Thermal Stability of UV Adhesives

Thermal stability as one of the UV adhesive performance indicators, AVENTK mentioned less in previous articles.

Recently, some customers asked AVENTK, want to know how the thermal stability of UV adhesive performance, what factors will be affected.
AVENTK as a UV adhesive manufacturer, today we will share with you what factors factors will affect the adhesive thermal stability performance.

UV glue thermal stability means that the glue in the case of heating can keep the properties stable, and on the UV glue thermal stability of the factors affecting what, AVENTK as a UV glue manufacturers, today collated the relevant content to share with you.

Factors affecting thermal stability

UV glue residual photoinitiator will affect the thermal stability of UV glue. The thermal stability of isocyanurate is better than oxazolidinone, which in turn is better than urethane. The thermal stability of polyester polyols is much better than that of polyether polyols. The catalyst used in the synthesis of polyurethane UV resins also affects their thermal stability.

A comparison of polyols and polyamines shows that the thermal stability of the zwitterions obtained from polyols is always better than that of polyamines.

For amino-terminated ethylene oxide and propylene oxide products, trifunctional polyamines based on trimethylolpropane exhibit less heat loss compared to bifunctional polyamines, which correlates with the final crosslinked network density.

For isocyanates of different structures, the thermal stability is, from highest to lowest: bis-aliphatic > aromatic > aliphatic.

The thermal stability of polyurethane zwitterions with different polyol structures while maintaining the same molecular weight is, in descending order: polycaprolactone > polycarbonate > polybutylene oxide > polyethylene oxide > polyether copolymer > polypropylene oxide.

Changing the molecular weight of UV glue while maintaining the same structure, the higher the molecular weight the worse its thermal stability. When the functionality increases (i.e., decreases the equivalent molecular weight), the thermal stability is better because the chain segments between cross-linking points become shorter.

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AVENTK products include UV curing adhesives, low temperature heat curing adhesives, hot melt adhesives, catalyst curing adhesives and UVLED curing equipment for camera modules, security products, PCBA coating, loudspeakers, electronic assemblies, medical care, fiber optic devices, printing, coding and other industries.