and acid -resistant cement.
A polymer compound, commonly known as electric wood. It has the characteristics of high temperature that is not easy to deform and is not flammable, commonly used switches and sockets for making circuits, as well as other plastic products.
Pay content for time limit to check for freenThe solid phenolic resin is yellow, transparent, and non -fixed -shaped substances. It is reddish because it contains free phenol. The proportion of the entity is about 1.7, which is easily soluble in alcohol, insoluble in water, and stabilizes water, weak acid, and weak alkali solution. A resin made of phenols and formaldehyde in catalyst conditions. Due to the different catalysts, it can be divided into two types: heat solid and thermoplasticity. The phenolic resin has good acid resistance, mechanical performance, and heat resistance. It is widely used in industries such as anti -corrosion engineering, adhesives, flame retardant materials, sand wheel manufacturing and other industries. Reproduction reaction to generate phenolic resin. Under the influence of acidic catalysts, a line -type thermoplastic resin is generated when the phenol is excessive; under the action of alkaline catalysts, the body type thermosetry resin is generated when excessive formaldehyde. [Operation] (1) Add 4G chemical pure phenol and 2.5ml chemical pure formaldehyde solution (density of about 1.1g/cm3, concentration of 36-38%) to a test tube of 25 × 200mm. After the oscillation is uniform, the rubber plugs with straight glass tube (300mm). Fix the above test tube on the iron frame and heat it in a water bath at 80-90 ° C (as shown in the left). After a while, a severe reaction occurred in the test tube, and heated it after reaction until it was generated until pink solid resin. Remove the solid resin (hook with wire), rinse with water and get thermoplastic resin. (2) Add 2.5g chemical pure phenol and 3ml chemical pure formaldehyde solution (concentration of the same first) to a test tube of 25 × 200mm, and then add 1ml chemical pure thick ammonia water (concentration of 25-28%). There is a straight glass tube (300mm) rubber plug. Fix the above test tube on the iron frame and heat it with a boiling water bath until the mixture is divided into two layers. When the viscosity of the bottom layer increases, remove the test tube with water to cool down, wait for the resin to fix it out, and rinse it with water to obtain a yellow thermosetable resin.nI hope the answer can help you, I wish you a happy life, and I hope you can like it. Thank you.