Publications

The AMCASH project has yielded a number of scientific journal publications to date. These peer-reviewed and accepted publications are detailed below, with links to access the paper from relevant publishers.

 

Re-formative polymer composites from plastic waste: novel infrastructural product application

Abstract:

A novel re-formative polymer composite manufacturing route has been developed by UK and Qatar-based Universities. This novel process recycles domestic-waste thermoplastic material, without the requirement for intensive filtering or washing operations. The produced polymer can be reinforced with recycled glass fibres, forming a structurally load-bearing composite which may potentially be suitable for use in applications including utility poles, railway sleepers and fencing. Thus, Infra-red (IR) analysis showed the presence of polypropylene (PP), polyethylene (PE) and polyethylene terephthalate (PET) in the commingled material. Differential scanning calorimetry (DSC) was used to determine glass transition temperatures and melting temperatures of each of the associated polymer types. Dynamic mechanical thermal analysis (DMTA) was used to determine the storage and loss modulus of the bulk commingled component. Lastly, flexural and tensile strengths of the re-formative polymer with differing proportions of glass fibre were assessed, giving a range of strengths at each glass fibre proportion for possible compositional variation in the polymer type. The recycled polymer is considered a viable structural material for replacing both wooden and concrete components generating a polymer recycling route with concomitant environmental benefits. This plastic recycling route therefore offers a solution towards achieving climate change targets with a purposeful end-product component.

Recycling, 2018, 3(4), 54;

https://doi.org/10.3390/recycling3040054

Analysis of the failure of a PPS polymer cycling support: Microscopy and Finite Element studies
Abstract:
A PPS polymer injection moulded arm-support for cyclists has been developed to allow cyclists to position their arms parallel with the frame of the bicycle for aerodynamic improvement. The component is therefore subjected to both vertically applied force and laterally applied force. The vertical force comes from the weight of the cyclist transferring down through the shoulder to the elbow and forearm, which rest on the component, and the lateral force arising when the cyclist’s arms try to push outwards for either power or stability. A component of this design suffered a sudden-onset fracture failure in-service. It was therefore of interest to understand why the component failed in this manner. The component was analysed by using electron microscopy methods at the fracture surface, performing a thermal testing analysis and mechanical data study of the reinforced PPS material to understand the material behaviour and lastly by using finite element (FE) analysis tools to predict the in-service mechanical fields of stress and strain. The resulting analyses highlighted that the failure was potentially caused by an abnormally high level loading, coupled with the potential for a manufacturing process induced void or defect which then acted as a nucleation site for a crack to propagate in the presence of a stress distribution.
Engineering Failure Analysis, 2018, 93, Pages 300-308