Oxidative polymerization of diphenyl disulfides with quinones: formation of ultrapure poly(p-phenylene sulfide)s

1990 ◽  
Vol 23 (4) ◽  
pp. 930-934 ◽  
Author(s):  
Eishun Tsuchida ◽  
Kimihisa Yamamoto ◽  
Mitsutoshi Jikei ◽  
Hiroyuki Nishide
Keyword(s):  
Oxidative Polymerization ◽  
Phenylene Sulfide

Synthesis of Poly(phenylene sulfide) by O2 Oxidative Polymerization of Methyl Phenyl Sulfide

1994 ◽  
Vol 27 (4) ◽  
pp. 1057-1060 ◽  
Author(s):  
Eishun Tsuchida ◽  
Eiichi Shouji ◽  
Fumiaki Suzuki ◽  
Kimihisa Yamamoto
Keyword(s):  
Oxidative Polymerization ◽  
Phenyl Sulfide ◽  
Methyl Phenyl Sulfide ◽  
Methyl Phenyl ◽  
Phenylene Sulfide

Why Synthesizing Poly(1,4-Phenylene Sulfide) through Oxidative Polymerization Has not so far Been Adopted as the Industrial Process

2017 ◽  
Vol 896 ◽  
pp. 47-56
Author(s):  
Ye Feng Liu ◽  
Yan Fen Li ◽  
Xiao Lan Yan ◽  
Jie Yan ◽  
Min Jiao Li ◽  
...  
Keyword(s):  
Industrial Production ◽  
Sodium Sulfide ◽  
Oxidative Polymerization ◽  
Industrial Process ◽  
Commercial Method ◽  
Preparation Route ◽  
Temperature And Pressure ◽  
Polymerization Method ◽  
Very High ◽  
Phenylene Sulfide

Synthesis of poly (1, 4-phenylene sulfide) (PPS) through oxidative polymerization seems promising to us. Comparing with current commercial method to poly (1, 4-phenylene sulfide) from 1, 4-phenylene sulfide and sodium sulfide (Phillips’ Method), there are many advantages of the oxidative polymerization method. For example, it can synthesize PPS at normal temperature and pressure; the yield of reaction is very high; it provides pure PPS without salt contamination. However, several years have passed away; synthesis of poly (1, 4-phenylene sulfide) through oxidative polymerization has not so far been adopted as the industrial process. Many of us are puzzled, why? Through studying all kinds of reported preparation route to poly (1, 4-phenylene sulfide) through oxidative polymerization compared to Phillips’ Method, a generic polymerization mechanism is achieved for most of them excepting two with obvious shortcomings. We suddenly realize that synthesis of poly (1, 4-phenylene sulfide) through oxidative polymerization seems unsuitable to be used in industrial production recently because of its own limits.

Synthesis of Highly Crystallized Poly(1,4-phenylene sulfide) via Oxygen-Oxidative Polymerization of Diphenyl Disulfide

2017 ◽  
Vol 90 (7) ◽  
pp. 843-846 ◽  
Author(s):  
Fuyuki Aida ◽  
Naoto Takasu ◽  
Yohei Takatori ◽  
Hiroyuki Nishide ◽  
Kenichi Oyaizu
Keyword(s):  
Oxidative Polymerization ◽  
Diphenyl Disulfide ◽  
Phenylene Sulfide

Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

1989 ◽  
Vol 47 ◽  
pp. 368-369
Author(s):  
Sengshiu Chung ◽  
Peggy Cebe
Keyword(s):  
Single Crystals ◽  
High Performance ◽  
Dilute Solution ◽  
Two Stage ◽  
Annealing Behavior ◽  
High Performance Polymers ◽  
Seeding Method ◽  
Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

Relation Between Local Structure, Electric Dipole and Charge Carrier Dynamics in DHICA Melanin, a Model for Biocompatible Semiconductors

2019 ◽  
Author(s):  
Micaela Matta ◽  
Alessandro Pezzella ◽  
Alessandro Troisi
Keyword(s):  
Electronic Structure ◽  
Degrees Of Freedom ◽  
Structural Model ◽  
Computational Study ◽  
Oxidative Polymerization ◽  
Radical Scavenging ◽  
Charge Carriers ◽  
Electronic Charge ◽  
Polymer Semiconductors ◽  
Synthetic Pigments

<div><div><div><p>Eumelanins are a family of natural and synthetic pigments obtained by oxidative polymerization of their natural precursors: 5,6 dihydroxyindole and its 2-carboxy derivative (DHICA). The simultaneous presence of ionic and electronic charge carriers makes these pigments promising materials for applications in bioelectronics. In this computational study we build a structural model of DHICA melanin considering the interplay between its many degrees of freedom, then we examine the electronic structure of representative oligomers. We find that a non-vanishing dipole along the polymer chain sets this system apart from conventional polymer semiconductors, determining its electronic structure, reactivity toward oxidation and localization of the charge carriers. Our work sheds light on previously unnoticed features of DHICA melanin that not only fit well with its radical scavenging and photoprotective properties, but open new perspectives towards understanding and tuning charge transport in this class of materials.<br></p></div></div></div>

Sign in / Sign up

Export Citation Format

Share Document