Borovanska, I.; Krastev, R.; Benavente, R.; Monleón Pradas, M.; Vallés Lluch, A.; Samichov, V.; Iliev, M. (2014). Ageing effect on morphology, thermal and mechanical properties of impact modified LDPE/PP blends from virgin and recycled materials. Journal of Elastomers and Plastics. 46(5):427-447. doi:10.1177/0095244312469959
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/51529
Title:
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Ageing effect on morphology, thermal and mechanical properties of impact modified LDPE/PP blends from virgin and recycled materials
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Author:
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Borovanska, Irena
Krastev, Rumen
Benavente, Rosario
Monleón Pradas, Manuel
Vallés Lluch, Ana
Samichov, Vasil
Iliev, Mario
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UPV Unit:
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Universitat Politècnica de València. Centro de Biomateriales e Ingeniería Tisular - Centre de Biomaterials i Enginyeria Tissular
Universitat Politècnica de València. Departamento de Termodinámica Aplicada - Departament de Termodinàmica Aplicada
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Issued date:
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Abstract:
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An experimental study was conducted to investigate the influence of ageing on the
morphological, thermal and mechanical properties of virgin and two types of recycled
(from technological and postconsumer wastes) modified ...[+]
An experimental study was conducted to investigate the influence of ageing on the
morphological, thermal and mechanical properties of virgin and two types of recycled
(from technological and postconsumer wastes) modified polyolefin blends.
Immiscible blends of virgin low-density polyethylene (LDPE) and polypropylene (PP)
in weight ratio 1:1 were modified with the ethylene–propylene diene monomer
(EPDM) rubber impact modifier. The efficiency of modification was investigated as
a function of modifier content in the range from 7 to 15 wt%. The blends were
prepared by extrusion using a corotating twin screw extruder Brabender DSE35/
17D at melt temperature in the range from 150 to 200C and a screw speed of
20 rpm. Compression-molded samples were subjected to natural and accelerated
ageing and characterized by differential scanning calorimetry (DSC), scanning electron
microscopy (SEM) and mechanical testing.
The experiments show that the ageing processdeteriorates the mechanical properties of
the PP/LDPE blends, and this is more clearly expressed in the blends of virgin material. The
results show that the presence of the EPDM modifier delays the process of ageing in PP/
LDPE blends. The DSC and SEM investigations confirm the structural changes in the
examined compositions.
[-]
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Subjects:
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Polyolefin blends
,
Ageing
,
Modification
,
Thermal properties
,
Mechanics
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Copyrigths:
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Cerrado |
Source:
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Journal of Elastomers and Plastics. (issn:
0095-2443
) (eissn:
1530-8006
)
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DOI:
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10.1177/0095244312469959
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Publisher:
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SAGE Publications (UK and US)
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Publisher version:
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http://dx.doi.org/10.1177/0095244312469959
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Project ID:
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COST Action FA0904
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Thanks:
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This work was financially supported by the Bulgarian Ministry of Education and Science Contract No. BG051PO001/07/3.3-02/51 and Project No. DTK 02/7-2010.
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Type:
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Artículo
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