What is the Tg of PVP?

2a On the basis of the present work, PVP should be reassigned using the correct value of Tg = 180°C.

How do you make a 1 PVP solution?

In brief, the PVP solution was prepared by dissolving 0.5 g of PVP in 10 mL of deionized water at room temperature for 2 h under agitation. The PVP/CNC ratio was controlled by stoichiometric addition of a CNC suspension to a fixed quantity of the PVP solution followed by vigorous stirring for 1 h.

What is PVPK?

PVP K-30 polymer. Description. PVP (Polyvinylpyrrolidone) K-30 polymer is a hygroscopic, amorphous polymer. They are linear nonionic polymers that are soluble in water and organic solvents and are pH stable. PVP K-30 forms hard glossy transparent films and have adhesive, cohesive and dispersive properties.

What is PVP K17?

PVP-K17 – Names and Identifiers Name. Polyvinylpyrrolidone. Synonyms. Polyvinyl pyrrolidone. Povidone.

What is PVP K90?

Polyvinylpyrrolidone (PVP),also known as K90 is a water soluble polymer with good bio-stability. It is chemically stable, has low toxicity and is biocompatible. Hence, it is useful in a variety of applications such as cosmetics, tissue engineering, and biomedical engineering.

What is K value in povidone?

DEFINITION. Povidone is a chain polymer of 1-vinyl-2-pyrrolidone. It contains NLT 11.5% and NMT 12.8% of nitrogen (N: 14.01), calculated on the anhydrous basis. It has the nominal K-value of NLT 10 and NMT 120.

What type of viscometer is used to measure the PVP viscosity?

In practice, changes of viscosity in the aqueous solutions of PMA, polyacrylic acid (PAA), and polyvinyl pyrolidone (PVP) with the elapse of time were measured by using a rotat- ing cylinder viscometer.

How do I dissolve PVP 40?

Since PVP has both hydrophilic & lipophilic groups, then it can dissolve in many solvents. Besides water & ethanol, it dissolves in chloroform, dichloroethylene, nitrogen methyl pyrrolidone “NMP”, dimethylformamide “DMF” and dimethyl acetamide “DMAC”.

What is the difference between PVP K30 and PVP K 90?

-The medium molecular weights such as PVP K30 are preferred where viscosity is critical in applications, for example, spray. -The higher molecular weight products such as PVP K90 are better choice where high viscosity are needed in applications.

What is the properties of PvP in K90 polymer?

PVP (Polyvinylpyrrolidone) K-90 polymer is a hygroscopic, amorphous polymer. It is a linear nonionic polymer that is soluble in water and organic solvents and is pH stable. It forms hard glossy transparent films and have adhesive and cohesive properties.

What is PvP K-90 100% Powder?

PVP K-90 100% Powder is soluble in water and many organic solvents and it forms hard, transparent, glossy film. It has an average molecular weight of 1,300,000 in Daltons. Ashland’s PVP is compatible with most inorganic salts and many resins. PVP stabilizes emulsions, dispersions and suspensions.

What is the chemical name of PvP K series?

PVP K Series. Chemical Name: Homopolymer of vinylpyrrolidone CTFA Name:Polyvinylpyrrolidone (PVP) Properties and application: PVP exists as powder or aquous solution. It can dissolve in water and a variety of organic solvents. It has good hygroscopicity, film-forming capability, complexing ability and physiology compatibility.

What is the solubility of PvP in cold water?

PVP polymer is readily soluble in cold water and the concentration is limited only by viscosity. It is possible to prepare free-flowing solutions of PVP K-30 polymer in concentrations up to 60% with only moderate effect on density. PVP K-60 and K-90 polymer are available commercially as 45 and 20 percent aqueous solutions, respectively.