Effect of solid state grinding on properties of PP/PET blends and their composites with carbon nanotubes

Abstract

In this study, it was aimed to improve electrical conductivity and mechanical properties of conductive polymer composites, composed of polypropylene (PP), poly(ethylene terephthalate) (PET), and carbon nanotubes (CNT). Grinding, a type of solid state processing technique, was applied to PP/PET and PP/PET/CNT systems to reduce average domain size of blend phases and to improve interfacial adhesion between these phases. Surface energy measurements showed that carbon nanotubes might be selectively localized at PET phase of immiscible blend systems. Grinding technique exhibited improvement in electrical conductivity and mechanical properties of PP/ PET/CNT systems at low PET compositions. Ground composites molded below the melting temperature of PET exhibited higher tensile strength and modulus values than those prepared above the melting temperature of PET. According to SEM micrographs, micron-sized domain structures were obtained with ground composite systems in which PET was the minor phase.

Selective Localization of MWCNT in Poly (Trimethylene Terephthalate)/Poly Ethylene Blends: Theoretical Analysis, Morphology, and Mechanical Properties

“…These features of PE are expected to improve and modify the properties of PTT on blending. The ability of MWCNT to improve properties of different polymer blend systems is known . Rejisha et al reported the improved mechanical, thermal, and morphological properties of polybutylene terephthalate/polycarbonate blends with the incorporation of MWCNTs .…”

“…The ability of MWCNT to improve properties of different polymer blend systems is known. [18][19][20] Rejisha et al reported the improved mechanical, thermal, and morphological properties of polybutylene terephthalate/polycarbonate blends with the incorporation of MWCNTs. [21] Arif et al reported the influence of MWCNT in the crystallisation rate of polycarbonate/polypropylene blend.…”

Interface modification of compatibilized polyethylene terephthalate/polypropylene blends: Effect of compatibilization on thermomechanical properties and thermal stability

“…PET provides higher temperature and fatigue resistance because of the stiffening action of the aromatic phenylene group in its chemical structure and is responsible for its high glass transition temperature. PET is capable of chemical reactions with polar polymers and polar interactions like hydrogen bonding because of the ester group . The polarity of these ester groups will improve the inter chain reaction of PET resulting in good mechanical properties.…”

Effects of carbon nanotube on mechanical, crystallization, and electrical properties of binary blends of poly(phenylene sulfide) and polyphthalamide

“…In addition, CNT with excellent conductivity performance was introduced into the blend; its effects on the mechanical properties, crystallization, and conductivity were investigated. Recently, more researchers focused on the composites of immiscible polymers blends filled with CNT, such as CNT-modified PP/HDPE [24], ABS/LCP [25], PA6/ABS [26], PA6/PS [27], PC/PS [28], PLA/PP [29], PP/PET [30], and PP/PC [31] blend systems. However, the scope of these research works was only limited to relatively low-temperature polymers.…”