Some Industrial Applications of Soft Condensed Matter in High-Performance Polymers Processing

Author(s):  
Paul Smith

Author(s):  
Sengshiu Chung ◽  
Peggy Cebe

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.



Author(s):  
A. L. Rusanov ◽  
L. G. Komarova ◽  
M. P. Prigozhina ◽  
V. A. Tartakovsky ◽  
S. A. Shevelev ◽  
...  


Author(s):  
Burcu Batak ◽  
Gülce Çakmak ◽  
William M. Johnston ◽  
Burak Yilmaz


2021 ◽  
Vol 27 ◽  
pp. 31-38
Author(s):  
Francesco Gagliardi ◽  
Giuseppina Ambrogio ◽  
Romina Conte ◽  
Pietro Russo


2020 ◽  
Vol 27 (6) ◽  
pp. 2195-2202
Author(s):  
El Hadji Ndongo Diaw ◽  
Severine Le Roy ◽  
Gilbert Teyssedre ◽  
Eddy Aubert


Author(s):  
Arozo Ahmadi ◽  
Istabrak Dörsam ◽  
Helmut Stark ◽  
Silke Hersey ◽  
Christoph Bourauel ◽  
...  




2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Robert Christie ◽  
Adrian Abel

Abstract This chapter provides an overview of the structural and synthetic chemistry, and the industrial applications, of dioxazine pigments, a small group of high performance organic pigments. The color violet (or purple) has frequently assumed a prominent position in history, on account of its rarity and cost. The natural colorant Tyrian purple and the first synthetic textile dye, Mauveine, are prime examples of this unique historical feature. CI Pigment Violet 23, also referred to as Dioxazine Violet or Carbazole Violet, is one of the most universally used organic pigments, by far the most important industrial pigment in the violet shade area. Dioxazine Violet is also unique as the dominant industrial violet pigment providing a brilliant, intense violet color and an excellent all-round set of fastness properties. The pigment has a polycyclic molecular structure, originally described wrongly as a linear arrangement, and later shown to adopt an S-shaped arrangement on the basis of X-ray structural analysis. Two other dioxazine pigments are of rather lesser importance. The synthesis and manufacturing route to CI Pigment Violet 23 is described in the review. Finally, a survey of the principal current applications of the individual dioxazine pigments is presented.



2011 ◽  
Vol 217-218 ◽  
pp. 1606-1610
Author(s):  
Dong Jiang ◽  
Xiao Ran Zhang ◽  
Yan Mei Ma ◽  
Cheng You Ma

A series of random polysulfone/polyethersulfone (PSF/PES) copolymers were synthesized by the polycondensation of 4, 4'-isopropylidendiphenol, 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-dichlorodiphenyl sulfone in the presence of K2CO3. We obtained a series of copolymers by changing the molar ratio of 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-isopropylidendiphenol (it was marked as the ratio of S:A). The copolymers have the similar solubility with polyethersulfone. They also have high glass transition temperatures (Tg: 199°C~229°C) and 5% weight loss temperatures (4, 4'-isopropylidendiphenol: 4, 4΄-dihyolroxy diphenyl sulfone=1:1, Td5=497°C). At the same time the elongation at break is much higher than that of PES, while the tensile strength is a little lower than that of PES.



2004 ◽  
Vol 16 (3) ◽  
pp. 381-390 ◽  
Author(s):  
Meghan Spence ◽  
James A. Newell ◽  
Michael Lynch ◽  
T. J. Lee ◽  
Jenn Demetrio ◽  
...  


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