Infrared spectroscopy interpenetrating polymer

Rossi et al. [30] evaluated rheologically mucins of different origin with polyacrylic acid and sodium carboxymethyl cellulose. The same group also reported a novel rheological approach based on a stationary viscoelastic test (creep test) to describe the interaction between mucoadhesive polymers and mucins [31,32]. Jabbari et al. [33] used attenuated total-reflection infrared spectroscopy to investigate the ehain interpenetration of polyaciylic acid in the mucin interface. 

This is not the case of real-time infrared (RTIR) spectroscopy, " a technique that permits one to look at the chemical processes by monitoring in situ the disappearance of the monomer reactive group upon UV exposure. By this technique conversion versus time curves have been directly recorded for polymerizations occurring within a fraction of a second. RTIR spectroscopy proved also well suited to study the photopolymerization of monomer mixtures, which leads to the formation of copolymers or interpenetrating polymer networks, as it allows the disappearance of each type of monomer to be accurately followed in the course of the reaction. The performance of the three analytical techniques most commonly used to follow in real time high-speed photopolymerizations are summarized in Table 1. 

Journal of Applied Polymer Science 59, No.9, 28th Feb.1996, p.1417-26 POLYMERISATION KINETICS OF POLYURETHANE AND VINYL ESTER RESIN INTERPENETRATING POLYMER NETWORKS BY USING FOURIER TRANSFORM INFRARED SPECTROSCOPY... 

Several analytical techniques have been used to characterize the polymer/ silane coupling agent interphase. Culler et aL [2] used Fourier transform infrared (FT-IR) spectroscopy to characterize the chemical reactions at the matrix/silane interphase of composite materials. They correlated the extent of reaction of the resin with the coupling agent (as determined by FT-IR) with the extent of interpenetration. Culler et al. [2] have also used observations of improved resistance of the interphase region to solvent attack as indirect evidence to support the interpenetrating network theory. 

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