Related Experiment Video
Updated: Jul 13, 2026
07:06
Methods for the Self-integration of Megamolecular Biopolymers on the Drying Air-LC Interface
Published on: April 7, 2017
Structure-LCST relationships for end-functionalized water-soluble polymers: an "accelerated" approach to phase
Satyasankar Jana1, Steven P Rannard, Andrew I Cooper
1Department of Chemistry, University of Liverpool, Crown Street, Liverpool, UK L69 3BX.
Chemical Communications (Cambridge, England)
|July 12, 2007
Summary
A new high-throughput method accurately measures the lower critical solution temperature (LCST) in water-soluble polymers. This technique reveals how minor end-group variations impact polymer behavior in aqueous solutions.
Area of Science:
- Polymer Chemistry
- Materials Science
- Physical Chemistry
Background:
- Understanding polymer aqueous phase behavior is crucial for applications like drug delivery and biomaterials.
- Poly(2-(dimethylamino)ethyl methacrylate) is a thermoresponsive polymer with potential applications.
- Characterizing the lower critical solution temperature (LCST) is key to predicting polymer behavior.
Purpose of the Study:
- To develop a novel high-throughput technique for precise LCST measurement.
- To investigate the influence of subtle end-group modifications on polymer aqueous phase behavior.
- To analyze the thermoresponsive properties of water-soluble poly(2-(dimethylamino)ethyl methacrylate).
Main Methods:
- Development of a high-throughput screening platform for LCST determination.
- Synthesis of poly(2-(dimethylamino)ethyl methacrylate) with varied end-group compositions.
- Utilizing the developed technique to measure LCST values for different polymer variants.
Main Results:
- The novel technique successfully measured LCST with high throughput.
- Subtle changes in end-group composition were identified as significant factors affecting aqueous phase behavior.
- A clear correlation was established between end-group structure and the polymer's LCST.
Conclusions:
- The developed high-throughput method is effective for characterizing polymer thermoresponsive behavior.
- End-group engineering offers a viable strategy to tune the aqueous phase behavior of water-soluble polymers.
- This work provides a foundation for designing advanced functional polymers for specific applications.
Related Concept Videos
01:03Step-Growth Polymerization: Overview
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
02:34Polymers
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
00:57Cationic Chain-Growth Polymerization: Mechanism
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
01:18Supercritical Fluid Chromatography
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
SFC utilizes a supercritical fluid mobile phase,...
01:14Polymer Classification: Architecture
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
01:08Molecular 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...
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...