Enhanced asphalt performance upon addition of RAFT-synthesized reactive multi-block copolymers

Structurally well-defined functionalized polyolefins and graft copolymers thereof as bitumen modifiers

“…For example, the PG con for PMB containing 2.5 wt% of FPP-g-SMA30S increased up to 76.9 • C. Although only limited amounts of the modifiers were introduced into bitumen, a remarkable increase of PG up from 58 • C to 76 • C was noted. The results evidence strong interactions between the FPP-g-SMA30S modifier and the asphaltene fraction of bitumen (BRP), leading to the formation of a complex multiphasic structure with an enhanced elasticity [36,56]. In summary, the obtained rheology data strongly suggests that FPP-g-SMA30S-modified bitumen could be a suitable paving material intended for the application in warm climate regions.…”

“…Inspired by the work of Benvenuta-Tapia et al [36], who produced bitumen modified with copolymers of poly(butyl acrylate) and poly (styrene-co-maleic anhydride) (SMA), we have synthesized a series of i-PP-graft-SMA copolymers and used them as bitumen modifiers in a quest to expand the understanding of the FPOs' influence on the bitumen performance. i-PP-graft-SMA samples were prepared via esterification in the melt or in solution starting from hydroxyl-functionalized propylene copolymers and SMA.…”

Synthesis, spectral characterization and DFT calculations of novel macro MADIX agent: mechanism of addition-fragmentation reaction of xanthate compound

“…The synthesis of various types of macromolecules, including block copolymers, is usually obtained by reversible-deactivation radical polymerization [1]. In recent years, significant developments have occurred in the synthesis chemistry, such as the ability to obtain innovative polymeric materials [2,3], by controlling molecular properties [4,5], chain length distribution, stereogenicity, copolymer composition, block copolymer alignment, lengths and functional group addition [6][7][8][9][10][11]. Controlled/living radical polymerization (CRP) are known as living polymerization techniques [12][13][14].…”