Related Experiment Video
Updated: Sep 11, 2025
09:22
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
7.9K
Zero-zero-birefringence polymer using N-substituted maleimide and styrene
Applied Optics
|August 12, 2025
Summary
Researchers studied alternating copolymers of N-substituted maleimide (RMI) and styrene (St). They found a nonlinear relationship between photoelastic coefficient, glass transition temperature, and composition, achieving a zero-birefringence polymer with high Tg and low haze.
Area of Science:
- Polymer Science
- Materials Science
- Optics
Background:
- Birefringence in alternating copolymers, specifically orientational and photoelastic properties, remains underexplored.
- N-substituted maleimide (RMI) and styrene (St) alternating copolymers present a novel system for investigating these properties.
Purpose of the Study:
- To investigate the orientational and photoelastic birefringence of RMI-St alternating copolymers.
- To analyze the relationship between copolymer composition and properties like refractive index and glass transition temperature (Tg).
Main Methods:
- Synthesis and characterization of N-substituted maleimide and styrene alternating copolymers.
- Measurement of birefringence, refractive index, and glass transition temperature (Tg) as a function of composition.
Main Results:
- A nonlinear relationship was observed between the photoelastic coefficient, Tg, and the RMI/St composition ratio.
- A specific copolymer composition of N-ethylmaleimide and styrene yielded a zero-birefringence polymer.
- This zero-birefringence polymer demonstrated a high Tg and low haze.
Conclusions:
- The study provides detailed insights into the birefringence of RMI-St alternating copolymers.
- Tailoring the composition allows for the development of polymers with specific optical and thermal properties.
- The achievement of a zero-birefringence polymer with desirable characteristics opens avenues for advanced material applications.
More Related Videos
06:56Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry
Published on: June 10, 2018
25.5K
06:49Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
Published on: April 22, 2016
11.9K
Related Concept Videos
01:26Polymer Classification: Stereospecificity
2.6K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.6K
01:27Radical Substitution: Allylic Bromination
5.3K
In organic synthesis, the formation of products can be altered by changing the reaction conditions. For example, a dibromo addition product is formed when propene is treated with bromine at room temperature. In contrast, propene undergoes allylic substitution in non-polar solvents at high temperatures to give 3-bromopropene. In order to avoid the addition reaction, the bromine concentration must be kept as low as possible throughout the reaction. This can be achieved using N-bromosuccinimide...
5.3K
01:13Olefin Metathesis Polymerization: Overview
2.2K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.2K
01:24Characteristics and Nomenclature of Copolymers
2.7K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.7K
00:53Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.0K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.0K
01:00Characteristics and Nomenclature of Homopolymers
3.3K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
3.3K