A novel explanation of a low-profile mechanism for unsaturated polyester resins using phase diagrams

Journal Article · Sat Mar 31 23:00:00 EST 1990 · SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (USA)

OSTI ID:5686895

Suspene, L; Fourquier, D; Yang, Y S ^[1]

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1. Norsolor Orken Group, Verneuil (FRA)

A novel explanation for the mechanism of low profile additives in unsaturated polyester resins by using a concept of a phase diagram was proposed. According to the ternary phase diagrams for the systems of styrene-unsaturated polyester prepolymer-additives (e.g., polyvinyl acetate, polyurethane), the phenomenon of phase separation was explained. Furthermore, the final morphology of cured resins was correlated to the phase diagram. Microscopic observations showed the morphology was controlled by the phase separation. TEM results also clearly showed that the microvoids were formed in the low profile phase, separated from the resin phase, instead of being in the interfacial region as previously reported. It was concluded that a well controlled phase diagram can lead to a shrinkage-controlled low profile system.

• OSTI ID: 5686895
• Journal Information: SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (USA), Journal Name: SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (USA) Vol. 21:3; ISSN 0036-0821; ISSN SAMQA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
CALORIMETRY
CHROMATOGRAPHY
DATA
DATA ANALYSIS
DIAGRAMS
ELECTRON MICROSCOPY
ESTERS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
INFORMATION
MICROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHASE DIAGRAMS
POLYESTERS
POLYMERS
RESINS
SEPARATION PROCESSES
TRANSMISSION ELECTRON MICROSCOPY