Photochemical Methods for the Preparation of Complex Linear and Cross-linked Macromolecular Structures

2011 ◽  
Vol 64 (8) ◽  
pp. 982 ◽  
Author(s):  
Mehmet Atilla Tasdelen ◽  
Yusuf Yagci
Keyword(s):  
Free Radical ◽  
Metal Nanoparticles ◽  
Radical Polymerization ◽  
Potential Application ◽  
State Of The Art ◽  
Controlled Radical Polymerization ◽  
Visible Range ◽  
Current State ◽  
Complex Linear ◽  
Synthetic Methodologies

In this contribution, the current state of the art is summarized and an overview of photoinitiating systems for both radical and cationic polymerizations and their potential application in the preparation of complex linear and cross-linked macromolecular structures are described. Recent relevant studies have been devoted to developing novel free radical and cationic photoinitiators having spectroscopic sensitivity in the near-UV or visible range. Photoinitiated controlled radical polymerization methods leading to tailor-made polymers with predetermined structure and architecture are briefly presented. Several synthetic methodologies for the preparation of epoxy and (meth)acrylate based formulations containing clay or metal nanoparticles are also summarized. The nanoparticles are homogenously distributed in the network without macroscopic agglomeration. Applicability to both free radical and cationic systems is demonstrated.

scholarly journals Methylenelactide: vinyl polymerization and spatial reactivity effects

2016 ◽  
Vol 12 ◽  
pp. 2378-2389 ◽  
Author(s):  
Judita Britner ◽  
Helmut Ritter
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Chain Transfer ◽  
Free Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Experimental Results ◽  
Cyclic Monomer ◽  
Vinyl Polymerization ◽  
Reversible Addition

The first detailed study on free-radical polymerization, copolymerization and controlled radical polymerization of the cyclic push–pull-type monomer methylenelactide in comparison to the non-cyclic monomer α-acetoxyacrylate is described. The experimental results revealed that methylenelactide undergoes a self-initiated polymerization. The copolymerization parameters of methylenelactide and styrene as well as methyl methacrylate were determined. To predict the copolymerization behavior with other classes of monomers, Q and e values were calculated. Further, reversible addition fragmentation chain transfer (RAFT)-controlled homopolymerization of methylenelactide and copolymerization with N,N-dimethylacrylamide was performed at 70 °C in 1,4-dioxane using AIBN as initiator and 2-(((ethylthio)carbonothioyl)thio)-2-methylpropanoic acid as a transfer agent.

Autonomous land vehicles

2005 ◽  
Vol 219 (1) ◽  
pp. 77-98 ◽  
Author(s):  
H Durrant-Whyte
Keyword(s):  
Potential Application ◽  
State Of The Art ◽  
Fire Fighting ◽  
Technology Application ◽  
Land Vehicle ◽  
Land Vehicles ◽  
Cargo Handling ◽  
Current State ◽  
Bush Fire

This paper describes the current state-of-the-art in autonomous land vehicle (ALV) systems and technology. Application of ALV systems span relatively structured domains in mining, cargo handling, and agriculture, through potential application in very unstructured tasks such as bush fire fighting, forestry, and defence. In this paper, four key functional ALV technology areas are identified and discussed. These are mobility, localization, navigation, and planning. The essential conclusion of this paper is that the necessary sensors, algorithms, and methods already exist to develop, demonstrate, and commercialize ALVs in many applications.

Controlled Radical Polymerization in Aqueous Dispersed Media

2006 ◽  
Vol 59 (10) ◽  
pp. 693 ◽  
Author(s):  
Maud Save ◽  
Yohann Guillaneuf ◽  
Robert G. Gilbert
Keyword(s):  
Free Radical ◽  
Emulsion Polymerization ◽  
Radical Polymerization ◽  
Large Scale ◽  
Colloidal Stability ◽  
Free Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Wide Range ◽  
Dispersed Media ◽  
Aqueous Dispersed Media

Controlled radical polymerization (CRP), sometimes also termed ‘living’ radical polymerization, offers the potential to create a wide range of polymer architectures, and its implementation in aqueous dispersed media (e.g. emulsion polymerization, used on a vast scale industrially) opens the way to large-scale manufacture of products based on this technique. Until recently, implementing CRP in aqueous dispersed media was plagued with problems such as loss of ‘living’ character and loss of colloidal stability. This review examines the basic mechanistic processes in free-radical polymerization in aqueous dispersed media (e.g. emulsion polymerization), and then examines, through this mechanistic understanding, the new techniques that have been developed over the last few years to implement CRP successfully in emulsion polymerizations and related processes. The strategies leading to these successes can thus be understood in terms of the various mechanisms which dominate CRP systems in dispersed media; these mechanisms are sometimes quite different from those in conventional free-radical polymerization in these media.

scholarly journals Synthesis of fluorinated phosphorus-containing copolymers and their immobilization and properties on stainless steel

RSC Advances ◽  
2021 ◽  
Vol 11 (60) ◽  
pp. 38189-38201
Author(s):  
Farzana Kousar ◽  
Stephen C. Moratti
Keyword(s):  
Stainless Steel ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Phosphonic Acid ◽  
Potential Application ◽  
Free Radical Polymerization ◽  
Phosphorus Containing

A series of fluorinated-phosphonic acid methacrylates were synthesized by free radical polymerization using heptadecafluorodecyl methacrylate (HDFDMA) and (dimethoxyphosphoryl) methyl methacrylate (DMPMM) monomers for potential application as anti-corrosion coatings.

Controlled radical polymerization of styrene with an oxazolidinyl- N -oxyl stable free radical

1999 ◽  
Vol 42 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Yozo Miura ◽  
Shiro Mibae ◽  
Hiroaki Moto ◽  
Norihiro Nakamura ◽  
Bunichiro Yamada
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Stable Free Radical
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