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Kang MK, Choi S, Song HH. Microstructural investigation of butt-fusion joint in high-density polyethylene pipes using wide- and small-angle X-ray scattering. J Appl Polym Sci 2018. [DOI: 10.1002/app.45668] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Min Kwan Kang
- Department of Advanced Materials and Chemical and Engineering; Hannam University; Daejeon 34054 Korea
| | - Sunwoong Choi
- Department of Advanced Materials and Chemical and Engineering; Hannam University; Daejeon 34054 Korea
| | - Hyun Hoon Song
- Department of Advanced Materials and Chemical and Engineering; Hannam University; Daejeon 34054 Korea
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Zhang R, Tang P, Shi R, Cheng T, Bin Y, Hu S. Improved electrical heating properties for polymer nanocomposites by electron beam irradiation. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2172-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Berger K, Keimel C, Helfer E, Haar B, Mattausch H, Riess G, Kern W. The effects of e-beam crosslinking of LDPE on the permeation of hydrocarbons. J Appl Polym Sci 2017. [DOI: 10.1002/app.44968] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Katrin Berger
- Polymer Competence Center Leoben GmbH; Roseggerstraße 12 Leoben 8700 Austria
| | - Christian Keimel
- Polymer Competence Center Leoben GmbH; Roseggerstraße 12 Leoben 8700 Austria
| | - Eric Helfer
- Chair in Chemistry of Polymeric Materials; Montanuniversitaet Leoben; Otto-Glöckel-Straße 2 Leoben 8700 Austria
| | - Bernd Haar
- Polymer Competence Center Leoben GmbH; Roseggerstraße 12 Leoben 8700 Austria
| | - Hannelore Mattausch
- Chair in Polymer Processing; Montanuniversitaet Leoben; Otto-Glöckel-Straße 2 Leoben 8700 Austria
| | - Gisbert Riess
- Chair in Chemistry of Polymeric Materials; Montanuniversitaet Leoben; Otto-Glöckel-Straße 2 Leoben 8700 Austria
| | - Wolfgang Kern
- Polymer Competence Center Leoben GmbH; Roseggerstraße 12 Leoben 8700 Austria
- Chair in Chemistry of Polymeric Materials; Montanuniversitaet Leoben; Otto-Glöckel-Straße 2 Leoben 8700 Austria
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Microstructure and Mechanical Properties of the Butt Joint in High Density Polyethylene Pipe. INT J POLYM SCI 2016. [DOI: 10.1155/2016/6483295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The microstructure and mechanical properties of the butt joint in high density polyethylene (HDPE) pipes were evaluated by preparing the joints with increasing the cooling time from 10 s to 70 s before pressure created for fusion of the pipes. Here, cold fusion flaws in HDPE butt joint were created with increasing the cooling time around 70 s caused by the close molecular contact followed by insufficient interdiffusion of chain segments back and forth across the wetted interface. The tensile failure mechanism of the welded pipes at different fusion time was projected based on the tensile test of dog-bone shaped, fully notched bar type as well as round U-notched specimens. The mechanical properties of the joints at different fusion time were correlated with the corresponding fracture surface morphology. The weld seam as well as tensile fracture surfaces were etched using strong oxidizing agents. The crystallinity of surface etched weld zone by potassium permanganate based etchant was found higher than unetched sample due to the higher susceptibility of amorphous phase of polyethylene with oxidizing agent. The U-notched tensile test of butt welded HDPE pipe and surface etching of the weldments provided clear delineation about the joint quality.
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