A simplified mathematical model which made use of Fick's laws of diffusion written in spherical coordinates was developed to describe the rate of diffusion of residual monomers from polymer resins. The properties of the monomer-polymer system which influenced the amount of monomer remaining in the polymer as a function of time were the diffusivity and solubility of the monomer in the polymer, a...

A challenge encountered by many practicing fire engineer carrying out fire modelling is that the combustible fuel is not completely well-known. Practical materials may, for instance, be identified as some well-known polymer, but this is usually not the whole truth from the viewpoint of the fire behaviour. Besides of the nominal polymer, the blend may include large quantities of different additi...

We conduct a review of the recent progress utilizing amorphous and semicrystalline polymer additives with varying molecular weight to manipulate crystallization, morphology, charge transport solution-processable organic semiconductors.

A building block approach, using a variety of benign solvent compositions and additives, offers continuously developing strategy to render solvent-based electrospinning increasingly sustainable for the generation polymer nanofibers.

Reported is a study evaluating the potential of esterified tannins as plastic additives in poly(lactic acid) (PLA). Tannin esterification using anhydrides was investigated as a route to synthesize tannin esters possessing varying ester chain length and degree of substitution (DS). Esterification decreased the tannin UV absorbance, predominately in the UVB region. However, tannin materials with ...

the effects of magnesium hydroxide and l-lactide dimer as additives on thermal properties and morphology of poly(l-lactide) (plla) films were studied. hence, neat plla films and films containing additives (10% w/w) were prepared in dichloromethane at room temperature via solution casting. to evaluate thermal history on polymer properties, plla films were annealed by different processes. in one ...

The effect of polymer, plasticizer, and surfactant additives on stress development during drying of calcium carbonate particulate coatings was studied using a controlled-environment apparatus that simultaneously monitors drying stress, weight loss, and relative humidity. We found that the calcium carbonate coatings display a drying stress evolution typical of granular films, which is characteri...