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Polymers
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Effect of Fillers in Polymer Blends
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Effect of Fillers in Polymer Blends

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Composites and Nanocomposites".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 5240

Special Issue Editors

Dr. Ali Fazli

E-Mail Website
Guest Editor
Department of Chemical Engineering, Université Laval, Quebec, QC G1V 0A6, Canada
Interests: polymer processing; recycling; composites; rubber compounds
Special Issues, Collections and Topics in MDPI journals
Dr. Elnaz Esmizadeh

E-Mail Website
Co-Guest Editor
Assistant Research Officer, Durability and Service Life Prediction of Polymeric Materials, Construction Research Centre (CONST), National Research Council Canada, Ottawa, ON K1A 0R6, Canada
Interests: polymer durability; service life prediction of polymers; constructive polymers; eco-building; polymer composite; reinforcement
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colle

For decades, the introduction of fillers has been considered as a stimulating route for improving the properties of polymer blends (e.g., mechanical, thermal, chemical, etc.). There is rapidly growing interest in advanced polymer composite reinforced by various organic and/or inorganic fillers as a major area of polymer science and technology. The understanding of the effect of such additives on the processing and performance of polymer blends is crucial for creating high-performance polymers while retaining their ease of processing.

Topics of interest for this SI will include (but not be limited to) polymer nanocomposites, fiber-reinforced polymers, hybrid materials, biopolymers, polymer miscibility, polymer processing, and applications of polymer composites. The audience of this SI are primarily manufacturers, designers, and researchers involved in polymer science both in the academic and industrial sectors. In addition to original research articles related to the scope of the SI, review articles are also welcome.

Dr. Ali Fazli
Dr. Elnaz Esmizadeh
Guests Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polymer nanocomposites
  • polymer durability and service life assessment
  • polymer blends
  • polymer foams
  • thermoplastic elastomers
  • reinforcement
  • biodegradable polymers
  • polymer recycling
  • conductive polymers
  • self-healing polymers

Published Papers (3 papers)

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Research

14 pages, 622 KiB  
Article
Filler Models Revisited: Extension of the Nielson Model with Respect to the Geometric Arrangements of Fillers
by Johannes Macher, Pouyan Golestaneh, Astrid E. Macher, Matthias Morak and Andreas Hausberger
Polymers 2022, 14(16), 3327; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14163327 - 16 Aug 2022
Cited by 1 | Viewed by 1193
Abstract
Models describing how fillers affect the barrier properties of polymers remain an important research topic to improve applications such as hydrogen storage or food preservation. The Nielsen model, one of the earliest models for such predictions, is still one of the most widely [...] Read more.
Models describing how fillers affect the barrier properties of polymers remain an important research topic to improve applications such as hydrogen storage or food preservation. The Nielsen model, one of the earliest models for such predictions, is still one of the most widely used in the literature. However, it does not provide quantitative information on arrangements of fillers inside a polymer matrix, which is crucial for the definition of suitable filler distributions in barrier materials. Therefore, the channel model was developed in this work, which extends the Nielsen model by determining the relative distances between the fillers in regular filler arrangements in polymer matrices. This allows us to relate the permeation properties of filled polymer membranes to the geometric properties of the filler arrangement in simulations and experimental measurements. Simulations with geometries defined according to the channel model showed good agreement with the predictions of the Nielsen model. This demonstrated that the channel model can be a valuable tool for predicting at least mean geometric distances in studied polymer membranes. The validity range of the channel model was limited to a value range of the filler volume fraction 0.01≤ϕf≤0.5 based on theoretical considerations. Full article
(This article belongs to the Special Issue Effect of Fillers in Polymer Blends)
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17 pages, 7437 KiB  
Article
Recycled HDPE/Natural Fiber Composites Modified with Waste Tire Rubber: A Comparison between Injection and Compression Molding
by Ali Fazli, Tatjana Stevanovic and Denis Rodrigue
Polymers 2022, 14(15), 3197; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14153197 - 05 Aug 2022
Cited by 10 | Viewed by 2878
Abstract
With the objective of turning wastes into added-value materials, sustainable and fully recycled wood-plastic composites were reinforced by waste tire rubber particles to show balanced properties and potentially low-cost materials. Recycled high density polyethylene (rHDPE) was compounded (melt extrusion) with flax fiber (FF) [...] Read more.
With the objective of turning wastes into added-value materials, sustainable and fully recycled wood-plastic composites were reinforced by waste tire rubber particles to show balanced properties and potentially low-cost materials. Recycled high density polyethylene (rHDPE) was compounded (melt extrusion) with flax fiber (FF) and waste regenerated tire rubber (RR) to investigate the effect of mixing ratio, coupling agent (maleated polyethylene, MAPE) and molding process (injection and compression molding) on the properties of hybrid composites. In particular, a complete set of characterization was performed including thermal stability, phase morphology and mechanical properties in terms of tension, flexion and impact, as well as hardness and density. Adding 40 wt.% of flax fibers (FF) increased the tensile (17%) and flexural (15%) modulus of rHDPE, while the impact strength decreased by 58%. Substitution of FF by waste rubber particles improved by 75% the impact strength due to the elasticity and energy absorption of the rubber phase. The effects of impact modification were more pronounced for rHDPE/(FF/RR) compatibilized with MAPE (10 wt.%) due to highly improved interfacial adhesion and compatibility. The results also suggest that, for a fixed hybrid composition (FF/RR, 25/55 wt.%), the injection molded composites have a more homogenous morphology with a uniform distribution of well embedded reinforcements in the matrix. This better morphology produced higher tensile strain at break (12%) and impact strength (9%) compared to compression molded samples. Full article
(This article belongs to the Special Issue Effect of Fillers in Polymer Blends)
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14 pages, 6942 KiB  
Article
Fabrication of Highly Photostable Polystyrene Films Embedded with Organometallic Complexes
by Dina S. Ahmed, Alaa Mohammed, Amani A. Husain, Gamal A. El-Hiti, Mohammed Kadhom, Benson M. Kariuki and Emad Yousif
Polymers 2022, 14(5), 1024; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14051024 - 03 Mar 2022
Cited by 6 | Viewed by 1738
Abstract
Polystyrene is a common thermoplastic and is produced in different shapes and forms. The scale of manufacture of polystyrene has grown over the years because of its numerous applications and low cost of production. However, it is flammable, brittle, has low resistance to [...] Read more.
Polystyrene is a common thermoplastic and is produced in different shapes and forms. The scale of manufacture of polystyrene has grown over the years because of its numerous applications and low cost of production. However, it is flammable, brittle, has low resistance to chemicals, and is susceptible to photodegradation on exposure to ultraviolet radiation. There is therefore scope to improve the properties of polystyrene and to extend its useful lifetime. The current work reports the synthesis of organometallic complexes and investigates their use as photostabilizers for polystyrene. The reaction of excess ibuprofen sodium salt and appropriate metal chlorides in boiling methanol gave the corresponding complexes excellent yields. The organometallic complexes (0.5% by weight) were added to polystyrene and homogenous thin films were made. The polystyrene films blended with metal complexes were irradiated with ultraviolet light for extended periods of time and the stabilizing effects of the additives were assessed. The infrared spectroscopy, weight loss, depression in molecular weight, and surface morphology of the irradiated blends containing organometallic complexes were investigated. All the synthesized organometallic complexes acted as photostabilizers for polystyrene. The damage (e.g., formation of small polymeric fragments, decrease in weight and molecular weight, and irregularities in the surface) that took place in the polystyrene blends was much lower in comparison to the pure polystyrene film. The manganese-containing complex was very effective in stabilizing polystyrene and was superior to cobalt and nickel complexes. Full article
(This article belongs to the Special Issue Effect of Fillers in Polymer Blends)
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