Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.9K
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...
2.9K
Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

2.0K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
2.0K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.5K
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...
2.5K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.3K
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...
2.3K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.1K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Debonding mechanisms of fully grouted rock bolts driven by adhesive-ring cracking.

Scientific reports·2026
Same author

Magnetic-Field-Induced Synergistic Regulation of Lithium Deposition via Nucleation and Ion Transport Control in 3D Hosts.

ACS applied materials & interfaces·2026
Same author

Moderate Methionine Reduction Alleviates Lipopolysaccharide-Induced Stress in Broiler Chickens by Enhancing Antioxidant Pathways.

Animals : an open access journal from MDPI·2026
Same author

Beyond the neuron: Exosomes as intercellular modulators of mitochondrial networks in the pathogenesis and treatment of Alzheimer's disease.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026
Same author

Artificial intelligence-based multimodal multitask analysis of thyroid ultrasound image features predicts thyroid cancer: a multicenter study.

JNCI cancer spectrum·2026
Same author

Phage therapy targeting DNA-encapsulated membrane vesicle-producing intestinal symbiotic Klebsiella pneumoniae ameliorates autoimmune disease.

NPJ biofilms and microbiomes·2026

Related Experiment Video

Updated: Aug 27, 2025

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

8.1K

DPP-based polymers with linear/branch side chain for organic field-effect transistors.

Daohai Zhang1, Dongxu Liang2, Liang Gu2

  • 1School of Chemical Engineering of Guizhou Minzu University, Guiyang, China.

Frontiers in Chemistry
|September 30, 2022
PubMed
Summary

Molecular weight is more critical than aggregation for polymer semiconductor performance in organic field-effect transistors. Higher molecular weight polymers demonstrate superior charge carrier mobility, impacting device efficiency.

Keywords:
charge transport mobilitiesconjugated (conducting) polymersdonor–acceptor conjugated polymersorganic semiconductorpolymer

More Related Videos

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
10:16

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

Published on: January 8, 2016

14.0K
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

21.8K

Related Experiment Videos

Last Updated: Aug 27, 2025

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

8.1K
Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
10:16

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

Published on: January 8, 2016

14.0K
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

21.8K

Area of Science:

  • Materials Science
  • Organic Electronics
  • Polymer Chemistry

Background:

  • Polymer semiconductor properties are dictated by molecular weight and packing.
  • Donor-acceptor (D-A) polymers are key in organic electronics.
  • Understanding structure-property relationships is crucial for device optimization.

Purpose of the Study:

  • To investigate the impact of molecular weight and aggregation on carrier transport in D-A polymers.
  • To compare the performance of linear and branched D-A polymers in organic field-effect transistors (OFETs).
  • To determine the relative importance of molecular weight versus aggregation in OFET design.

Main Methods:

  • Synthesis of two D-A polymers (linear and branch) with similar backbones but different molecular weights and alkyl chains.
  • Fabrication and characterization of organic field-effect transistors using the synthesized polymers.
  • Analysis of charge carrier mobility in relation to polymer molecular weight and aggregation behavior.

Main Results:

  • The linear polymer showed better aggregation but lower hole mobility (1.1 × 10⁻² cm² V⁻¹ s⁻¹).
  • The branched polymer, despite lower aggregation, exhibited higher hole mobility (2.3 × 10⁻² cm² V⁻¹ s⁻¹).
  • Molecular weight was found to be a more dominant factor than aggregation ability.

Conclusions:

  • Molecular weight plays a more significant role than molecular aggregation in determining carrier transport efficiency in these polymer semiconductors.
  • Design strategies for polymer semiconductors in OFETs should prioritize molecular weight optimization.
  • This study provides valuable insights for developing high-performance organic electronic devices.