Recycled HDPE/Natural Fiber Composites Modified with Waste Tire Rubber: A Comparison between Injection and Compression Molding.
coupling agent
flax fibers
hybrid composites
molding conditions
recycled HDPE
waste tire rubber
Journal
Polymers
ISSN: 2073-4360
Titre abrégé: Polymers (Basel)
Pays: Switzerland
ID NLM: 101545357
Informations de publication
Date de publication:
05 Aug 2022
05 Aug 2022
Historique:
received:
01
07
2022
revised:
23
07
2022
accepted:
25
07
2022
entrez:
12
8
2022
pubmed:
13
8
2022
medline:
13
8
2022
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 35956711
pii: polym14153197
doi: 10.3390/polym14153197
pmc: PMC9370949
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : Natural Sciences and Engineering Research Council
ID : NA
Organisme : Research Center on Advanced Materials (CERMA)
ID : NA
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