What is the difference between epoxy resin and phenolic resin?
What is the difference between epoxy resin and phenolic resin?
Phenolic resins and epoxy resins are two types of materials that we can use in this purpose. The key difference between phenolic resin and epoxy resin is that phenolic resins show a low level of heat resistance, whereas epoxy resins show a high level of heat resistance.
How do you dissolve phenolic resin?
phenolic resin is a brittle polymers and have good thermal properties due to the presence of aromatic structure in their polymers chain, So in order to degradation with out using heat y using strong solution of sodium hydroxide.
Is phenolic resin poisonous?
1. Amino and phenolic resins contain formaldehyde, which is highly toxic by inhalation, highly toxic by eye contact and ingestion, and moderately toxic by skin contact.
Is phenolic the same as Bakelite?
Bakelite is the trade name of one particular phenol-formaldehyde resin formulation, to which wood powder or other materials was usually added as a filler. These materials are generically called phenolic resins. Bakelite was invented by a Belgian chemist who emigrated to the US, Dr. Leo Baekeland.
How strong is phenolic resin?
Phenolics
| Resin material | Density (g/cm3) | Tensile strength (MPa) |
|---|---|---|
| Phenolic | 1.2–1.4 | 35–60 |
Is phenolic resin waterproof?
Phenolic Formaldehyde resin are one kind of thermosetting resin with heat resistant, waterproof and the most used for exterior application or superior water resitance (e.g. external wall house, roof), with low formaldehyde excess.
Does phenolic resin melt?
Phenolic resins are also used for making exterior plywood commonly known as weather and boil proof (WBP) plywood because phenolic resins have no melting point but only a decomposing point in the temperature zone of 220 °C (428 °F) and above.
How do you dissolve phenol formaldehyde resin?
Due to use of acetic acid, a strong vinegar smell is associated with this experiment. 1) Dissolve phenol crystals in formaldehyde (formaldehyde to phenol ~ 1.5 ratio) (4 gm phenol, 6-10 grams phenol formaldehyde) 2) Dissolve NaOH in water (concentrated).
Is phenolic resin food safe?
Other applications of phenolic resin are often more industrial—ballistics, mine ventilation, off-shore water pipes, and even aerospace. Therefore, finding this resin in food products may seem odd, but here’s why phenolic resin is food safe and not to be feared.
Why is Bakelite no longer used?
By the late 1940s, newer materials were superseding Bakelite in many areas. Phenolics are less frequently used in general consumer products today due to their cost and complexity of production and their brittle nature.
How hard is phenolic resin?
Phenolic resins tend to be relatively cheap (certainly less than epoxies and polyimides), have high temperature resistance, and low flammability. Their main drawback is very low toughness, which tends to limit their applications to those where heat and combustion resistance is important.