Estimation of Initial Conditions of a Prepolymer for a Solid-State Step-Growth Polymerization Process

2010 ◽  
Vol 4 (9-10) ◽  
pp. 613-620 ◽  
Author(s):  
Yuesheng Ye ◽  
Kyu Yong Choi
Keyword(s):  
Solid State ◽  
Initial Conditions ◽  
Polymerization Process ◽  
Step Growth ◽  
Step Growth Polymerization

Poly(phenylene sulfide) – some news on an old polymerization

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Michael Haubs ◽  
Reinhard Wagener
Keyword(s):  
Kinetic Model ◽  
High Performance ◽  
Polymerization Process ◽  
Cleavage Reaction ◽  
Chain Cleavage ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Considerable Discussion ◽  
End Group ◽  
Phenylene Sulfide

AbstractHigh performance thermoplastic poly(p-phenylene sulfide) (PPS) is commercially produced from sodium sulfide and p-dichlorobenzene:Na-S-Na + Cl-(C6H4)-Cl → -[C6H4S]- + 2 NaClAt a first glance, this looks like a classical step growth polymerization of the A-A + B-B type. There has been considerable discussion and scientific investigation about the reaction mechanism. Today, it is accepted that PPS polymerization is a step growth polymerization with chain length dependent end group reactivities. This paper suggests to add a polymer chain cleavage reaction to the known kinetic model in order to improve the fit of experimental observation and modeling results. Implications of this reaction kinetic model for the design and engineering of an optimized PPS polymerization process are discussed.

scholarly journals Resin and carbon foam production by cationic step-growth polymerization of organic carbonates

2017 ◽  
Vol 8 (2) ◽  
pp. 404-413 ◽  
Author(s):  
L. Wöckel ◽  
A. Seifert ◽  
C. Mende ◽  
I. Roth-Panke ◽  
L. Kroll ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Controlled Release ◽  
Carbon Foam ◽  
Organic Carbonates ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Foam Production

Acid induced step-growth polymerizations of bis(p-methoxybenzyl) carbonate (pMBC), bis(m-methoxybenzyl) carbonate (mMBC) and difurfuryl carbonate (DFC) have been performed to produce resin-foams, because controlled release of carbon dioxide takes place during polymerization of those organic carbonates.

Designing Soft Reactive Adhesives by Controlling Polymer Chemistry

MRS Bulletin ◽  
2003 ◽  
Vol 28 (6) ◽  
pp. 424-427 ◽  
Author(s):  
Agnès Aymonier ◽  
Eric Papon
Keyword(s):  
Automotive Industry ◽  
Ease Of Use ◽  
Large Strains ◽  
Structural Adhesives ◽  
Wide Range ◽  
Step Growth ◽  
Visible Irradiation ◽  
Step Growth Polymerization ◽  
Uv Visible ◽  
Activation Heat

AbstractSoft reactive adhesives (SRAs) are polymer-based materials (e.g., polyurethanes, polysiloxanes, polydienes) designed to be further vulcanized or slightly cross-linked through external activation (heat, moisture, oxygen, UV–visible irradiation, etc.), either at the time of their application or within a subsequent predefined period. They are used mainly as mastics, or sealing compounds, in a wide range of industrial and commercial fields such as construction, footwear, and the automotive industry. Generally deposited as thick films, SRAs behave as structural adhesives; their low elastic moduli accommodate large strains between the bonded parts without incurring permanent damage. Other outstanding attributes of SRAs are their resistance to solvents, their ability to withstand aggressive environments, and their ease of use. This article discusses examples of SRAs and, more specifically, shows how the cross-linking chemistry, mainly through step-growth polymerization, provides their primary advantages.

Hollow Microspherical Carbazole-Based Conjugated Polymers by Photoinduced Step-growth Polymerization

2021 ◽  
Author(s):  
Tugba Celiker ◽  
Ali Suerkan ◽  
Sinem Altinisik ◽  
Mert Akgun ◽  
Sermet Koyuncu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Three Dimensional ◽  
Metal Free ◽  
Step Growth ◽  
Step Growth Polymerization

A new photochemical approach for the synthesis of metal-free three-dimensional hollow spherical conjugated polymers is described. Irradiation of solutions containing specially designed monomer, namely 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) possessing both carbazole and...

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