Influence of constituents on thermal properties of polymethacrylate derivatives–clay materials

Abstract

In this study, the solution‐mixing method was used to prepare polymethacrylate derivatives' (PaMAs) nanocomposites with kaolinite. It was observed that the resultant materials could include exfoliated, intercalated, and undispersed kaolinite depending on their XRD patterns. TEM micrographs also revealed that platy and tube structures of kaolinite and their stacked form would disperse in the PaMAs. Therefore, they were called PaMAs–kaolinite materials with mixed morphology. The effects caused by different types of PaMA, solvent, and clay (sepiolite and kaolinite) on the thermal properties of these materials were examined. When the thermal stability of the materials was compared on the basis of the functional groups in the PaMAs, it was seen that the materials of the linear PaMAs with kaolinite usually had better thermal stability than that of the ring PaMAs and also seen that the thermal stability of Kao‐PaMAs increased from PMMA to poly(ethyl methacrylate) (PEMA) and poly(butyl methacrylate) for linear PaMAs. The solvent type affected the thermal stability and the glass transition temperature of the PaMAs. It was found that THF is the most suitable solvent for increasing thermal stability of the PaMAs in the presence of kaolinite; however, it is difficult to say the same about their Tg temperatures. In addition, the thermal stabilities of PEMA and poly(2‐hydroxylethyl methacrylate) were higher in the presence of kaolinite in comparison with sepiolite. The results obtained in this study were explained by the utilization of the relationships among their solubility parameters and of the interactions among the PaMAs, clays, the modifier (octadecylamine) and solvents. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

Poly(vinyl alcohol) nanocomposites with sepiolite and heat‐treated sepiolites

“…Considering the studies on the nanocomposites with sepiolite, it is seen that polyurethane, 12 poly (hydroxyethyl acrylate), 13 and poly(sodium acrylate) 14 for in situ polymerization method; chitosan, 15 epoxy resin, 16,17 poly(dimetylsiloxane), 18,19 poly (ethyl methacrylate), and poly(2-hydroxyethyl methacrylate) 20 for solution dispersion; Nylon-6, 21 polypropylene 22 for melt intercalation and polypropylene 23 for supercritical CO 2assisted mixing have been used in the relevant experiments. Nanofibers of sepiolite have proved to yield substantial improvement for the mechanical properties 13,15,16,18,19 and thermal stability 12,15,17,20 of these polymers even at low filler levels.…”

Modified kaolinites-polyalkyl methacrylate nanocomposites: Exploring relations between solubility parameters and thermal properties forin situsolution polymerization

“…XRD patterns of the intercalated kaolinite compounds are given in Fig. except KaoNMF and KaoODA compounds that were characterized in our previous study . When the gallery space of kaolinite is intercalated by DMSO and KAc, the position of the 001 peak changes from 2 θ = 12.4° to about 7.9°.…”

“…Tetrahydrofuran (THF) was obtained from Riedel. The kaolinite sample was supplied from the Kalemaden Corporation in Turkey, which was characterized in the previous study .…”

Sulfolane Crystal Templating: A One-Step and Tunable Polarity Approach for Self-Assembled Super-Macroporous Hydrophobic Monoliths

“…The Hansen’s solubility parameters of PMMA, PBMA, ethyl acetate, dichloromethane, and liquid paraffin are 22.6, 20.1, 18.15, 20.2, and 16.6 J 0.5 cm –1.5 , respectively. The solubility parameter of PBMA was closer to the solubility parameters of the three solvents; thus, under the same reaction conditions, the PBMA cryogel had a higher absorption capacity.…”