Transcrystalline induced by MWCNTs and organic nucleating agents at the interface of glass fiber/polypropylene

Abstract

The interfacial crystallization at glass fiber/PP interface in the presence of multiwalled cabon nanotubes (MWCNTs) and organic nucleating agents (NAs) along fiber surface was investigated in this study. MWCNTs and NAs formed a uniform coating layer on glass fiber surface via dipping in well‐dispersed MWCNTs and NAs aqueous dispersions. Transcrystalline (TC) structure formed by the strong nucleating ability of MWCNTs/NAs coated glass fiber surface. There existed a detectable difference in TC structure induced by coated glass fiber with different surface components. We found that a more sufficient and higher density transcrystalline (TC) structure can be constructed by introducing MWCNTs in combination with sodium benzoate (SB) or TMB‐5 onto fiber surface. Interfacial adhesion was evaluated by interfacial shear strength (IFSS) and morphologies at interfacial region after microdroplet test. The result shows that the MWCNTs/NAs coated glass fiber relates to better interfacial adhesion indicating that enhanced interfacial adhesion derives from the sufficient and high density TC structure induced by MWCNTs and NAs. Our current work provides an effective pathway to construct TC structure and further enhances interfacial adhesion of glass fiber/polypropylene composites. POLYM. COMPOS., 39:3424–3433, 2018. © 2017 Society of Plastics Engineers

Mechanical and thermal properties and crystallization behavior of PA66 composites reinforced with MWCNTs-coated milled glass fiber

“…He et al 9 revealed that thickness and weight fraction of MWCNTs on the GF surface could be modulated by controlling the CVD conditions, and the obtained MWCNTs-GF/epoxy composites showed greatly improved electrical conductivity, thermo-mechanical, and flexural properties. Ye et al 10 prepared a uniform coating layer composed of MWCNTs and organic nucleating agents (NAs) on the GF surface via the dipping process and then studied the crystallization of the MWCNTs-GF/Polypropylene interface. It was found that the introduction of MWCNTs and NAs on the GF surface could construct a high-density transcrystalline structure, which helps to enhance the interfacial adhesion of GF/Polypropylene composites.…”

High improvement of interfacial and mechanical properties in reinforcedPPcomposite by grafting polyethyleneimine modified carboxylicmulti‐walledcarbon nanotubes on short carbon fiber

“…The complete TC layer was an important factor for improving interfacial performance and enhancing mechanical properties. 44 And the isothermal crystallization POM images of CF/PP composites without PP-g-MAH were shown in Figure S2, which had almost same results. It was noteworthy that the PEI-CNT-CF/PP (with PP-g-MAH) had denser TC structure.…”

Glass fiber reinforced and β‐nucleating agents regulated polypropylene: A complementary approach and a case study

“…Figure (c,d1) showed the enlarged micrograph of the composite samples of the marked area in red dashed lines. In Figure (c,d), it was observed that the detached GFs surface of the fractured GF/PP composite was pretty smooth, indicating a relatively poor interfacial adhesion between GFs and PP matrix . Noticeably, an obvious enhancement of the interfacial adhesion was observed for GF/β‐PP composite based on the observation that a layer of remnant matrix polymer was adhered on the fractured GFs surface [Figure (d,d)].…”