ResearchSpace
→
Browsing by Author

Browsing by Author "Ojijo, Vincent O"

Now showing items 1-20 of 42

Next Page

Analytical techniques to quantify modifiers in bitumen for the South African asphalt pavement industry

Author: Makhari, A ; Hawes, Nomashaka BN ; Mturi, George AJ ; Ojijo, Vincent O Date: Jul 2021 Modifying bitumen is currently a common practice in South Africa. The asphalt pavement industry has seen an increase in use of different types of modifiers in an attempt to improve or extend the properties of bitumen. Common modifiers used ... Read more
A brief overview of layered silicates and polymer/layered silicate nanocomposite formation

Author: Ray, Suprakas S ; Ojijo, Vincent O Date: Feb 2018 Layered silicate-containing polymer nanocomposites attract great interest in today’s advanced composite materials research because it is possible to achieve impressive property improvements when compared with neat polymers or conventional ... Read more
Cellulose nanostructure-based biodegradable nanocomposite foams: A brief overview on the recent advancements and perspectives

Author: Motloung, Mpho P ; Ojijo, Vincent O ; Bandyopadhyay, Jayita ; Ray, Suprakash S Date: Jul 2019 The interest in designing new environmentally friendly materials has led to the development of biodegradable foams as a potential substitute to most currently used fossil fuel–derived polymer foams. Despite the possibility of developing ... Read more
The Circular Economy as Development Opportunity: Exploring Circular Economy Opportunities across South Africa’s Economic Sectors

Author: Godfrey, Linda K ; Nahman, Anton ; Oelofse, Suzanna HH ; Trotter, Douglas ; Khan, Sumaya ; Nontso, Zintle ; Magweregwede, Fleckson ; Sereme, Busisiwe V ; Okole, Blessed N ; Gordon, Gregory ER ; Brown, Bernadette ; Pillay, Boyse ; Schoeman, Chanel ; Fazluddin, Shahed ; Ojijo, Vincent O ; Cooper, Antony K ; Kruger, Daniel M ; Napier, Mark ; Mokoena, Refiloe ; Steenkamp, Anton J ; Msimanga, Xolile P ; North, Brian C ; Seetal, Ashwin R ; Mathye, Salamina M Date: Dec 2021 The intention of this book is to present the CSIR’s position and interpretation of the circular economy, and to use it to drive discussions on where immediate circular economy opportunities are achievable in South Africa. Opportunities that ... Read more
Compatibilization of polymer blends by shear pulverization

Author: Ojijo, Vincent O ; Kesavan Pillai, Sreejarani Date: 2020 Solid-state shear pulverization (SSSP) is a relatively new high-pressure and shear deformation technique, which relies on mechanochemical reactions between polymer chains in solid state. One of it applications is in the compatibilization of ... Read more
Concurrent Enhancement of Multiple Properties in Reactively Processed Nanocomposites of Polylactide/Poly[(butylene succinate)-co-adipate] Blend and Organoclay

Author: Ojijo, Vincent O ; Ray, Suprakas S ; Sadiku, R Date: May 2014 Polylactide (PLA) and poly[(butylene succinate)-co-adipate] (PBSA) were reacted by being blended in a batch mixer in the presence of a chain extender, triphenyl phosphite (TPP), and two different types of organically modified clays—a ... Read more
Correlations between fibre diameter, physical parameters, and the mechanical properties of randomly oriented biobased polylactide nanofibres

Author: Selatile, Mantsopa K ; Ray, Suprakas S ; Ojijo, Vincent O ; Sadiku, R Date: Jan 2019 In this study, the tensile properties of systematically optimised, biodegradable polylactide (PLA) electrospum fibres are investigated in order to illuminate the influences of the factors that affect their mechanical properties such as fibre ... Read more
Crystallization and thermal properties of Polylactide/Palygorskite composites

Author: Kesavan Pillai, Sreejarani ; Ojijo, Vincent O ; Ray, Suprakas S Date: Jun 2014 Polylactide palygorskite (fibrous clay) composites were prepared by solvent casting method. Both pristine and organically modified palygorskite were used for composite preparation. The detailed crystallization behavior, morphology, and thermal ... Read more
Depth filtration of airborne agglomerates using electrospun bio-based polylactide membranes

Author: Selatile, Mantsopa K ; Ray, Suprakas S ; Ojijo, Vincent O ; Sadiku, R Date: Feb 2018 We have investigated the filtration properties of electrospun bio-based polylactide air filter membranes by studying the kinetics of filtration and the influence of fiber diameter, fiber size, and the nature of dust particles on the depth of ... Read more
Development of bacterial-resistant electrospun polylactide membrane for air filtration application: Effects of reduction methods and their loadings

Author: Selatile, Mantsopa K ; Ojijo, Vincent O ; Sadiku, R ; Ray, Suprakas S Date: May 2020 The antimicrobial activity of fibrous membranes with electrospun polylactide (PLA)/silver nanoparticles (AgNPs) depends on the accessibility of the AgNPs, among other factors. The challenge is therefore to develop a suitable method for loading ... Read more
The distribution of nanoclay particles at the interface and their influence on the microstructure development and rheological properties of reactively processed biodegradable polylactide/poly(butylene succinate) blend nanocomposites

Author: Salehiyan, Reza ; Ray, Suprakas S ; Sinha Roy, Jayita ; Ojijo, Vincent O Date: Aug 2017 The present work investigates the distribution of nanoclay particles at the interface and their influence on the microstructure development and non-linear rheological properties of reactively processed biodegradable polylactide/poly(butylene ... Read more
Effect of nanoclay loading on the thermal and mechanical properties of biodegradable Polylactide/Poly[(butylene succinate)- co-adipate] blend composites

Author: Ojijo, Vincent O ; Ray, Suprakas S ; Sadiku, R Date: Apr 2012 Polylactide/poly[(butylene succinate)-co-adipate] (PLA/PBSA)-organoclay composites were prepared via melt compounding in a batch mixer. The weight ratio of PLA to PBSA was kept at 70:30, while the weight fraction of the organoclay was varied ... Read more
Effect of nanoclay on optical properties of PLA/clay composite films

Author: Cele, HM ; Ojijo, Vincent O ; Chen, H ; Kumar, S ; Land, K ; Joubert, T ; De Villiers, MFR ; Ray, SS Date: Jun 2014 This article reports the modification of optical properties of biodegradable/biocompatible polylactide (PLA) using organically modified montmorillonite (OMMT) for microcantilever applications. PLA/OMMT composite films with various OMMT loadings ... Read more
Effect of the mode of nanoclay inclusion on morphology development and rheological properties of nylon6/ethylevinyl-alcohol blend composites

Author: Bandyopadhyay, Jayita ; Ray, Suprakas S ; Salehiyan, Reza ; Ojijo, Vincent O ; Khoza, Mary N ; Wesley-Smith, James Date: Sep 2017 During melt extrusion of nanocomposites, nanoparticles can be incorporated either directly or through the masterbatch, which brings up a simple question of how the mode of nanoparticle inclusion affects the morphology and hence the rheological ... Read more
Impact of melt-processing strategy on structural and mechanical properties: Clay-containing polypropylene nanocomposites

Author: Morajane, D ; Ray, Suprakas S ; Sinha Roy, Jayita ; Ojijo, Vincent O Date: Feb 2018 Processing conditions (e.g., temperature profile, feed point, screw speed, feed rate, and screw element configuration) and how nanocomposites are prepared in the extruder have a vital effect on the dispersion of nanoclay. The resultant ... Read more
Improving wear resistance of polyolefins

Author: Ojijo, Vincent O ; Sadiku, ER Date: Jun 2017 This chapter discusses the strategies employed in enhancing the wear performance of polyethylene (PE) and polypropylene (PP). A brief overview of the polyolefins, their structure, and tribological characteristics and applications is presented. ... Read more
The influence of blend ratio on the morphology, mechanical, thermal, and rheological properties of PP/LDPE blends

Author: Mofokeng, Tladi G ; Ojijo, Vincent O ; Ray, Suprakas S Date: Oct 2016 This paper reports on how the blend ratio and morphology influence the mechanical, thermal, thermomechanical, and rheological properties of poly(propylene) (PP)/low density polyethylene (LDPE) blends. The blend morphology is composed of the ... Read more
The influence of filler surface modification on mechanical and material properties of layered double hydroxide -containing polypropylene composites

Author: Moyo, Lumbidzani ; Ray, Suprakas S ; Sebati, Ngwanamohuba W ; Ojijo, Vincent O Date: Mar 2017 The processing and properties of layered double hydroxides (LDHs)-containing polypropylene (PP) composites have been studied extensively. However, no detailed studies have reported on how stearic acid (SA)-intercalated and SA-coated LDHs ... Read more
Introduction to nanomaterials and polymer nanocomposite processing

Author: Ojijo, Vincent O ; Sinha Ray, Suprakash Date: Feb 2018 Polymer nanocomposites are a relatively new class of material containing components with at least one dimension less than 100 nm. This chapter provides an introduction to these polymer nanocomposites and their relationship to microcomposites. ... Read more
Kinetically controlled localization of carbon nanotubes in polylactide/poly(vinylidenefluoride) blend nanocomposites and their influence on electromagnetic interference shielding, electrical conductivity, and rheological properties

Author: Salehiyan, Reza ; Nofar, M ; Ray, Suprakash S ; Ojijo, Vincent O Date: Jul 2019 This study illustrates the effects of the kinetic parameters [processing time, polyvinylidene fluoride (PVDF) viscosity, carbon nanotube (CNT) aspect ratio, and processing method] on the CNT migration and consequently the viscoelastic properties, ... Read more

Now showing items 1-20 of 42

Next Page

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.