Self-Reinforcement via 1D Nanostructure Formation during Melt Blending of Thermoplastics and Thermoplastic Elastomers with Nanophase-Separated UHMWPE/HDPE Wax Reactor Blends

2021 ◽  
Author(s):  
Timo Hees ◽  
Carl G. Schirmeister ◽  
Patrizia Pfohl ◽  
Daniel Hofmann ◽  
Rolf Muelhaupt
Keyword(s):  
Thermoplastic Elastomers ◽  
Melt Blending ◽  
Nanostructure Formation ◽  
1D Nanostructure

scholarly journals Rotomolding of Thermoplastic Elastomers Based on Low-Density Polyethylene and Recycled Natural Rubber

2019 ◽  
Vol 9 (24) ◽  
pp. 5430 ◽  
Author(s):  
Ramin Shaker ◽  
Denis Rodrigue
Keyword(s):  
Thermoplastic Elastomers ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Material Degradation ◽  
Rubber Content ◽  
Ground Tire Rubber ◽  
The Road ◽  
Processing Cost ◽  
Physical Density

In this study, regenerated and nonregenerated off-the-road (OTR) ground tire rubber (GTR) was blended with low-density polyethylene (LDPE) to produce thermoplastic elastomers (TPE) by rotational molding. In particular, blending was performed by two different methods: melt blending (extrusion) and dry blending (high shear mixer). Then, different GTR concentrations (0, 20, 35, and 50 wt %) were used to determine the effect of rubber content on the processability and properties of the rotomolded compounds. From the samples produced, a complete morphological (optical and scanning electron microscopy), physical (density and hardness), and mechanical (tension, flexion, and impact) characterization was performed. The results showed that increasing the rubber content decreased the mechanical rigidity and strength but increased the elasticity and ductility. Finally, although melt blending led to slightly better properties than dry blending, the latter is more interesting to limit possible material degradation (mechanical, thermal, and oxidative), while reducing processing cost and time.

Melt-Processable Nacre-Mimetic Hydrocarbon Composites via Polymer 1D Nanostructure Formation

2019 ◽  
Vol 52 (23) ◽  
pp. 9272-9279
Author(s):  
Fan Zhong ◽  
Ralf Thomann ◽  
Yi Thomann ◽  
Laura Burk ◽  
Rolf Mülhaupt
Keyword(s):  
Nanostructure Formation ◽  
1D Nanostructure

Digitally Tuned Multidirectional All-Polyethylene Composites via Controlled 1D Nanostructure Formation during Extrusion-Based 3D Printing

2021 ◽  
Author(s):  
Carl G. Schirmeister ◽  
Timo Hees ◽  
Oleksandr Dolynchuk ◽  
Erik H. Licht ◽  
Thomas Thurn-Albrecht ◽  
...  
Keyword(s):  
3D Printing ◽  
Nanostructure Formation ◽  
1D Nanostructure ◽  
Polyethylene Composites

Compatibilization of Ionomeric Polyblends by Intermolecular Ionic Interactions

1999 ◽  
Vol 72 (2) ◽  
pp. 449-463 ◽  
Author(s):  
Prince Antony ◽  
S. K. De
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Thermal Analyses ◽  
Thermoplastic Elastomers ◽  
Zinc Salt ◽  
Ionic Interactions ◽  
Melt Blending ◽  
Temperature Transition ◽  
Ionic Clusters ◽  
Poly Ethylene

Abstract Ionomeric polyblends based on the zinc salt of carboxylated nitrile rubber, abbreviated as Zn-XNBR, and the zinc salt of poly(ethylene-co-methacrylic acid), abbreviated as Zn-EMA, were prepared by melt blending technique. Zn-XNBR/Zn-EMA ionomeric polyblends, in the compositions ranging from 90/10 to 50/50, parts by weight, behave as ionic thermoplastic elastomers, and show synergism in physical properties. The synergism in physical properties is attributed to the formation of a technologically compatible polyblend, wherein intermolecular ionic interactions between the neat ionomers take part in the compatibilization mechanism. Dynamic mechanical thermal analyses show a high temperature transition, owing to the presence of ionic clusters in the neat ionomers and the ionomeric polyblends. The ionomeric polyblend exhibits higher physical properties and melt viscosity than the corresponding non-ionomeric polyblend.

Wear resistant all-PE single-component composites via 1D nanostructure formation during melt processing

Polymer ◽  
2018 ◽  
Vol 151 ◽  
pp. 47-55 ◽  
Author(s):  
Timo Hees ◽  
Fan Zhong ◽  
Christof Koplin ◽  
Raimund Jaeger ◽  
Rolf Mülhaupt
Keyword(s):  
Melt Processing ◽  
Single Component ◽  
Wear Resistant ◽  
Nanostructure Formation ◽  
1D Nanostructure

Wrinkling Poly(trimethylene 2,5-Furanoate) Free-standing Films: Nanostructure Formation and Physical Properties

2020 ◽  
Author(s):  
Michelina Soccio ◽  
Nadia Lotti ◽  
Andrea Munari ◽  
Esther Rebollar ◽  
Daniel E Martínez-Tong
Keyword(s):  
Irradiation Time ◽  
Polymer Surface ◽  
Laser Source ◽  
Free Standing ◽  
Force Microscopy ◽  
Nanostructure Formation ◽  
Physicochemical Changes ◽  
Angle Measurements ◽  
Atomic Force ◽  
Contact Angle Measurements

<p>Nanostructured wrinkles were developed on fully bio-based poly(trimethylene furanoate) (PTF) films by using the technique of Laser Induced Periodic Surface Structures (LIPSS). We investigated the effect of irradiation time on wrinkle formation using an UV pulsed laser source, at a fluence of 8 mJ/cm2. It was found that the pulse range between 600 and 4800 pulses allowed formation of periodic nanometric ripples. The nanostructured surface was studied using a combined macro- and nanoscale approach. We evaluated possible physicochemical changes taking place on the polymer surface after irradiation by infrared spectroscopy, contact angle measurements and atomic force microscopy. The macroscopic physicochemical properties of PTF showed almost no changes after nanostructure formation, differently from the results previously found for the terephthalic counterparts, as poly(ethyleneterephthalate), PET, and poly(trimethyleneterephthalate), PTT. The surface mechanical properties of the nanostructured PTF were found to be improved, as evidenced by nanomechanical force spectroscopy measurements. In particular, an increased Young’s modulus and higher stiffness for the nanostructured sample were measured. <br></p>

Thermoplastic Elastomers

2000 ◽  
Author(s):  
Sabet Abdou-Sabet ◽  
Hans-Georg Wussow ◽  
Larry M. Ryan ◽  
Lawrence Plummer ◽  
Didier Judas ◽  
...  
Keyword(s):  
Thermoplastic Elastomers

scholarly journals Optical, Structural, and Dielectric Properties of Composites Based on Thermoplastic Polymers of the Polyolefin and Polyurethane Type and BaTiO3 Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 753
Author(s):  
M. Baibarac ◽  
A. Nila ◽  
I. Smaranda ◽  
M. Stroe ◽  
L. Stingescu ◽  
...  
Keyword(s):  
Crystallization Process ◽  
Weight Ratio ◽  
Thermoplastic Elastomers ◽  
Visible Spectral Range ◽  
X Ray Diffraction ◽  
Thermoplastic Polymers ◽  
The Matrix ◽  
Free Films ◽  
Batio3 Nanoparticles ◽  
Properties Of Composites

In this work, new films containing composite materials based on blends of thermoplastic polymers of the polyurethane (TPU) and polyolefin (TPO) type, in the absence and presence of BaTiO3 nanoparticles (NPs) with the size smaller 100 nm, were prepared. The vibrational properties of the free films depending on the weight ratio of the two thermoplastic polymers were studied. Our results demonstrate that these films are optically active, with strong, broad, and adjustable photoluminescence by varying the amount of TPU. The crystalline structure of BaTiO3 and the influence of thermoplastic polymers on the crystallization process of these inorganic NPs were determined by X-ray diffraction (XRD) studies. The vibrational changes induced in the thermoplastic polymer’s matrix of the BaTiO3 NPs were showcased by Raman scattering and FTIR spectroscopy. The incorporation of BaTiO3 NPs in the matrix of thermoplastic elastomers revealed the shift dependence of the photoluminescence (PL) band depending on the BaTiO3 NP concentration, which was capable of covering a wide visible spectral range. The dependencies of the dielectric relaxation phenomena with the weight of BaTiO3 NPs in thermoplastic polymers blends were also demonstrated.

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