V-shaped gradient copolymer and preparation process thereof

Abstract

The invention discloses a V-shaped gradient copolymer and a preparation process thereof. According to the copolymer and the preparation process, an emulsion polymerization system is used, a reversible addition fragmentation chain transfer free radical polymerization technology is adopted, a series of gradient copolymers in a V-shaped molecular chain structure are prepared through a step-by-step sectional charging method, and the series of gradient copolymers can serve as multi-shaped memory materials. According to the copolymer and the preparation process, devices are simple, the course is environmentally friendly and energy-saving, raw materials are cheap and easy to obtain, and the unique gradient copolymer has a good multi-shaped memory function, can serve as a high polymer material with the excellent performance and has broad application prospects in fields such as biological medicine, aerospace and mechanics and electronics.

Description

technical field

[0001] The invention relates to a copolymer, in particular to a gradient copolymer with a V-shaped molecular chain structure. Background technique

[0002] Gradient copolymer is a new type of copolymer with unique structure and performance composed of two or more copolymerized units. Its molecular structure is characterized by the gradient change of the structural units that make up the polymer as the molecular chain extends. Different from the sudden change in the composition of the block copolymer at the connection point, the gradient copolymer is slow in the composition change of the entire molecular chain; and different from the random distribution of the composition of the random copolymer in the entire molecular chain, its composition Significant changes have taken place with the extension of the molecular chain. The unique molecular chain structure endows gradient copolymers with unique physical properties, such as thermodynamic properties, mechanica...

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