Characterization of Highly Cross-linked Polymers by S. S. Labana

By S. S. Labana

content material: Formation and houses of polymer networks : experimental and theoretical reviews / J.L. Stanford, R.F.T. Stepto, and R.H. nonetheless --
laptop simulation of end-linked elastomers : sol-gel distributions at excessive extents of response / Yu-Kwan Leung and B.E. Eichinger --
Rheological alterations throughout the copolymerization of vinyl and divinyl monomers / D.T. Landin and C.W. Macosko --
Elastomeric poly(dimethylsiloxane) networks with various short-chain segments / J.E. Mark and J.G. Curro --
gentle scattering of randomly cross-linked polystyrene / Kanji Kajiwara and Walther Burchard --
Correlation networks in polymeric fabrics decided via small-angle neutron scattering / L.H. Sperling, A.M. Fernandez, and G.D. Wignall --
Carboxyl-terminated butadiene-acrylonitrile-modified epoxy resin and its graphite fiber-reinforced composite : morphology and dynamic mechanical homes / Su-Don Hong, Shirley Y. Chung, George Neilson, and Robert F. Fedors --
Mechanical habit of a few epoxies with epoxidized usual oils as reactive diluents / Shahid Qureshi, J.A. Manson, J.C. Michel, R.W. Hertzberg, and L.H. Sperling --
quantity restoration in aerospace epoxy resins : results on time-dependent houses of carbon fiber-reinforced epoxy composites / Eric S.W. Kong --
constitution and fracture of hugely cross-linked networks / J.D. Lemay, B.J. Swetlin, and F.N. Kelley --
Fractographic impression of glassy natural networks / D.T. Turner --
Peroxide cross-linked ordinary rubber and cis-polybutadiene : characterization by way of high-resolution solid-state carbon-13 NMR / Dwight J. Patterson and Jack L. Koenig --
Carbon-13 magic perspective NMR spectroscopic reviews of an epoxy resin community / A. Cholli, W.M. Ritchey, and Jack L. Koenig --
NMR kinetic research of polyethylene-peroxide cross-linking reactions / V.D. McGinniss and J.R. Nixon --
Degradation chemistry of basic cross-links in high-solids tooth finishes : solar-assisted hydrolysis / Alan D. English and Harry J. Spinelli --
IR spectroscopic reviews of decay in cross-linked networks : photoenhanced hydrolysis of acrylic-melamine coatings / D.R. Bauer and L.M. Briggs --
Electron spin resonance (ESR) of photodegradation in polymer networks : photoinitiation expense size via nitroxide termination / John L. Gerlock, David R. Bauer, and L.M. Briggs --
hugely cross-linked CR-39 polycarbonate and its degradation by means of high-energy radiation / J.L. Cercena, J. Groeger, A.A. Mehta, R. Prottas, J.F. Johnson, and S.J. Huang.

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ACS Symposium Series; American Chemical Society: Washington, DC, 1984. Vinyl and Divinyl Copolymerization LANDIN A N D MACOSKO 11 1 1 1 1 1 1 -ι 1 r- S 01 0 Figure 3. point. Conversion Qualitative trend of parameter s up to the gel 2E-5 (0 ça Concentration of D i v i n y l Figure 4. Cumulative rate of cyclization vs. i n i t i a l con­ centration of EGDMA. ; ACS Symposium Series; American Chemical Society: Washington, DC, 1984. 44 HIGHLY CROSS-LINKED POLYMERS 1E6 Figure 5. V i s c o s i t y v s .

Of course, we would eventually like to be able to relate prop­ erties to structure directly by using a suitable dynamic theory of polymers. Reptation theory (15) i s one which may be of great val­ ue for this purpose in the future. Below we report a simple way to include cyclization in branch­ ing theory and some i n i t i a l results for viscosity and conversion measurements on a nonlinear radical polymerization. We find a useful correlation between viscosity and C M L . w M t n e ) W Experimental The chemical system studied was that of the network forming copol­ ymer ization of methyl methacrylate (Aldrich) with small amounts of ethylene glycol dimethacrylate (Monomer Polymer Laboratories).

F. τ. Stepto, i n Developments in Polymerization- 3, Edited by R. N. Haward, Applied Science, Essex, England, Chpt. 3. Michael Falk and Ruth E. Thomas, Can. J. , 52, 3285 (1974). Josef Mikešand Karel Dušek, Macromolecules, 15, 93 (1982). B. E. Eichinger, J. Chem. , 75, 1964 (1981); Β. E. Eichinger and J . E. Martin, J. Chem. , 69, 4595 (1978). Y. K. Leung and Β. E. Eichinger, Preprint, Div. of Polym. , 48, ooo, (1983). (11) P. J . Flory, Statistical Mechanics of Chain Molecules, Interscience, New York, 1969.

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