Physico-chemical studies on polymethyl methacrylate alite composite

Abstract

The influence of methyl metharcylate and gamma exposure dose on the physico-chemical and mechanical properties of polymer-alite composite have been investigated. The hardened alite samples were impregnated with a methyl methacrylate monomer and then subjected to Y irradiation doses from 10-50 KGy. The effect of polymer loading (%), compressive strength, bulk density and the microstructure (scanning electron microscopy SEM), in addition IR spectra were studied. The results indicate that, polymer loading, compressive strength and bulk density increase with increasing absorbed dose. This is attributed to the deposition of the polymer in the pores of the samples. SEM showed the voids between the particles in the samples before the impregnation, whereas, the formation of new products in the pores appeared after impregnation.

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

“…As a result, the amount of the solid part deposited in the pores system increased. The resulting polymer modified cement mortars specimens also prevented the formation of micro‐cracks, thereby improved the impermeability characteristics of the mortar cement composites . In addition, the total porosity percentage of the SAE‐latex blended cement mortar composite containing 20% waste glass is less than that of the composite without waste glass.…”

“…Usually, crosslinking is the most important effect of polymer irradiation because it can improve the mechanical, thermal, and chemical properties of preformed parts as well as bulk materials ; The first observation appears that the compressive strength values of SAE‐latex blended cement mortar composites containing 20% WG (80OPC‐20WG‐100SS‐10%SAE) is higher than that of SAE‐latex cement mortar composite (100OPC‐100SS‐10%SAE) without any additive of waste glass. This is due to the addition of WG particles, which seems to encourage the growth of the interaction between the SAE polymer and hydrated products of cement during irradiation process.…”

Controllable synthesis of monoacrylate‐modified adsorption resins and enhancing adsorption toward fermentation inhibitors from rice straw hydrolysate

“…S1 in Supporting information) illustrated that the modified resin had reduced porosity as demonstrated by the reduced number of holes, voids and micro‐defects compared with unmodified resin. This may be attributed to the fact that in the copolymerization process, some monoacrylate undergoes self‐polymerization to form polyacrylate on the pores or voids in the St‐DVB adsorption resin surface …”

“…It can be observed from Table that with the amount of MMA increased, the BET surface area is decreased from 380.03 m 2 g −1 to 280.50 m 2 g −1 and the pore diameter is increased from 11.01 nm to 13.03 nm. It can be explained that in the copolymerization process, part of the MMA monomers have undergone self‐polymerization to form polymethyl methacrylate (PMMA) on the pores or voids in the St‐DVB adsorption resin surface . In addition, the presence of MMA decreased the thermodynamic affinity between the polymer and the porogens, which resulted in the porogens producing larger pores with PMMA compared with St‐DVB copolymers .…”

“…This may be attributed to the fact that in the copolymerization process, some monoacrylate undergoes self-polymerization to form polyacrylate on the pores or voids in the St-DVB adsorption resin surface. 27,28 The textural properties of modified and unmodified St-DVB adsorption resin were investigated by N 2 adsorption-desorption isotherm experiments. All adsorption isotherms can be classified as type IV (Fig.…”