Poly(styrene-isoprene-butadiene-g-SAN) graft copolymers: Size-controllable synthesis and their toughening properties

- Two functionalized poly(styrene-isoprene-butadiene) (PSIB) latexes containing SAN copolymer were synthesized.
- The PSIB latex via a seeded-emulsion polymerization was partially miscible with the unimodal distribution of rubber particles.
- Bimodal PSIB latex was obtained by agglomerating process with amphiphilic block copolymers.
- The PSIB-g-SAN particles with a two-stage seed-emulsion polymerization exhibited a relative homogeneity of distribution in-space.
- The PSIB-g-SAN particles being prepared by agglomerating process showed an unequal size structure and an 'internal-grafting' characteristic.