Synthesis of acrylated styrene-isoprene-styrene copolymer

Abstract

Vulcanization of polymer by ultraviolet irradiation has been playing an important role in the industrial sector especially for coating, ink and printing applications. Polymers used in this area are sensitive to ultraviolet (UV) radiation. Their final products have properties required for particular specifications. One of the methods to synthesize ultraviolet-sensitive polymers is the grafting of ultraviolet-sensitive units onto other polymer backbones. In this work, styreneisoprene-styrene copolymer (SIS) was selected as a polymer backbone whilst acrylic acid served as an ultraviolet sensitiser. The grafting reaction was carried out in a solution state of toluene through the ring-opening addition reaction of epoxidized SIS molecules. The results indicated that acrylic acid can be successfully grafted onto a previously epoxidized SIS backbone at a reaction temperature of 100 °C. Furthermore, the acrylation yield increased with the increase of reaction time.

Epoxidation of Styrene/Butadiene Star Block Copolymer by Different Methods and Characterization of the Blends with Epoxy Resin

“…In addition, the drastic decrease in intensities of the peaks centered around 965 cm −1 and 910 cm −1 in all the epoxidized samples can be observed, which correspond to the C‐H bending vibrations of vinyl side chain (CH 2 = CH‐) and trans ‐1,4‐polybutadiene, respectively . The peak at 1240 cm −1 represents the in‐plane bending of aromatic C‐H bonds, respectively .…”

“…). Let us carefully look at the peaks centered around 899 cm −1 and 1260 cm −1 which have been assigned to half and whole of the epoxy rings stretching, respectively . The presence of those peaks in the epoxidized samples confirms, thus, the occurrence of desired modification.…”

“…For the pure copolymer, the peaks centered at 965 cm −1 and 910 cm −1 can be clearly visible. Those peaks correspond to the C‐H bending vibrations of vinyl side chain (CH 2 = CH‐) and trans ‐1,4‐polybutadiene, respectively . The peak at 1240 cm −1 represents the in‐plane bending of aromatic C‐H bonds.…”