Synthesis and Thermoreversible Gelation of Coil-Rod Copolymers with a Dendritic Polyethylene Core and Multiple Helical Poly(γ-benzyl-L-glutamate) Arms

被引：2

作者：

Lu, Yuliang ^{[1
]}

Liu, Dongtao ^{[1
]}

Wei, Xinjie ^{[1
]}

Song, Jiming ^{[1
]}

Xiao, Qiaogang ^{[1
]}

Du, Kezheng ^{[1
]}

Shi, Xinbo ^{[2
,3
]}

Gao, Haiyang ^{[2
]}

机构：

[1] China Natl Offshore Oil Corp Energy Technol & Serv, Shenzhen Branch, Shenzhen 518067, Peoples R China

[2] Sun Yat Sen Univ, Sch Mat Sci & Engn, PCFM Lab, GD HPPC Lab, Guangzhou 510275, Peoples R China

[3] Chain Walking New Mat Technol Guangzhou Co Ltd, Guangzhou 511462, Peoples R China

来源：

POLYMERS | 2023年 / 15卷 / 22期

关键词：

dendritic polyethylene; poly(gamma-benzyl-L-glutamate); fibers; gelation; gels; CHAIN WALKING POLYMERIZATION; POLYPEPTIDE BLOCK-COPOLYMERS; STIMULI-RESPONSIVE VESICLES; ONE-POT SYNTHESIS; HYPERBRANCHED POLYETHYLENES; AMPHIPHILIC COPOLYMERS; DIBLOCK COPOLYMERS; POLYMERS; ETHYLENE; TRANSITION;

D O I：

10.3390/polym15224351

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Coil-rod copolymers with a dendritic polyethylene (DPE) core and multiple helical poly(gamma-benzyl-L-glutamate) (PBLG) arms (DPE-(PBLG)(n)) were prepared by palladium-catalyzed copolymerization in tandem with ring-opening polymerization (ROP). Macroinitiator (DPE-(NH2)(11)) was firstly prepared by the group transformation of DPE-(OH)(11) generated from palladium-catalyzed copolymerization of ethylene and acrylate comonomer. Coil-helical DPE-(PBLG)(11) copolymers were prepared by ROP of gamma-benzyl-L-glutamate-N-carboxyanhydride (BLG-NCA). These DPE-(PBLG)(11) copolymers could form thermoreversible gels in toluene solvent, and the dendritic topology of the DPE core increased the critical gelation concentrations. The self-assembled nanostructure of gels was fully characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), and wide-angle X-ray diffraction (WAXD), and the morphology of the fibrous structure was a twisted flat ribbon through a self-assembled nanoribbon mechanism. The self-assembled fibers formed by DPE-(PBLG(45))(11) are more heterogeneous and ramified than previously observed fibers formed by PBLG homopolymer and block copolymers.

引用

页数：12