Organomodification of montmorillonite and its effects on the properties of poly(butylene succinate) nanocomposites

Abstract

The pristine sodium montmorillonite (MMT) was organically modified with hexadecyltrimethylammonium bromide (HTAB) at different contents. The organoclay was characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy, energy dispersive X‐ray techniques, and thermogravimetric analysis. Then, poly(butylene succinate) (PBS) nanocomposites were prepared by melt‐mixing process using maleic anhydride‐grafted PBS (PBS‐g‐MA) as compatibilizer. It was found that the mechanical properties of PBS nanocomposites filled with organoclay were apparently higher than that of the nanocomposite filled with MMT. This is attributed to the better filler–matrix interactions between PBS and the organoclay and the better filler dispersion. This is verifiable through the XRD, scanning electron microscopy, and transmission electron microscopy. The addition of PBS‐g‐MA further improved the mechanical properties. It was also found that our laboratory synthesized organoclay modified with HTAB has provided a better reinforcing efficiency when compared with the commercial octadecylamine‐modified organoclay. Besides that the thermal properties of PBS nanocomposites were studied through differential scanning calorimetry. POLYM. ENG. SCI., 2013. © 2013 Society of Plastics Engineers

Effects of organically modified nanoclay particles on the mechanical properties of aliphatic polyurethane/clay nanocomposite coatings

“…All the results illustrate that in order to achieve the best possible properties of polymerclay nanocomposites, obtaining a stable dispersion in which the silicate nanolayers are completely exfoliated in the polymeric matrix is a crucial consideration; therefore, during nanocomposite preparation, the evaluation and assessment of the morphology of these nanocomposites is of great importance [19][20][21][22][23][24][25][26][27]. Nano clay particles attributable to their extreme large surface-area/particle-size ratio tend to strongly agglomerate, so there have been many researches for agglomeration reduction by surface modification of nanoparticles [28][29][30][31].…”

Thermal and Mechanical Properties of Poly(butylene succinate) Films Reinforced with Silica

“…This may be due to the improved interaction between PBS and silica. For the composite films without PBS-g-GMA, it shows that x c increased with the addition of 1%wt of silica becuase silica acted as a nucleating agent, and then decreased by increasing the silica content possibly due to aggregation of silica particles, thus resulting in slowing down of the mobility of PBS chains [7]. …”

Preparo de nanocompósitos de poli(succinato de butileno) (PDS) e argila motmorilonita organofílica via polimerização in situ

“…Além disso, o fato da argila organofílica ter um maior espaçamento basal permite que o polímero possa ser intercalado entre as camadas, resultando no nanocompósito polímero / argila organofílica. A literatura reporta o preparo de nanocompósitos de PBS e argila principalmente por meios mecânicos, como a extrusão [12,13] . Por outro lado, a técnica de polimerização in situ, contribui para uma melhor dispersão da carga, pois o polímero é sintetizado em meio a esta [14] , permitindo a obtenção de estruturas esfoliadas, capazes de conferir melhores propriedades ao material [15] .…”