Comparative Characterization of PP Nano‐ and Microcomposites by In‐Mold Shrinkage Measurements and Structural Characteristics

Revilla-Díaz, Rodolfo; Sánchez-Valdés, S.; López-Campos, Fernando; Medellín‐Rodríguez, F. J.; Lopez‐Quintanilla, M. L.

doi:10.1002/mame.200700019

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…Figure 1c is provided to illustrate the nonisothermal crystallization and melting curves of neat IMPP, neat coupling agents, IMPP/PP-g-MA blends and coupled xGnP 5 -filled IMPP composites at 2 and 4 wt% xGnP. It was reported that PP-g-MA acts as a nucleation agent that can increase crystallization parameters of PP homopolymer [29,30]. Clearly, the experimentally determined values of DH m , DH c , and X c of the two coupling agents are higher than neat IMPP and IMPP/PP-g-MA blends.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Rheological and thermal properties of exfoliated graphite nanoplatelets‐filled impact modified polypropylene nanocomposites

et al. 2017

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The objective of this research was to investigate the influence of exfoliated graphite nanoplatelets (xGnP) particle diameter, filler loading, and the addition of coupling agents on the rheological and thermal properties of xGnP‐filled impact modified polypropylene (IMPP) nanocomposites. xGnP‐filled IMPP composites were manufactured via melt mixing with and without the addition of polypropylene‐graft‐maleic anhydride (PP‐g‐MA). Particle diameter of xGnP had no significant effect on the melting (Tm) and crystallization (Tc) temperatures as well as degradation behavior of the composites. Storage modulus (E′) of the composites increased with increasing xGnP percent at high filler loadings and the incorporation of xGnP did not significantly affect the glass transition temperature, but filler loading does have a significant effect on the magnitude of the tan delta max peak values. The shear storage modulus (G′) of the composites with smaller diameter xGnP particles was lower than those of the composites with big diameter particle xGnP at lower frequencies. The higher the xGnP content of the composite, the higher the shear viscosity and the smaller particle diameter of xGnP results in lower viscosity values. Addition of a coupling agent decreased the melt viscosity of the xGnP‐filled nanocomposites and caused a slight reduction in the shear‐thinning behavior. POLYM. COMPOS., 39:E1512–E1519, 2018. © 2017 Society of Plastics Engineers

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Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Rheological and thermal properties of exfoliated graphite nanoplatelets‐filled impact modified polypropylene nanocomposites

et al. 2017

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“…Several studies on polymer/clay nanocomposites have reported similar results in the thermal properties. Incorporation of nanoclay resulted in a significant improvement on thermal stability of polystyrene, polyvinyl alcohol, PP–EP/EVA and PP …”

Section: Resultsmentioning

confidence: 99%

“…Incorporation of nanoclay resulted in a significant improvement on thermal stability of polystyrene, 31 polyvinyl alcohol, 32 PP-EP/EVA 33 and PP. 34 The increase of the thermal stability for PPR/clay and PPR/PβP/clay samples could be attributed to the clay particles that act as barrier to the diffusion of gases, originated by the thermal degradation process, from the bulk to the surface of the film, contributing to slow the degradation process of the PPR. 35 The increase of the thermal stability for PPR/PβP could be probably due to the double bond present in each unit of the PβP formula.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Development of Films of Novel Polypropylene based Nanomaterials for Food Packaging Application

Ayhan

Cimmino

Eştürk

et al. 2015

Packag. Technol. Sci.

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In order to design new antimicrobial nanocomposites with properties for food packaging application, films of polypropylene random copolymer (PPR), PPR/Poly‐β‐pinene (PβP), PPR/clay and PPR/PβP/clay were prepared by melt extrusion. Structural, morphological, mechanical, barrier, antimicrobial properties and thermal stability of the films were determined. PPR and PβP always form a homogeneous system in the amorphous phase; in the binary PPR/clay system, PPR molecules intercalate the clay galleries; in the ternary PPR/PβP/clay system, the miscibility between PPR and PβP prevents the intercalation of the PPR macromolecules into the clay galleries. The addition of clay and PβP increased the thermal stability and the tensile mechanical properties of PPR and reduced the oxygen transmission rate and the water vapor transmission rate compared with plain PPR. Films of nanomaterials containing PβP provided a reduction of the test microorganisms (Escherichia coli 25922) of 24% comparing to the control (PPR/clay film). Copyright © 2015 John Wiley & Sons, Ltd.

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“…As a kind of polar inorganic fillers, the glass fiber (GF) has the most obvious effect on decreasing the PP shrinkage among the inorganic fillers, which does not shrink and has the advantages of high elastic modulus, high strength, stable size, high thermal deformation temperature, good electrical properties, low price, etc . Rodolfo Revilla‐Díaz et al . studied the effect of nano‐clay, calcium carbonate, and GF on PP shrinkage.…”

Section: Introductionmentioning

confidence: 99%

Structures and properties of low‐shrinkage polypropylene composites

Kang

Chen

et al. 2016

J of Applied Polymer Sci

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The high shrinkage and the low impact strength severely limit the applications of the isotactic polypropylene (iPP). In this article, we studied the shrinkage, microstructure, and mechanical properties of the composites consisted of iPP, short glass fiber (GF), maleic anhydride grafted polypropylene (MPP), maleic anhydride grafted polypropylene/polyolefin elastomer (MPPPOE) or composite toughening agents (CTAs). The results show that the shrinkage of the composite with 40% GF reduces to 0.0754% (24 h) and 0.0893(48 h), respectively, under room temperature, which is far lower than the shrinkage [1.782% (24 h) and 1.821% (48 h)] of the pure iPP. For the composite of PP/GF/MPPPOE/CTAs (55/30/5/10), the tensile strength increases to 65.53 MPa (33.8 MPa for pure iPP), the tensile modulus is 1445 MPa which is 136% higher than pure iPP, and the izod impact strength reaches 22.72 kJ/m 2 (only 5.28 kJ/m 2 for pure iPP). Not only the scale stability of iPP is remarkably improved, but also the comprehensive mechanical properties are enhanced drastically. This work may generate potential opportunities for iPP in those applications demanding high scale stability.

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Comparative Characterization of PP Nano‐ and Microcomposites by In‐Mold Shrinkage Measurements and Structural Characteristics

Cited by 15 publications

References 13 publications

Rheological and thermal properties of exfoliated graphite nanoplatelets‐filled impact modified polypropylene nanocomposites

Rheological and thermal properties of exfoliated graphite nanoplatelets‐filled impact modified polypropylene nanocomposites

Development of Films of Novel Polypropylene based Nanomaterials for Food Packaging Application

Structures and properties of low‐shrinkage polypropylene composites

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