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Molecular Weight of Step-Growth Polymers

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...

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Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures

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Published on: April 11, 2017

Multifunctional, Highly Flexible, Free-Standing 3D Polypyrrole Foam.

Chunhui Wang¹, Yujie Ding¹, Ye Yuan¹

¹Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)

|July 1, 2016

Summary

Researchers created a flexible, multifunctional 3D polypyrrole foam using electrodeposition. This robust material has a unique structure, making it suitable for various applications.

Keywords:

highly flexible multifunctional polymer foams sensors supercapacitors

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Last Updated: Mar 18, 2026

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Published on: February 18, 2022

Area of Science:

Materials Science
Electrochemistry
Polymer Science

Background:

Developing advanced materials with unique structural properties is crucial for emerging technologies.
Polypyrrole (PPy) is a conductive polymer with potential applications in various fields.
Fabricating complex 3D structures of conductive polymers remains a challenge.

Purpose of the Study:

To fabricate a multifunctional, highly flexible 3D polypyrrole (PPy) foam.
To investigate the structural properties and robustness of the fabricated 3D PPy foam.
To explore the potential of using nickel foam as a template for PPy foam synthesis.

Main Methods:

A simple electrodeposition method was employed for material fabrication.
Nickel foam was utilized as a sacrificial template to create the 3D structure.
Characterization techniques were used to analyze the foam's interior structure and flexibility.

Main Results:

A multifunctional, highly flexible 3D polypyrrole (PPy) foam was successfully fabricated.
The 3D PPy foam exhibits a unique and intricate interior architecture.
The material demonstrated sufficient robustness for direct manipulation.

Conclusions:

The electrodeposition method using nickel foam is an effective approach for creating advanced 3D PPy foam structures.
The resulting 3D PPy foam possesses desirable properties such as flexibility and robustness.
This fabricated material holds promise for applications requiring multifunctional and structurally unique conductive foams.