Preparation and Characterization of Polyurethane Nanocomposites Using Vietnamese Montmorillonite Modified by Polyol Surfactants

Abstract

This study focuses on the preparation of thermoplastic polyurethane (TPU) nanocomposite using Vietnamese montmorillonite (MMT) as the reinforced phase. The MMT was previously modified by intercalating polyethylene oxide (PEO) and polyvinyl alcohol (PVA) molecules between the clay layers. X-ray diffraction (XRD) results of organoclays revealed that galleries of MMT were increased to 18.2 Å and 27 Å after their intercalation with PEO and PVA, respectively. Thermoplastic polyurethane (TPU) nanocomposites composed of 1, 3, 5, and 7%wt organoclays were synthesized. The result of XRD and transmission electron microscopic (TEM) analyses implied that the PEO modified MMT was well dispersed, at 3%wt, in polyurethane matrix. Fourier Transform Infrared Spectroscopic (FTIR) has confirmed this result by showing the hydrogenous interaction between the urethane linkage and OH group on the surface of silicate layer. Thermogravimetric (TG) showed that the organoclay samples also presented improved thermal stabilities. In addition, the effects of the organoclays on mechanical performance and water absorption of the PU nanocomposite were also investigated.

Synthesis and characterization of polyurethane–organoclay nanocomposites based on renewable castor oil polyols

“…5 1, 3 and 5 wt%). It thus appears that the interlayer spacing of the Cloisite 30B in all of the nanocomposites is larger than that in pure Cloisite 30B at the domain of 2h = 19-21, indicating that the polyurethane molecular chains are most likely intercalated and expand into the galleries of silicate layers to form a multilayered structure consisting of layers of polyurethane molecular chains alternating with layers of layered silicate [40,41]. …”

“…Furthermore, the interaction between the adsorbed PUs chain and the polar groups on the surface layers of clay has prevented the PUs crystallization [41].…”

Synthesis and properties of bone cement based on poly(methyl methacrylate) reinforced by organo-clay

“…Tiếp theo, hỗn hợp được rửa bằng nước cất để loại phần PEO nằm ở ngoài khoang sét và ly tâm thu sản phẩm đã được rửa. Ngoài ra nhằm so sánh hiệu quả của phương pháp biến tính nóng chảy thì đất sét N 757 cũng được biến tính PEO (ở tỷ lệ 10/3) bằng phương pháp dung dịch với quy trình được thực hiện như trong công bố trước đây của nhóm tác giả [16] .…”

Effect of Organo‐Modified Montmorillonite on the Morphology and Properties of SEBS/TPU Nanocomposites

“…TPU stands as a versatile group of polymers . They exhibit a wide range of physical properties, such as good mechanical and elastic properties, hardness, and thermal stability . Blending SEBS with TPU can improve the tensile strength, thermal stability, and polarity of SEBS.…”