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Article
Publication date: 9 May 2020

Effect of alkali treatment on adhesion of thermoplastic polyurethane elastomer/polyester inter-ply hybrid composites

Pu Tian, Ruosi Yan, Yabiao Tong, Lixia Jia and Jiming Yao

The purpose of this paper is to investigate the effects of alkali treatment on adhesion of industrial thermoplastic polyurethane elastomer (TPU)/polyester woven fabric…

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Abstract

Purpose

The purpose of this paper is to investigate the effects of alkali treatment on adhesion of industrial thermoplastic polyurethane elastomer (TPU)/polyester woven fabric inter-ply hybrid composites.

Design/methodology/approach

Inter-ply hybrid composites were exposed to varying concentration of sodium hydroxide at different temperature and time and their mechanical properties including differential scanning calorimetry, scanning electron microscope, tensile and peeling strength evaluated to determine optimal treatment parameters.

Findings

Modified polyester fabrics treated with alkali had higher tensile and peeling strengths. Accordingly, alkali treatment roughened the surface of polyester fabric, decreasing warp and weft densities, thus increasing fiber surface energy. The fabric had the highest peeling strength of 3.23 N/mm at treatment of 25% concentration of sodium hydroxide (NaOH). Short-term exposure to ultraviolet had little effect on interfacial adhesion of alkali-treated conveyor belt.

Research limitations/implications

Polyester fabric, applied in reinforcing industrial conveyor belts, is never degreased, roughened, sensitized or activated. In this paper, one-step treatment of polyester fabric was performed to increase its adhesion with polyester inter-ply hybrid composites, providing a reference for practical industrial application.

Practical implications

The method developed in this research is simple and provides a solution to improving the interfacial adhesion of TPU/polyester conveyor belt.

Originality/value

The novel alkali treatment technology has many applications in the interfacial performance of composite materials.

Details

Pigment & Resin Technology, vol. 49 no. 5
Type: Research Article
DOI: https://doi.org/10.1108/PRT-02-2020-0007
ISSN: 0369-9420

Keywords

  • Thermoplastic polyurethane elastomer (TPU)
  • Alkali treatment
  • Polyester fabric
  • Peeling strength

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Article
Publication date: 26 September 2008

Fused deposition modelling of an auricle framework for microtia reconstruction based on CT images

Wen Zeng, Feng Lin, Tingchun Shi, Renji Zhang, Yongyan Nian, Jie Ruan and Tianrui Zhou

In plastic reconstruction surgeries, total auricular reconstruction for microtia is a real challenge. Presently, autogenous costal cartilage and MEDPOR are the chosen…

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Abstract

Purpose

In plastic reconstruction surgeries, total auricular reconstruction for microtia is a real challenge. Presently, autogenous costal cartilage and MEDPOR are the chosen materials but none can satisfy the requirements of orthopaedic operation. The purpose of this paper is to examine how to fabricate an ear scaffold with a good shape.

Design/methodology/approach

A new approach to form the auricle framework is described. CT scan data of the patient's contralateral “good ear” are used to generate a 3D reconstruction model of the new ear. This model is then imported into rapid prototyping (RP) software to slice. The sliced data drive the fused deposition modeling (FDM) machine to build the ear framework layer by layer. Based on the actual shape of the computer model, FDM technology produces a real feel ear framework to match the size of the opposite good ear.

Findings

An artificial human ear was built using FDM technology based on CT images. The auricular framework with polyurethane was a porous structure with good flexibility and biocompatibility. After implanting into the mouse, a real life human ear appeared on the back of the mouse. The experiment indicated that this method provided an efficient way to macrotia reconstruction.

Originality/value

The freeform fabrication technique combined with CT image reconstruction could provide an efficient way to produce a porous structure and solve the framework carving problem in microtia reconstruction.

Details

Rapid Prototyping Journal, vol. 14 no. 5
Type: Research Article
DOI: https://doi.org/10.1108/13552540810907947
ISSN: 1355-2546

Keywords

  • Plastic surgery
  • Image scanners
  • Modelling
  • Ears
  • Thermoplastic polymers

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Article
Publication date: 1 June 2002

Recent developments in materials for use in protective clothing

Roshan Shishoo

This paper outlines the innovations in high functional and high performance fibres for applications in protective clothing, including fibres for flame and heat protection…

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Abstract

This paper outlines the innovations in high functional and high performance fibres for applications in protective clothing, including fibres for flame and heat protection. It also describes some typical woven and non‐woven constructions for such applications. And presents the trends in producing smart textile materials, capable of interacting with human/environmental conditions.

Details

International Journal of Clothing Science and Technology, vol. 14 no. 3/4
Type: Research Article
DOI: https://doi.org/10.1108/09556220210437167
ISSN: 0955-6222

Keywords

  • Protective clothing
  • Fabrics

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Article
Publication date: 1 December 2004

Bayer Polymers LLC begins operations under new Bayer MaterialScience LLC name

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Abstract

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Anti-Corrosion Methods and Materials, vol. 51 no. 6
Type: Research Article
DOI: https://doi.org/10.1108/acmm.2004.12851fab.014
ISSN: 0003-5599

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Article
Publication date: 5 July 2011

New technology solutions for the rail industry from BASF

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Pigment & Resin Technology, vol. 40 no. 4
Type: Research Article
DOI: https://doi.org/10.1108/prt.2011.12940daa.006
ISSN: 0369-9420

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Article
Publication date: 1 August 2000

Polyester resins range developments

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Pigment & Resin Technology, vol. 29 no. 4
Type: Research Article
DOI: https://doi.org/10.1108/prt.2000.12929dad.014
ISSN: 0369-9420

Keywords

  • Baxenden Chemicals
  • Resins

Content available
Article
Publication date: 1 January 2006

Huntsman Polyurethanes introduces extended portfolio of thermoplastic polyurethanes adhesives

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Abstract

Details

Anti-Corrosion Methods and Materials, vol. 53 no. 1
Type: Research Article
DOI: https://doi.org/10.1108/acmm.2006.12853aad.010
ISSN: 0003-5599

Keywords

  • Polyurethane,Adhesives

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Article
Publication date: 2 January 2018

Tunable shape recovery progress of thermoplastic polyurethane by solvents

Changchun Wang, Bo Kou, Zusheng Hang, Xuejuan Zhao, Tianxuan Lu, Ziqi Wu and Jin-Peng Zhang

This study aims to present that the chemo-responsive shape recovery of thermoplastic polyurethane (TPU) is tunable by solvents with different solubility parameters, and it…

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Abstract

Purpose

This study aims to present that the chemo-responsive shape recovery of thermoplastic polyurethane (TPU) is tunable by solvents with different solubility parameters, and it is generic for chemo-responsive shape-memory polymer and its composites.

Design/methodology/approach

Two kinds of commercial TPU samples with different thicknesses were prepared by panel vulcanizer and injection molding (an industrial manner) to investigate their chemo-responsive shape memory properties in acetic ether and acetone.

Findings

Results showed that all of TPU films with different thicknesses can fully recover their original shapes weather they recover in acetic ether or acetone. But the recovery time of TPU films in acetone is greatly reduced, especially for the twisting samples. The residual strains of recovery TPU samples after extension reduce obviously.

Research limitations/implications

The great decrement of recovery time is related to two factors. One is due to the bigger solubility parameter of acetone with higher dipole moment compared with those of acetic ether, and the other is the remained internal stress of TPU films after preparation. The internal stress is identified to have an effect on the shape-memory properties by comparing the recovery process of samples with/without annealing. The reduced residual strains of recovery TPU samples after extension is due to the increasing mobility of polymer segments after molecules of acetic ether penetrates into the polymeric chains.

Originality/value

This is a universal strategy to control the recovery process of shape-memory materials or composites. The underlying mechanism is generic and should be applicable to chemo-responsive shape-memory polymers or their composites.

Details

Pigment & Resin Technology, vol. 47 no. 1
Type: Research Article
DOI: https://doi.org/10.1108/PRT-03-2017-0021
ISSN: 0369-9420

Keywords

  • Polyurethanes
  • Solvents
  • Internal stress
  • Shape memory effect

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Article
Publication date: 13 November 2019

The development of a conical screw-based extrusion deposition system and its application in fused deposition modeling with thermoplastic polyurethane

Jie Leng, Junjie Wu, Ning Chen, Xiang Xu and Jie Zhang

This paper aims to develop an integrated and portable desktop 3D printer using direct extruding technology to expand applied material field. Different from conventional…

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Abstract

Purpose

This paper aims to develop an integrated and portable desktop 3D printer using direct extruding technology to expand applied material field. Different from conventional fused deposition modeling (FDM) which uses polymer filaments as feedstock, the developed system can fabricate products directly using polymer pellets. And its printing properties are also investigated.

Design/methodology/approach

A conical screw-based extrusion deposition (CSBED) system was developed with a large taper conical screw to plasticize and extrude fed materials. The 3D printer was developed with assistance of precision positioning and controlling system. Biocompatible thermoplastic polyurethane (TPU) pellets were selected as raw materials for experiments. The influences of four processing parameters: nozzle temperature, fill vector orientation, layer thickness and infill density on the product’s internal structure and tensile properties were investigated.

Findings

It is concluded that the customized system has a high manufacturing accuracy with a diminutive global size and is suitable for printing soft materials such as TPU. Theoretical calculation shows the developed conical screw is more effective in plasticizing and extruding compared with conventional screw. Printed samples can achieve applicable tensile properties under harmonious parameter cooperation. Deposited materials are found to have voids among adjacent roads under unbefitting parameters.

Originality/value

The developed system efficiently improves material limitations compared to commercial FDM systems and exhibits great potential in medical field because soft materials such as biocompatible TPU pellets can be directly used.

Details

Rapid Prototyping Journal, vol. 26 no. 2
Type: Research Article
DOI: https://doi.org/10.1108/RPJ-05-2019-0139
ISSN: 1355-2546

Keywords

  • Morphology
  • Fused deposition modeling
  • Extrusion
  • Conical screw
  • Thermoplastic polyurethane

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Article
Publication date: 19 March 2018

Effect of pre-strain and KMnO4 oxidation of carbon nanotubes embedded in polyurethane on strain dependent electrical resistance of the composite

Petr Slobodian, Pavel Riha, Robert Olejnik and Jiri Matyas

The synergistic effect of functionalization of multi-walled carbon nanotubes (CNT) using KMnO4 oxidation and initial tensile deformation on the electrical resistance of…

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Abstract

Purpose

The synergistic effect of functionalization of multi-walled carbon nanotubes (CNT) using KMnO4 oxidation and initial tensile deformation on the electrical resistance of nanotube network/polyurethane composite subjected to elongation was studied.

Design/methodology/approach

Though the initial deformation irreversibly changed the arrangement of carbon nanotube network, subsequent cyclic elongation confirmed stable resistance values. The increased strain-dependent resistance of stimulated nanotube network/polyurethane composite was demonstrated by monitoring vibration of tambour leather after a bead impact and finger flexion.

Findings

The results showed a tenfold composite resistance increase for the composite prepared from KMnO4 oxidized nanotubes, quantified by a so-called gauge factor, from a value of about 20 in comparison to the network prepared from pristine nanotubes. This is a substantial increase, which ranks the stimulated composite among materials with the highest electromechanical response.

Originality/value

The results in this paper are new and have not been published yet. The paper combines different ideas which are developed together. It presents a new concept of synergistic effect of CNT oxidation and application of pre-strain simulation. Oxidation and pre-strain increases by several times the sensitivity of the tested composites which are predetermined for use as strain sensors of various sizes and shapes.

Details

Sensor Review, vol. 38 no. 2
Type: Research Article
DOI: https://doi.org/10.1108/SR-05-2017-0079
ISSN: 0260-2288

Keywords

  • Nanotechnology
  • Sensors
  • Polymer sensors
  • Carbon nanotubes
  • Polyurethane composite
  • Transverse cracking

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