Influence of orientation of extrusion direction and strain rate on the mechanical behaviour of extruded thermoplastic sheets

Varghese, Jerry; Ramu, M.

doi:10.1016/j.matpr.2018.10.197

Cited by 2 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The literature is very extensive in regards to studies on ABS, and includes studies related to degradation [14], composition in recycling [13], behavior in the extrusion process [15], and alternative polymeric mixtures [16] that aim to improve its properties. Using a mechanical analysis, the work carried out by BOLDIZAR and MÖLLER [14] sought to evaluate the degradation of ABS during repeated processing cycles, and it was observed that from the second to the sixth cycle the elongation of the rupture calculated by the tensile test presented a drastic drop, due to the repetitive extrusion processing.…”

Section: Introductionmentioning

confidence: 99%

“…The research carried out by VARGHESE and MURUNGAN [15] investigated the influence of the deformation rate in ABS, high density polyethylene (HDPE) and isotactic polypropylene (PP-I) as a function of extrusion on the mechanical behavior. Uniaxial stress tests were performed in samples cut in three different orientations (0 o , 45 o and 90 o ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Different rotations in the acrylonitrile-butadiene-styrene extrusion process and their influence on fracture and mechanical properties

Neto,

Teixeira Junior,

Costa

et al. 2023

Matéria (Rio J.)

View full text Add to dashboard Cite

ABS resins have wide application in the market, mainly in the manufacture of household appliances, telephones, automotive industry and others, and need to be processed by extrusion for the manufacture of products. The variables used in the process of extrusion of polymers have a direct influence on their mechanical properties. The objective of this study was to evaluate the different speeds of the extruder screw (15, 30, 45 and 60 rpm) on the mechanical properties of raw ABS after the extrusion process. Izod impact resistance and tensile tests, were also performed. The fractures of the samples tested by Izod impact were observed via optical microscopy, scanning electronic microscopy (SEM), and roughness was measured. Calorimetric tests (DSC) and thermogravimetry (TGA), as well as melt flow index (MFI), were also performed. The most significant results were observed for the extruder screw speed of 60 rpm. For the impact test, a reduction in impact energy of approximately 3% was observed, with the same result for tensile resistance. However, an increase in the value of the elastic modulus and the MFI was observed due to the increase in the degree of crystallinity, which was caused by the higher shear of the polymer mass in the screw of the extrusion equipment. Additionally, an atypical case occurred for the ABS polymer in the highest rotation, since it was the polymer that suffered the greatest shear in the polymer chains due to the degradation of the butadiene phase.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Different rotations in the acrylonitrile-butadiene-styrene extrusion process and their influence on fracture and mechanical properties

Neto,

Teixeira Junior,

Costa

et al. 2023

Matéria (Rio J.)

View full text Add to dashboard Cite

show abstract

“…In the direction perpendicular to the orientation, the elongation will be greater, but the strength less. This phenomenon is very well known in extruded plates [8,[11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Orientation results in thermoformed products distortion, which largely affects the quality of ready products made of extruded plates.…”

Section: Introductionmentioning

confidence: 99%

Shear-Induced Molecular Orientation of Compression Moulded PE-HD Sheets

Chomiak¹,

Stabik²

2022

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

The article presents experimental results on orientation of polymer macromolecules in compression moulded high density polyethylene sheets. Properties anisotropy of thermoplastic films or sheets, that are usually formed in the extrusion process, causes deformation of thermoformed products and is a serious technological problem. One of the possible solutions of this problem is application of compression moulded sheets. The paper presents the results of tests of selected strength characteristics of compression moulded PE-HD sheets. A static tensile test was performed and Charpy impact strength was determined. Additionally Chrystler's orientation test was executed. For comparison the same experiments were performed on extruded sheets. Samples were cut in directions perpendicular and parallel to the direction of polymer flow in pressing and extrusion processes. The obtained results indicate that the compression moulding technique allows the production of sheets that do not exhibit statistically significant anisotropy of the tested strength properties.

show abstract

Influence of orientation of extrusion direction and strain rate on the mechanical behaviour of extruded thermoplastic sheets

Cited by 2 publications

References 14 publications

Different rotations in the acrylonitrile-butadiene-styrene extrusion process and their influence on fracture and mechanical properties

Different rotations in the acrylonitrile-butadiene-styrene extrusion process and their influence on fracture and mechanical properties

Shear-Induced Molecular Orientation of Compression Moulded PE-HD Sheets

Contact Info

Product

Resources

About