Browsing University of Waterloo by Author "Penlidis, Alexander"
Now showing items 1-20 of 25
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Binary vs. Ternary Reactivity Ratios: Appropriate Estimation Procedures with Terpolymerization Data
Scott, Alison J.; Penlidis, Alexander (Elsevier, 2018-08-01)There is a widely accepted analogy between copolymerization and terpolymerization mechanisms that has allowed researchers to use reactivity ratios obtained for binary pairs (from copolymerization experiments) in models ... -
Binary vs. ternary reactivity ratios: Appropriate estimation procedures with terpolymerization data
Scott, Alison J.; Penlidis, Alexander (Elsevier, 2018-08-01)There is a widely accepted analogy between copolymerization and terpolymerization mechanisms that has allowed researchers to use reactivity ratios obtained for binary pairs (from copolymerization experiments) in models ... -
Case Studies with Mathematical Modeling of Free-radical Multi-component Bulk/Solution Polymerizations:Part 2
Dorschner, David; Jung, Woosung; Riahinezhad, Marzieh; Duever, Thomas; Penlidis, Alexander (Taylor & Francis, 2017)In Part 2 of this series of two extensive overviews of multi-component polymerization case studies, we again present mathematical modeling results with experimental confirmations. Part 2 represents a refinement and ... -
Case studies with mathematical modelling of free radical multicomponent bulk/solution polymerizations. Part 1.
Jung, Woosang; Riahinezhad, Marzieh; Duever, Thomas; Penlidis, Alexander (Taylor & Francis, 2015-07)In part 1 of this series of two extensive overviews of multi-component polymerization case studies, we present mathematical modelling results with experimental confirmations. The case studies are from free-radical, bulk ... -
Continuous Modification of Polypropylene Via Photoinitiation
Amintowlieh, Yasaman; Tzoganakis, Costas; Penlidis, Alexander (Wiley, 2015-07-03)A twin screw extruder was used for continuous modification of polypropylene (PP) via UV radiation. Long chain branches were incorporated in the PP backbone to modify its rheological properties. Benzophenone (BPH) as ... -
Design of Polymeric Materials: Experiences and Prescriptions
Scott, Alison J.; Penlidis, Alexander (Wiley, 2020-12-23)As process engineering has matured, research interest has shifted towards polymer product quality. In the past 20 years or so, the shift has progressed even further, as interest in polymer product quality has morphed into ... -
Designing Optimal Terpolymers for Enhanced Oil Recovery (Polymer Flooding)
Scott, Alison J.; Penlidis, Alexander (ACS, 2020-03-20)Terpolymers of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AAm) and acrylic acid (AAc) have significant potential to be used in polymer flooding for enhanced oil recovery. Our earlier work has explored ... -
Designing Polymeric Sensing Materials for Analyte Detection and Related Mechanisms
Stewart, Katherine M.E.; Penlidis, Alexander (Wiley, 2016-02)A systematic approach is used to design and tailor sensing materials for targeted analytes and specific applications. An example is used to demonstrate how potential sensing materials can be designed based on the chemical ... -
Designing Polymeric Sensing Materials: What are we Doing Wrong?
Stewart, Katherine M.; Penlidis, Alexander (Wiley, 2016-08-31)Gas analytes, or volatile organic compounds (VOCs), interact with polymeric sensing materials through various sensing mechanisms. The dominant sensing mechanisms are discussed for different types of VOCs, which are ... -
Evaluation of Doped and Undoped Poly (o-anisidine) as Sensing Materials for a Sensor Array for Volatile Organic Compounds
Stewart, Katherine M. E.; Scott, Alison J.; Penlidis, Alexander (Wiley, 2020-06-02)Poly (o-anisidine) (PoANI) and PoANI doped with nickel oxide and zinc oxide were evaluated as sensing materials for four gas analytes (methanol, ethanol, acetone, and benzene). The sensing materials had high sensitivity ... -
Evaluation of Polymeric Nanocomposites for the Detection of Toxic Gas Analytes
Stewart, Katherine M.E.; Penlidis, Alexander (Taylor & Francis, 2016-09)Four different metal oxide nanoparticles, copper oxide (CuO), aluminum oxide (Al2O3), nickel oxide (NiO), and titanium dioxide (TiO2), were added to poly (2,5-dimethyl aniline) (P25DMA) during synthesis to create different ... -
Heuristic Search Strategy for Transforming Microstructural Patterns to Optimal Copolymerization Recipes
Mohammadi, Yousef; Saeb, Mohammad Reza; Penlidis, Alexander (Wiley, 2018-03-12)Manipulation and optimization of copolymer microstructure for tailoring final properties is of great importance in macromolecular science and engineering. Uncovering the complexities of the interrelationships between ... -
Hierarchical Data Analysis for the Characterization of Polymeric Materials: Linking Measurements and Statistical Methodology
Filipovic, Nicholas; Scott, Alison J.; Penlidis, Alexander (ASEE, 2021-01-01)As future chemical engineers, it is important that students be able to identify and quantify sources of error. A statistical analysis technique that is often overlooked is hierarchical design methodology, which allows for ... -
Indium Oxide Doped Polyaniline for Detection of Formaldehyde
Mavani, Bhoomi Het; Penlidis, Alexander (Wiley, 2022-06-22)Polyaniline (PANI) and a polyaniline derivative (poly (2,5-dimethyl aniline)) were evaluated for their sensitivity towards formaldehyde. Among the two polymer backbones evaluated, polyaniline seemed more sensitive towards ... -
Intelligent Monte Carlo: A new paradigm for inverse polymerization engineering
Mohammadi, Yousef; Saeb, Mohammad Reza; Penlidis, Alexander; Jabbari, Esmaiel; Zinck, Philippe; Stadler, Florian; Matyjaszewski, Krzysztof (Wiley, 2018-05)Traditional computational methods simulate the microstructure of polymer chains from input reaction conditions, but a need exists for predicting optimum reaction conditions in a computationally-demanding multi-variable ... -
Molecular Architecture Manipulation in Free Radical Copolymerization: An Advanced Monte Carlo Approach to Screening Copolymer Chains with Various Comonomer Sequence Arrangements
Saeb, Mohammad Reza; Mohammadi, Yousef; Pakdel, Amir; Penlidis, Alexander (Wiley, 2016-07-01)A Kinetic Monte Carlo (KMC) simulation approach was adopted in this study to capture evolutionary events in the course of free radical copolymerization, through which batch and starved-feed semibatch processes were compared. ... -
Operational maps between molecular properties and environmental stress cracking resistance (ESCR)
Sardashti, P.; Stewart, K. M. E.; Polak, M.; Tzoganakis, C.; Penlidis, Alexander (Wiley, 2019-01-20)Environmental stress cracking (ESC) is one of the main failure mechanisms involved in polymer fractures. This paper focusses on the environmental stress cracking resistance (ESCR) of polyethylene (PE) in which ESC occurs ... -
An Overview of the Potential of UV Modification of Polypropylene
Amintowlieh, Yasaman; Tzoganakis, Costas; Penlidis, Alexander (Wiley, 2016-02)UV radiation with a photoinitiator has been utilized to modify polypropylene (PP). Factors affecting solid state photomodification were studied and the optimal processing conditions for formation of three different structures ... -
Polymerization Data Mining: A Perspective
Mohammadi, Yousef; Penlidis, Alexander (Wiley, 2019-04-01)Nowadays, ‘Data mining’ is widely proposed by data scientists as the most accepted and powerful approach to properly handle the information explosion. Data mining is defined as the extraction of interesting patterns and ... -
The Role of pH, Ionic Strength and Monomer Concentration on the Terpolymerization of 2-Acrylamido-2-methylpropane Sulfonic Acid, Acrylamide and Acrylic Acid
Scott, Alison J.; Duever, Thomas A.; Penlidis, Alexander (Elsevier, 2019-08-26)The current study examines the effects of important factors (namely, pH, ionic strength and monomer concentration) on the terpolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AAm) and acrylic ...