Microgelation in the curing reaction of unsaturated polyester resins

Abstract

SYNOPSISA series of unsaturated polyesters were synthesized with various chemical structures and molecular weights. These unsaturated polyesters were used to study the curing reaction with styrene by using gel permeation chromatography and differential scanning calorimetry. The variation of the size of microgel particles during the curing reaction in unsaturated polyester-styrene resins was studied by using gel permeation chromatography. The size and structure of the microgels depend strongly on the polymer chain length and the number of vinyl groups on each unsaturated polyester chain. Using the differential scanning calorimetric method, the conversion of styrene and polyester vinyl groups during the reaction was measured. The experimental results of this study revealed that microgel formation has a great effect on the curing reaction of unsaturated polyester resins. 0 1994 John Wiler & Sons. Inc.

Unsaturated Polyesters and Vinyl Esters

“…The overall process leads via macrogelation to the formation of a micro-gel structure (Figure 6.22d). This mechanism was confirmed by light-scattering [135À139] and gel permeation chromatography [140,141].…”

Microgelation of unsaturated polyester resins in the presence of poly(vinyl acetate) by static and dynamic light scattering

“…1(d)]. The microgel formation mechanism of the UPE/styrene curing reaction was previously confirmed by light-scattering [11][12][13][14][15] and gel permeation chromatography (GPC) 16,17 measurements.…”

Silver nanoparticles formation within unsaturated polyester/styrene resins induced by UV irradiation and thermal treatment

“…The degree of polyester unsaturation and its molecular weight also play an important role in the curing mechanism. Finally, micro‐ and macrogelation also occur in these reactions [24].…”