Properties and structure of polymer concrete composite material with divinyl benzene as a crosslinking agent

Abstract

A study has been performed to determine the effect of the use of divinyl benzene(DVB) as a crosslinking agent in polymeric binders consisting of mixtures of styrene, acrylonitrile, and acrylamide, on the thermal stability and structure of polymer concretes(PC), containing sand and cement as an aggregate. The results indicate that the inclusion of DVB results in improvements in the thermal and mechanical stability. The improvements are attributed to three‐dimensional cross‐linking of the polymer due to the inclusion of DVB. The influence of the sand‐cement ratio on the structure of PC samples at 240°C are also discussed.

Some theoretical considerations on the long‐term stability of polymer concrete composites in reactive environments

“…T h e deterioration of t h e molecular structure occurs initially in the bonds which have a relatively low activation energy. The polymer properties "X" are dependent on the concentration "nb" of the bonds per unit volume of the polymer, x = f ( n d (1) According to the law of mass action, the rate of variation of the concentration of these bonds due to the influence of the reactive medium is proportional to the mass volume of the polymer concrete to reactive media and can be expressed as follows:…”

Synergistic Development of Natural Rubber/Butyl Rubber Composites for Improved Interfacial Bonding and Enhanced Shock-Absorbing Capabilities

“…Such adjustment can also diminish the cationic acidity of allyl, thereby reducing chain transfer reactions with monomers or solvents . Meanwhile, adding a specific amount of cross-linking agent during polymerization can both increase the product’s molecular weight and stabilize copolymer properties …”

“…34 Meanwhile, adding a specific amount of cross-linking agent during polymerization can both increase the product's molecular weight and stabilize copolymer properties. 35 This research embarks on highly unsaturated butyl rubber, distinguished by a significantly high IP binding content. Drawing from the pioneering work on low unsaturated butyl rubber, namely, IIR 1953 by Shandong Chambroad Sinopoly New Materials Co., Ltd., our approach introduces minimal quantities of cross-linking agents, specifically 1,5-hexadiene (Hex) and divinylbenzene (DVB).…”

“… 34 Meanwhile, adding a specific amount of cross-linking agent during polymerization can both increase the product’s molecular weight and stabilize copolymer properties. 35 …”

In situ gelation of aqueous sulfuric acid solution for fuel cells

“…In this work, stable acid hydrogels were prepared from aqueous H 2 SO 4 solution by in situ polymerization for fuel cell applications. Owing to the resistance of the aromatic skeleton to acids and temperature, 18 divinylbenzene (DVB) was employed as a cross-linker to synthesize the gels. Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) observations were employed to characterize structures of the acid hydrogels.…”