title: UV-absorbent lignin-based multi-arm star thermoplastic elastomers.
abstract: Lignin-grafted copolymers, namely lignin-graft-poly(methyl methacrylate-co-butyl acrylate) (lignin-g-P(MMA-co-BA)), are synthesized via "grafting from" atom transfer radical polymerization (ATRP) with the aid of lignin-based macroinitiators. By manipulating the monomer feed ratios of MMA/BA, grafted copolymers with tunable glass transition temperatures (-10-40 °C) are obtained. These copolymers are evaluated as sustainable thermoplastic elastomers (TPEs). The results suggest that the mechanical properties of these TPEs lignin-g-P(MMA-co-BA) copolymers are improved significantly by comparing with those of linear P(MMA-co-BA) copolymer counterparts, and the elastic strain recovery is nearly 70%. Lignin-g-P(MMA-co-BA) copolymers exhibit high absorption in the range of the UV spectrum, which might allow for applications in UV-blocking coatings.
authors.affiliation: Institute of Chemical Industry of Forestry Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization, Key and Laboratory on Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China; Institute of Forest New Technology, CAF, Beijing, 100091, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Yu
authors.forename: Jifu
authors.initials: J
authors.lastname: Wang
authors.forename: Chunpeng
authors.initials: C
authors.lastname: Wang
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Liu
authors.forename: Yuzhi
authors.initials: Y
authors.lastname: Xu
authors.forename: Chuanbing
authors.initials: C
authors.lastname: Tang
authors.forename: Fuxiang
authors.initials: F
authors.lastname: Chu
mesh_terms: D020724:Elastomers / Q000138:chemical synthesis / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D020724:Elastomers; D008768:Methylmethacrylates; C506478:poly(methyl methacrylate-co-(n-butyl acrylate)); D008031:Lignin
keywords: UV absorption; lignin; star polymer; thermoplastic elastomer