Ordering Rigid Rod Conjugated Polymer Molecules for High Performance Photoswitchers

Langmuir ◽  
2008 ◽  
Vol 24 (23) ◽  
pp. 13241-13244 ◽  
Author(s):  
Huanli Dong ◽  
Hongxiang Li ◽  
Erjing Wang ◽  
Zhongming Wei ◽  
Wei Xu ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
High Performance ◽  
Polymer Molecules ◽  
Rigid Rod

Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

1989 ◽  
Vol 47 ◽  
pp. 338-339
Author(s):  
W.W. Adams ◽  
S. J. Krause
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Liquid Crystalline ◽  
Molecular Level ◽  
Synergistic Effects ◽  
Tensile Modulus ◽  
Commercial Development ◽  
The Matrix ◽  
Molecular Composites ◽  
Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

Balance cathode-active and anode-active groups in one conjugated polymer towards high-performance all-organic lithium-ion batteries

Nano Energy ◽  
2021 ◽  
Vol 86 ◽  
pp. 106055
Author(s):  
Yang Zhao ◽  
Manman Wu ◽  
Hongbin Chen ◽  
Jie Zhu ◽  
Jie Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Conjugated Polymer ◽  
High Performance ◽  
Lithium Ion

Factors Controlling Hole Injection in Single Conjugated Polymer Molecules†

2009 ◽  
Vol 113 (16) ◽  
pp. 4739-4745 ◽  
Author(s):  
Leonid Fradkin ◽  
Rodrigo E. Palacios ◽  
Joshua C. Bolinger ◽  
Kwang-Jik Lee ◽  
William M. Lackowski ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Hole Injection ◽  
Polymer Molecules

An expanded isoindigo unit as a new building block for a conjugated polymer leading to high-performance solar cells

2014 ◽  
Vol 2 (15) ◽  
pp. 5427-5433 ◽  
Author(s):  
Shugang Li ◽  
Zhongcheng Yuan ◽  
Jianyu Yuan ◽  
Ping Deng ◽  
Qing Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Building Block ◽  
Conjugated Polymer ◽  
High Performance ◽  
Fill Factor ◽  
Solar Cell Device ◽  
Donor Acceptor ◽  
First Time

An expanded isoindigo unit (IBTI) has been incorporated into a donor–acceptor conjugated polymer for the first time. The PCE of the solar cell device based on the new polymer reached 6.41% with a fill factor of 0.71.

Morphology of Rigid-Rod Molecular Composites: An Overview

1988 ◽  
Vol 134 ◽  
Author(s):  
Stephen J. Krause
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Morphological Characterization ◽  
High Ratio ◽  
Structure Property ◽  
Chain Polymer ◽  
Specific Strength ◽  
Composite Systems ◽  
Molecular Composites ◽  
Rigid Rod

ABSTRACTRigid-rod molecular composites are a new class of high performance structural polymers which have high specific strength and modulus and also high thermal and environmental resistance. A rigid-rod, extended chain polymer component is used to reinforce a matrix of a ductile polymer with the intent of achieving a “composite” on the molecular level. After synthesis, the key to producing a molecular composite is to control morphology to disperse the reinforcing rod molecules as finely as possible in the matrix polymer. Individual rod molecules or bundles of molecular rods must have dimensions which result in a high ratio of length to width (aspect ratio) for efficient reinforcement. To achieve this, the reinforcing rod component must not phase separate at any stage of processing. Morphological characterization techniques, which can measure the orientation and dispersion (or, conversely, the degree of phase separation) of rod molecules provide the tools for correlating theoretically predicted and experimentally observed mechanical properties. Various morphological techniques which have been applied to molecular composite systems will be reviewed, including wide angle x-ray scattering and scanning and transmission electron microscopy. Structure-property correlations for molecular composite systems will be discussed with regard to models for mechanical properties. Application of new morphological techniques will also be discussed.

scholarly journals Semi-metallic, strong and stretchable wet-spun conjugated polymer microfibers

2015 ◽  
Vol 3 (11) ◽  
pp. 2528-2538 ◽  
Author(s):  
Jian Zhou ◽  
Er Qiang Li ◽  
Ruipeng Li ◽  
Xuezhu Xu ◽  
Isaac Aguilar Ventura ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conjugated Polymer ◽  
High Performance ◽  
Wet Spinning ◽  
Hot Drawing ◽  
Polymer Microfibers

High-performance conjugated polymer microfibers were fabricated via wet-spinning followed by hot-drawing. With a combination of solvent doping and de-doping, we achieved a record electrical conductivity of 2804 S cm−1.

Phototransistors of a Rigid Rod Conjugated Polymer

2008 ◽  
Vol 112 (49) ◽  
pp. 19690-19693 ◽  
Author(s):  
Huanli Dong ◽  
Hongxiang Li ◽  
Erjing Wang ◽  
Hiroshi Nakashima ◽  
Keiichi Torimitsu ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Rigid Rod

Charge Injection and Photooxidation of Single Conjugated Polymer Molecules

2004 ◽  
Vol 126 (13) ◽  
pp. 4116-4117 ◽  
Author(s):  
So-Jung Park ◽  
Andre J. Gesquiere ◽  
Ji Yu ◽  
Paul F. Barbara
Keyword(s):  
Conjugated Polymer ◽  
Charge Injection ◽  
Polymer Molecules

High Aspect Ratio Conjugated Polymer Nanowires for High Performance Field-Effect Transistors and Phototransistors

ACS Nano ◽  
2015 ◽  
Vol 9 (5) ◽  
pp. 5264-5274 ◽  
Author(s):  
Hyun Ah Um ◽  
Dae Hee Lee ◽  
Dong Uk Heo ◽  
Da Seul Yang ◽  
Jicheol Shin ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Conjugated Polymer ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Polymer Nanowires
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