Mechanical and interfacial properties of compatibilized polyurethane blends

Abstract

The effects of two different styrene‐ethylene/butylene‐styrene (SEBS; SEBS‐g‐MA) block copolymers as potential compatibilizers for thermoplastic polyurethane/isotactic polypropylene blends (TPU/iPP), at different composition were investigated. The compatibilizers involved are unfunctionalized SEBS and functionalized grades containing maleic anhydride grafted to the midblock (SEBS‐g‐MA). Compatibility of each TPU/iPP/SEBS and TPU/iPP/SEBS‐g‐MA polymer blend was compared investigating mechanical, morphological, thermal and interfacial properties. From the results of the interfacial surface free energy, SEBS‐g‐MA is optimal compatibilizer which located at the interface of TPU and iPP phase exhibited much better synergy and improved the compatibility between the TPU and iPP phase. Accordingly, TPU/iPP/SEBS‐g‐MA showed better mechanical properties (higher tensile strength, elongation at break, and E modulus) and finer and more stable morphologies that were clearly observed by scanning electron microscopy. The thermogravimetric analysis confirmed these results showing pronounced thermal stability by addition of functionalized compatibilizer. POLYM. ENG. SCI., 58:1911–1922, 2018. © 2017 Society of Plastics Engineers

Novel sustainable materials from waste plastics: compatibilized blend from discarded bale wrap and plastic bottles

“…The dimensions and structure of these globules were altered upon the addition of compatibilizer, which indicates the reduction in the surface energies of the respective polymer contact surfaces. 56 The reduction in the surface energy was plausibly achieved by the reaction of maleic anhydride with the PET chains followed by SEBS chain miscibility in the LLDPE phase 57 and showed a stranded LLDPE phase distributed in a sea of PET phase, which was also conrmed by the AFM modulus map. Atomic force microscopy was used for surface mapping based on the modulus of the samples, as mechanical analysis conrmed a large difference in the modulus between rPET (2960 MPa) and rLLDPE (182 MPa).…”

“…10D) due to the addition of a chain extender. 56 The incorporation of the chain extender during the melt processing further transformed the stranded so LLDPE phase to a co-continuous phase with a hard PET phase. A multifunctional oligomeric chain extender works as a crosslinking node for rPET chains and may form a three-dimensional structure with PET chains as its arms.…”

Study on the modification of HMX/TPU composites with metal‐phenolic network

“…19,20 Polyurethane (TPU) is often used as a binder for PBXs due to its excellent strength and toughness. 21 In this study, the MPN (Metal-Polymer-Network) coating was constructed through the chelation of GA (Gallic Acid) and iron ions to further coat the energetic materials. The MPN coating forms a uniform and dense layer on the substrate surface, effectively improving adhesion and durability.…”

“…The surface of HMX was coated by in situ polymerization, which greatly improved the performance 19,20 . Polyurethane (TPU) is often used as a binder for PBXs due to its excellent strength and toughness 21 …”

Effects of Compatibilizer and Airflow Field on the Formation of Helical Microfibers via Melt Blowing

“…In this study, two ways are adopted to increase the interfacial interaction between PP and TPU. The effects of adding compatibilizer (PP‐ g ‐MAH) to the polymer blends and modifying the melt‐blowing airflow field on the formation of helical microfibers are studied. Differential scanning calorimetry (DSC) and rheological test are used to investigate the miscibility of the polymer blends.…”