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Types of Step-Growth Polymers: Polyesters

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...

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多功能迪醇单体用于多尺度,可回收的光驱添加剂制造.

Benjamin R Nelson^1,2, Jaxon T Cione¹, Bruce E Kirkpatrick^1,2,3

¹Department of Chemical and Biological Engineering, University of Colorado Boulder Boulder CO 80303 USA christopher.bowman@colorado.edu.

Polymer chemistry

|April 10, 2025

概括

研究人员开发了一种新的四功能单体,用于先进的增材制造. 这种可回收的材料使得高分辨率的3D打印具有或没有光启动器,形成可适应的网络.

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Published on: February 18, 2022

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科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
添加剂制造添加剂制造添加剂制造

背景情况:

光聚合对于增材制造至关重要,它可以实现精确的3D对象创建.
开发具有可调节性质的可回收树脂对于可持续制造至关重要.

研究的目的:

为了合成和表征一种新的四功能单体,用于基于光的增材制造.
研究开发的单体的光聚合行为和可回收性.
为了展示使用新材料的高分辨率3D打印功能.

主要方法:

合成脂酸五甲基醇乙氧酸盐,一个四功能单体,含有1,2-二硫乙烯基组.
在光发起剂的存在和缺席下进行光聚合研究.
增材制造使用动态光处理和双光子光刻.
通过加热和溶剂稀释回收聚合物网络回到单体.

主要成果:

四功能单体成功经过光聚合,与线性二硫化物形成共价适应性网络.
打印了高分辨率的3D部件,其特征尺寸低至1微米,跨度从厘米到微米.
聚合网络被回收,约有95%的单体回收.
与初始聚合相比,回收的单体的再聚合产生了与初始聚合相比几乎相同的模量演变.

结论:

一种新的四功能迪西奥兰单体已成功开发用于增材制造.
单体使光聚合能够在有或没有外源光发起剂的情况下进行光聚合,提供了多功能性.
由此产生的共价适应性网络是可回收的,证明了对3D打印树脂的可持续方法.
这项工作推进了可回收树脂和多功能单体的领域,用于高分辨率的增材制造.