Polymer Structure and Property

The time-dependent nature of migration and chemical reaction of free radicals [30] in irradiated polymers can play an important role in altering the polymer structure and properties, e.g., cross-link formation via reactive sites or chain scission, or postirradiation oxidative influences (irradiation in presence of air or oxygen). 

Before discussing the polymerization of monocylic olefins, a brief review of the preparation of polymers from bicyclohep-tenes will acknowledge their historical contribution with respect to polymerization catalysts, polymer structure and properties. Their monomer reactivity in polymerization is much faster than the reactivity of the less strained monocyclic olefins. Anderson (1) and Truett (2) polymerized norbornene... 

Collins S, Gauthier WJ, Corrigan JF, Nicholas NJ (1995) Elastomeric poly(propylene) influence of catalyst structure and polymerization conditions on polymer structure and properties. Macromolecules 28 3771-3778... 

Most suitable for electrically conducting materials such as carbon fibers, the electrochemical processes involve deposition of polymer coatings on the fiber surface through electrodeposition or electropolymerization techniques. The major advantage of these processes is that a uniform layer of controlled thickness and variable polymer structure and properties can be obtained by controlling the current and the solution concentration. 

Further variation is possible in the polymer structure and properties by using mixtures of the appropriate reactants such that the polymer chain can have different R and R groups. Thus polyamide structures of types XXXV and XXXVI are possible variations on structures XXXIII and XXXIV, respectively. A polymer such as XXXV or XXXVI has two different repeat units and is referred to as a copolymer the process by which it is synthesized is... 

B. R. Gelin, Molecular Modeling of Polymer Structures and Properties, Carl Hanser, Munich, Vienna (1994)... 

The use of specific interactions to control polymer structure and properties is a rapidly emerging field. We have assembled a group of authors at the forefront of this field that are smdying both the fundamental science inherent in polymer self-assembly and applications of this strategy to functional systems. This book is designed for researchers in a wide range of areas, and features both fundamental aspects and applications of these fascinating systems. 

Dwight, D.W. Fabish, T.J. Thomas, H.R., Photon, Electron, and Ion Probes of Polymer Structure and Properties," ACS Symposium Series 162, American Chemical Society, Washington, D.C., 1981, pp. 1-442. 

The monomer ratio in the copolymer has an effect on the polymer structure and properties, mainly on the degree of crystallinity and on the melting point. As normally produced, ETFE has about 88% of alternating sequences and a melting point of 270°C (518°F).63... 

In common with conventional surfactants, Inisurfs and Transurfs, Surfmers form micelles in aqueous solutions above the CMC. The organized monomer aggregates of colloidal dimension are microscopically heterogeneous and may affect polymerization kinetics and polymer structure and properties. 

Clark DT(1981)In Dwight DW, Fabish TJ (eds) Photons, electrons and ion probes of polymer structure and properties. Am Chem Soc Washington DC, p 255 (ACS Symposium Series 162)... 

Ziegler-NattaCatalysts 1230 26-5 Natural and Synthetic Rubbers 1230 26-6 Copolymers of Two or More Monomers 1232 26-7 Condensation Polymers 1232 26-8 Polymer Structure and Properties 1236 EssentialTerms 1239 Study Problems 1240... 

Ideally, a simultaneous interpenetrating network should have extensive mixing at the molecular level, even to the extent of forming one uniform phase. As with other polymer blends, blocks, and grafts, SIN s exhibit phase separation attributed to the low entropy of mixing of two polymers which limits interpenetration in the real case. Thus there is an apparent discrepancy between theory and practice however, the pursuit of the ideal has led to a new understanding of the ways that super-molecular structure can be controlled, and new understanding of the relationship between polymer structure and properties. 

In Photon, Electron, and Ion Probes of Polymer Structure and Properties Dwight, D., et al. ... 

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