Control of molecular weight and polydispersity in polyethylene/needle-like shaped clay nanocomposites obtained by in situ polymerization with metallocene catalysts

Herrero, Manuel; Núñez, Karina; Gallego, R.; Merino, Juan Carlos; Pastor, J. M.

doi:10.1016/j.eurpolymj.2015.12.005

Cited by 23 publications

(16 citation statements)

References 50 publications

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“…The in-situ polymerization method delivered well-dispersed clay fillers in a polymer matrix, which imparted an outstanding antibacterial property to the biodegradable composite material as well as an enhanced storage modulus. Herrero et al [105] investigated the influence of the shape and area of the nanoclays used in the in-situ polymerization method. Their study demonstrated that needlelike clay promotes higher molar mass and better mechanical properties compared to laminar clay; they improved the in-situ polymerization process by using a non-isothermal temperature profile and an additional amount of co-catalyst.…”

Section: In-situ Polymerization Methodsmentioning

confidence: 99%

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

et al. 2018

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Recent advancements in material technologies have promoted the development of various preparation strategies and applications of novel polymer–nanoclay composites. Innovative synthesis pathways have resulted in novel polymer–nanoclay composites with improved properties, which have been successfully incorporated in diverse fields such as aerospace, automobile, construction, petroleum, biomedical and wastewater treatment. These composites are recognized as promising advanced materials due to their superior properties, such as enhanced density, strength, relatively large surface areas, high elastic modulus, flame retardancy, and thermomechanical/optoelectronic/magnetic properties. The primary focus of this review is to deliver an up-to-date overview of polymer–nanoclay composites along with their synthesis routes and applications. The discussion highlights potential future directions for this emerging field of research.

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Section: In-situ Polymerization Methodsmentioning

confidence: 99%

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

et al. 2018

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“…The main uses of the polyolefins are limited to commodity applications such as manufacturing pipes, industrial parts, packaging, etc and their demand in applications for high performance is very low due to their properties are not enough in these areas. To widen the usefulness of polyolefins, nanocomposites are synthesized to improve the properties of the neat polymers [1].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the relative environmental impact and low cost, the nanoclays are used to form nanocomposites consisting of an organic polymer matrix dispersed with inorganic filler. Nanoclays are nanoparticles of layered mineral silicates with layered structural units that can form complex clay crystallites by stacking these layers [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Control of branches distribution in linear PE copolymers using fibrillar nanoclay as support of catalyst system

Tanasi

Asensio

Herrero

et al. 2020

Polymer

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This study focuses on evaluating the consequences of using of sepiolite as a filler and co-catalyst support in the polymerization of polyethylene copolymers and their nanocomposites. The method used, in situ polymerization, has many variables to study because the type and distribution of the branches have an important effect on the final properties of the material.In an effort to understand the influence of these variables, different polyethylene copolymers (hexene, octene, decene), with its respective nanocomposites, were prepared and characterized. Preliminary results have demonstrated the use of sepiolite allows obtaining nanocomposites with narrower molecular weights and a more homogeneous distribution of the branches than the corresponding neat copolymers.

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“…In the last two decades, different inorganic nanoparticles have been used to improve the stiffness of polyamide matrix: nanoclays [22,23], carbon nanotubes [24,25], layered double hydroxides [26], and graphene and graphene oxide [27][28][29][30]. From all possibilities, needle-like shape nanoclays, as sepiolite, have attracted interest due to their low cost, abundance and great performance [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Morphological, Thermal, and Mechanical Behavior of Polyamide11/Sepiolite Bio‐Nanocomposites Prepared by Melt Compounding and In Situ Polymerization

et al. 2018

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The use of bio‐based plastics as polymeric matrices to produce technical composites has become an important topic in material science. In this sense, bio‐based polyamides represent an interesting alternative to their petroleum‐based counterparts because of their good thermal and mechanical properties, their low specific weight, and their ability to be used in complex parts by injection molding. In the present study, bio‐based polyamide 11/sepiolite nanocomposites were prepared using the two most feasible techniques from the industrial point of view: melt compounding and in situ polymerization. The effect of the preparation approach and the amount of nanoclay were evaluated to check their influence on thermal, morphological, and mechanical behavior of the final nanocomposites. Regardless of the preparation approach, all nanocomposites showed improvements in thermo‐mechanical properties with increasing contents of sepiolite. However, the nanocomposites obtained by in situ polymerization presented higher values of Young's modulus, tensile strength, and heat distortion temperature due to a greater dispersion of the nanoclay in the final composites. For in situ polymerization, the dispersion of sepiolite nanoparticles is carried out when polymer chains are growing and the viscosity of the system is low. POLYM. COMPOS., 40:E704–E713, 2019. © 2018 Society of Plastics Engineers

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Control of molecular weight and polydispersity in polyethylene/needle-like shaped clay nanocomposites obtained by in situ polymerization with metallocene catalysts

Cited by 23 publications

References 50 publications

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

Control of branches distribution in linear PE copolymers using fibrillar nanoclay as support of catalyst system

Morphological, Thermal, and Mechanical Behavior of Polyamide11/Sepiolite Bio‐Nanocomposites Prepared by Melt Compounding and In Situ Polymerization

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