Recycled Polyolefin Blends: Effect of Modified Natural Zeolite on their Properties and Morphology

Borovanska, Irena; Cerrada, María L.; Zipper, Peter; Djoumaliisky, Strashimir

doi:10.1080/03602559.2015.1070865

Cited by 14 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Natural zeolites were found to have moderate cracking ability with higher selectivity towards the liquid fraction, but its efficiency was strongly correlated to the plastic/catalyst ratio. 412,[450][451][452][453][454][455][456][457][458][459][460] Given the uncontrolled structure of natural zeolites, the materials contain impurities and there is little consistency amongst the materials. As such, there is high variability in the effectiveness of natural zeolites.…”

Section: Catalystsmentioning

confidence: 99%

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

View full text Add to dashboard Cite

Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundamentals of these technologies to design improved systems for chemical recycling and upcycling of waste plastics. In this paper, we review the entire life cycle of plastics and options for the management of plastic waste to address barriers to industrial chemical recycling and further provide perceptions on possible opportunities with such materials. Knowledge and insights to enhance plastic recycling beyond its current scale are provided. Outstanding research problems and where researchers in the field should focus their efforts in the future are also discussed.

show abstract

Section: Catalystsmentioning

confidence: 99%

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The incorporation of the carbon nanotube, zeolite, LDPE, PP, natural fillers, and fibers with treatment into the waste polymer for reuse has resulted to an improvement of the composite strength and enhancement of compatibility of blended components of composites as presented in Table 3. The improvement has been reported to be a function of compatibilizer types, size and particle shape, branching, and dimensions of polymeric chains as reported by [37]. In the case of natural fibers or fillers, it seems fibers or fillers containing compatibilizer which may or may not have been identified.…”

Section: Modifications and Properties Of Recycling Of Virgin And Wastmentioning

confidence: 76%

“…Chemical recycling (pyrolysis) had been a major technology for waste or postconsumer LDPE to save the environment, but not cost-effective; emissions of some constituents and required additives or modifiers (catalysts) for considerable yields of the products in many applications [24,30]. Incorporation of natural zeolite, clinoptilolite ((K 2 ,Na 2 ,Ca)Al 6 Si 3 0 72 ), improved the strength of the filled composites, rheological behavior, thermal, compatibility of the individual polymeric components, morphology, and texture of the moldings from recycled polyolefins which strongly depends on the type of zeolite, size and shape, branching, dimensions, and types of polymeric chains [37].…”

Section: Modifications and Properties Of Recycling Of Virgin And Wastmentioning

confidence: 99%

Thermoplastic Recycling: Properties, Modifications, and Applications

Azeez¹

2020

Thermosoftening Plastics

View full text Add to dashboard Cite

The increasing rate of plastic waste generation coupled with undesirable disposal, especially in the urban areas, has resulted to environmental threat in the globe which has been attributed to legislation, poor biodegradability, economic growth, rural to urban migration, increase in consumption, and standard or cost of living. This chapter will focus on overview, properties of virgin and recycled thermoplastics, recycling techniques, and applications of different types of thermoplastic articles such as HDPE, LDPE, PVC, PET, and polypropylene (PP) with improved properties based on modifications using eco-friendly materials for sustainable applications in order to save human existence from the menace of environmental and economic issues.

show abstract

“…[99] Natural zeolites in the protonated form have been used for PP, HDPE, LDPE, PS, PP/HDPE, EVA, and PET degradations and have shown moderate cracking ability and improved yields of liquid product, while also increasing char production. [98,99,107,111,112,[182][183][184][185][186][187][188][189][190][191][192][193][194] However, catalyst efficiency has been strongly correlated to p/c ratio. [191,192] For example, when catalyzing polystyrene at a high p/c ratio at 450°C, natural zeolite has been found to decrease liquid and gas production as compared to thermal degradation while significantly increasing char concentration.…”

Section: Natural Zeolitesmentioning

confidence: 99%

“…Naturally occurring silica‐rich zeolites, such as clinoptilolite and mordenite, are studied as potential catalyst materials because they are readily available and inexpensive [99] . Natural zeolites in the protonated form have been used for PP, HDPE, LDPE, PS, PP/HDPE, EVA, and PET degradations and have shown moderate cracking ability and improved yields of liquid product, while also increasing char production [98,99,107,111,112,182–194] . However, catalyst efficiency has been strongly correlated to p/c ratio [191,192] .…”

Section: Heterogeneous Catalystsmentioning

confidence: 99%

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

2020

View full text Add to dashboard Cite

, respectively. Her graduate research focused on the fundamental understanding of deoxygenation mechanisms for biomass probe molecules on single crystals and thin films. During her graduate career, she received the DOE Science Graduate Student Research (SCGSR) award (2019) and conducted surface science research at Brookhaven National Lab. She now is a postdoctoral researcher at the University of Wisconsin-Madison. Her research focuses on surface spectroscopy and controlled design of heterogeneous catalysts. Melissa C. Cendejas received her B.A. (2016) in Chemistry and English from Williams College. There, she worked on the synthesis of conjugated organic molecules and phosphorusbased surfactants. She then started her PhD in Chemistry at the University of Wisconsin-Madison under the supervision of Prof. Ive Hermans. She studies active site formation on boron-based catalysts. She received the DOE Office of Science Graduate Student Research (SCGSR) award (2020) to perfrom in situ x-ray spectroscopy of catalysts at Stanford Synchrotron Radiation Lightsourse. Prof. Dr. Ive Hermans obtained his Ph.D. from KU Leuven University in Belgium in 2006. In addition to his scientific education, he also holds a postgraduate degree in Business Administration (KU Leuven, 2006). After postdoctoral research on in situ spectroscopy and reaction engineering with Prof. Alfons Baiker, he became assistant professor for heterogeneous catalysis (spring 2008) at ETH Zurich in Switzerland. January 2014, Prof. Hermans moved to the University of Wisconsin-Madison, holding a dual appointment in the Department of Chemistry and the Department of Chemical and Biological Engineering. His group focuses on the mechanistic understanding of catalytic technology using a variety of techniques.

show abstract

Recycled Polyolefin Blends: Effect of Modified Natural Zeolite on their Properties and Morphology

Cited by 14 publications

References 25 publications

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Thermoplastic Recycling: Properties, Modifications, and Applications

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

Contact Info

Product

Resources

About