To solve the problems that the acrylate macromonomer is often colored during synthetic process and the UVcured film of liquid optical clear adhesive prepared therefrom is easy to turn yellow

a new synthetic route is reported in this paper. A colorless and transparent polybutadiene acrylate macromonomer (PBAM) is synthesized in one-pot using hydroxyl-terminated polybudiene (HTPB)

potassium naphthalene

and acryloyl chloride (AC) as raw materials. Subsequentially

liquid optical clear adhesive was prepared through blending PBAM

reactive diluent monomer

and photoinitiator. Finally

a series of colorless and transparent films were prepared through UV-curing process. The structure of PBAM was characterized by GPC

1

H-NMR

and FTIR. The optical properties

yellowing resistance

low temperature resistance of UV-cured films were further studied. The results showed that a colorless and transparent PBAM was successfully synthesized by the new route. The UV-cured films of liquid optical clear adhesive exhibited excellent optical properties and yellowing resistance property. The transmittance of cured films was as high as 98%. After 264 hours of accelerated aging exposure to ultraviolet radiation

the color difference (Δ

E

) was below 1.5. In addition

the cured film also presented good low temperature resistance

and it’s glass transition temperature was as low as -30℃.