scholarly journals PREPARATION OF HIGH PERFORMANCE POLYMER MATERIALS THROUGH INTERMOLECULAR COMPLEXATION

2011 ◽  
Vol 011 (9) ◽  
pp. 932-938 ◽  
Author(s):  
Qi WANG ◽  
Li LI ◽  
Ning CHEN ◽  
Yuan LIU ◽  
Shibing BAI
Keyword(s):  
High Performance ◽  
Polymer Materials ◽  
High Performance Polymer

scholarly journals Unique acrylic resins with aromatic side chains by homopolymerization of cinnamic monomers

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Motosuke Imada ◽  
Yasumasa Takenaka ◽  
Hidehito Hatanaka ◽  
Takeharu Tsuge ◽  
Hideki Abe
Keyword(s):  
High Performance ◽  
High Heat ◽  
Polymer Materials ◽  
Carbonyl Groups ◽  
Group Transfer ◽  
Molecular Weights ◽  
Acrylic Resins ◽  
Addition Polymerization ◽  
High Performance Polymer ◽  
Engineering Plastics

Abstract Cinnamic monomers, which are useful chemicals derived from biomass, contain α,β-unsaturated carbonyl groups with an aromatic ring at the β-position. Homopolymers synthesized by addition polymerization of these compounds are expected to be innovative bio-based polymer materials, as they have both polystyrene and polyacrylate structures. However, polymerization of these compounds by many methods is challenging, including by radical methods, owing to steric hindrance of the substituents and delocalization of electrons throughout the molecule via unsaturated π-bonding. Herein we report that homopolymers of these compounds with molecular weights (Mn) of ~18,100 g mol−1 and controlled polymer backbones can be synthesized by the group-transfer polymerization technique using organic acid catalysts. Additionally, these homopolymers are shown to have high heat resistance comparable to that of engineering plastics. Overall, these findings may open up possibilities for the convenient homopolymerization of cinnamic monomers to produce high-performance polymer materials.

scholarly journals The Influence of Pressure-Induced-Flow Processing on the Morphology, Thermal and Mechanical Properties of Polypropylene Blends

2021 ◽  
Vol 5 (3) ◽  
pp. 64
Author(s):  
Pengfei Li ◽  
Yanpei Fei ◽  
Shilun Ruan ◽  
Jianjiang Yang ◽  
Feng Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Polyamide 6 ◽  
Polymer Materials ◽  
Thermal And Mechanical Properties ◽  
High Performance Polymer ◽  
Polyolefin Elastomer ◽  
Induced Flow ◽  
Polypropylene Blends ◽  
Structure Research

The pressure-induced-flow (PIF) processing can effectively prepare high-performance polymer materials. This paper studies the influence of pressure-induced-flow processing on the morphology, thermodynamic and mechanical properties of polypropylene (PP)/polyamide 6 (PA6) blends, PP/polyolefin elastomer (POE) blends and PP/thermoplastic urethane (TPU) blends. The results show that pressure-induced-flow processing can significantly improve the thermodynamic and mechanical properties of the blends by regulating internal structure. Research shows that the pressure-induced-flow processing can increase the strength and the toughness of the blends, particularly in PP/TPU blends.

Type and Size Selectivity of Single-Walled Carbon Nanotubes by Phenylethynyl Terminated Imide Oligomers

2021 ◽  
Vol 4 (1) ◽  
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Single Walled Carbon Nanotubes ◽  
Polymer Materials ◽  
Size Selectivity ◽  
Single Walled Carbon ◽  
High Performance Polymer ◽  
Curing Agents ◽  
Experimental Findings ◽  
Walled Carbon Nanotubes

Aromatic polyimides are well-known as high-performance polymer materials which have excellent properties such as high thermal stability, strong mechanical strength, and superior chemical resistance. However, rigid backbones of oligomers and strong chain interactions result in lower processibility. Our molecular modeling suggests that the enhancement of nanotube solubilization is attributed to the formation of self-assembled intermolecular structures associated with the inclusion of curing agents, in conformity with experimental findings. On the other hand, isolation of single-walled carbon nanotubes (SWNTs) with specific chirality and diameter is critical for achieving optimum performances of SWNTs in various application. Our studies reveal that phenylethynyl terminated imide (PETi) oligomer selectively enriches metallic and semiconducting (6, 5) SWNT.

Comparison of Two Evaluating Methods for Establishing the Marginal Fit on Four Heat - Pressed Resin Inlays

2018 ◽  
Vol 69 (4) ◽  
pp. 890-893
Author(s):  
Sorana Baciu ◽  
Cristian Berece ◽  
Adrian Florea ◽  
Andrada Voina Tonea ◽  
Ondine Lucaciu ◽  
...  
Keyword(s):  
High Performance ◽  
Clinical Results ◽  
Marginal Fit ◽  
High Performance Polymer ◽  
Investigation Methods ◽  
Evaluating Methods

In this study were compared two investigation methods, a bi- and tri-dimensional techniques by examining the marginal fit pressed in (BioHPP) Inlays. The study pruved that the BioHPP is a high performance polymer which provides very good clinical results.

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