How are water soluble polymers made?
Large volumes of water-soluble polymers are prepared from acrylic acid, maleic anhydride, methacrylic acid and various combinations of these monomers. Carboxymethyl cellulose (CMC) is a water-soluble cellulose ether produced by the partial substitution of the cellulose hydroxyl groups with ionic hydrophilic moieties.
How do you increase the solubility of a polymer?
For solubility-enhancement applications, melt extrusion and spray drying are the most commonly used technologies. The CPPs for melt extrusion are the screw speed, extrusion temperature, feed rate, glass-transition temperature of the drug-polymer mixture, and melt viscosity.
What is water based polymer?
Water- based or water-soluble polymers are substances that dissolve, disperse, or swell in water and, thus, modify the physical properties of aqueous systems in the form of gelation, thickening, or emulsification/stabilization. They can be used in various purposes like medicine, drug delivery, concrete, painting, etc.
What affects polymer solubility?
The solubility of polymers also depends on temperature. Usually, the temperature coefficient is positive, i.e. fractional dissolution can be carried out with a given solvent (or a non-solvent/solvent mixture at constant composition) by raising the temperature.
What is a good solvent for polymer?
Polar groups bond to polar solvents. Hydrogen bonding is the giant electromagnet of the polymer world. This means water [super polar] and alcohols [polar but greasy] are good at dissolving things.
What is water soluble plastic?
Water-soluble bags are made from a derivative composed of polyvinyl alcohol (PVA) and organic plastics (water-soluble synthetic polymer) which dissolve in contact with water. For example, in a hospital, nursing home, or health care facility, all contaminated clothing is stored in these water-soluble “plastic” bags.
Is PVC water soluble?
Polyvinyl chloride
| Names | |
|---|---|
| Appearance | white, brittle solid |
| Odor | odorless |
| Solubility in water | insoluble |
| Solubility in alcohol | insoluble |