Acrylic latex interpenetrating polymer

Viscoelastic Properties of Acrylic Latex Interpenetrating Polymer Networks as Broad Temperature Span Vibration Damping Materials... 

L. H. Sperling, J. A. Grates, J. E. Lorenz, and D. A. Thomas, Noise damping with methacrylate/acrylate latex interpenetrating polymer networks, Polym. Prepr. Am. Chem. Soc. Div. Polym. Chem. 16(1), 274 (1975). Methacrylic/acrylic latex IPNs. Broad-temperature noise-damping characteristics. 

J. A. Grates, D. A. Thomas, E. C. Hickey, and L. H. Sperling, Noise and Vibration Damping with Latex Interpenetrating Polymer Networks, /. Appl Polym. Sci. 19(6), 1731 (1975). Latex IPNs for sound damping. Methacrylic/acrylic compositions. 

L. H. Sperling, T. W. Chiu, and D. A. Thomas, Glass-Transition Behavior of Latex-Interpenetrating Polymer Networks Based on Methacrylic-Acrylic Pairs, J. Appl. Polym. Sci. 17(8), 2443 (1973). Polyacrylate/polymethacrylate latex IPNs. Glass transition and damping behavior. 

Yan et al. [52] explored the use of IPN techniques to produce a composite vinyl-acrylic latex. The first-formed polymer was produced using VAc and divinyl benzene (DVB), while the second formed polymer constituted a BA/DVB copolymer. In both cases the DVB was added at 0.4 wt%. They compared this product with another product, a bidirectional interpenetrating netwodc (BIPN) in which VAc was again polymerized over the first IPN. They noted that the compatibility between the phases was more pronounced in the BIPN than in the IPN as determined using dynamic mechanical measurements and C nuclear magnetic resonance spectroscopy. The concept of polymer miscibility has also been used to produce composite latex particles and thus modify the pafamance properties of VAc latexes. Bott et al. [53] describe a process whereby they bloid VAc/ethylene (VAc/E) copolymers with copolymers of acrylic acid or maleic anhydride and determine windows of miscibility. Apparently an ethyl acrylate or BA copolymer with 10-25 wt% AA is compatible with a VAc/E copolymer of 5-30 wt% ethylene. The information obtained from this woik was then used to form blends of latex polymers by polymerizing suitable mixtures of monomers into preformed VAc/E copolymers. The products are said to be useful for coating adhesives and caulks. 

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