Electron microscopy of solvent‐etched polyethylene surfaces

Mackie, J. S.; Rudin, Alfred

doi:10.1002/pol.1961.1204915222

Cited by 22 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To meet the growing demand for improved properties in existing and emerging applications, new grades of HDPE with different physical and chemical properties have been developed. Such new HDPE composition can be achieved by modifying the resin structure or by adding a certain amount of additives to HDPE [4,5]. Furthermore, HDPE gradually appears in the natural environment in the form of micro plastic, which affect the physiology and productivity of organisms [6], and adsorbs pollutants [7,8].…”

Section: Introductionmentioning

confidence: 99%

Characterizations of high-density polyethylene by terahertz time-domain spectroscopy

Zhang,

Zheng

et al. 2023

TST

View full text Add to dashboard Cite

The optical properties of high-density polyethylene (HDPE) in the terahertz band are characterized by terahertz time-domain spectroscopy (THz-TDS). The results show that the THz-TDS can effectively distinguish the particle size of HDPE and filler content of HDPE. And it can also be used to characterize the adsorption characteristics of HDPE. These indicate that it can improve the performance of HDPE, industrial production and even environmental pollution of micro-size of HDPE.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterizations of high-density polyethylene by terahertz time-domain spectroscopy

Zhang,

Zheng

et al. 2023

TST

View full text Add to dashboard Cite

show abstract

“…The strength and the quality of a joint depend on not only the geometry of the weld bead through a slight or a stronger notch effect but also the microstructure of welded area [6,11]. In that line, various factors such as welding parameters and thermal history of polymer have been recognized on the strength and the quality of a weld seam [12,13]. Different mechanical testing methods are used to determine the weld seam force transmission.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of the Butt Joint in High Density Polyethylene Pipe

Pokharel

Kim

Choi

2016

International Journal of Polymer Science

View full text Add to dashboard Cite

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.

show abstract

Organic solvent treatment of isotactic polypropylene films, 1. Effects of organic solvent treatment on proton spin‐lattice and spin‐spin relaxation times

Tanaka

Yoshida

1983

Angew. Makromol. Chem.

View full text Add to dashboard Cite

An isotactic polypropylene film was treated with cyclohexane, toluene, 1 -chloronaphthalene, and glycerin. The morphological changes were characterized by measurements of weight loss, density, molecular weight, and spin-lattice and spin-spin relaxation times. There is a relatively narrow temperature range at which a sharp increase in weight loss occurs corresponding to the kind of the solvent. The change in density occurs almost linearly with treatment time for all solvents. Molecular weight also increases as the weight loss is increased. There is a considerable increase in TI with increasing treatment temperature. T, of the amorphous region, T,,, also increases as the treatment temperature is increased, but some decrease in T,, is found in the samples treated with toluene and cyclohexane at higher temperatures. The fraction of the rigid region, F,, increases and that of the mobile one, Fa, decreases with proceeding solvent extraction. The value of F, is considerably different from the crystallinity calculated from the density in the early stage of the treatment followed by the gradual approach to the value calculated from the density, although some different behaviour was found with the samples treated with cyclohexane. ZUSAMMENFASSUNG:Ein isotaktischer Polypropylenfilm wurde mit Cyclohexan, Toluol, 1-Chlornaphthalin und Glyzerin behandelt. Die h d e r u n g der Morphologie wurde durch Messung des Gewichtsverlusts, der Dichte, des Molekulargewichts, der Spin-Gitter-und der Spin-Spin-Relaxationszeiten bestimmt. Es gibt einen relativ engen Temperaturbereich, in dem eine starke Zunahme des Gewichtsverlusts beobachtet wird, die von der Art des Losungsmittels abhangt. Die Dichteanderung hangt fur alle Losungsmittel linear von der Behandlungsdauer ab. Das Molekulargewicht steigt ebenfalls mit steigendem Gewichtsverlust. Die Zunahme von T, mit steigender Temperatur ist beachtlich. T, des amorphen Bereichs (T2J steigt ebenfalls, wenn die Temperatur erhoht wird, es wird jedoch eine gewisse Abnahme von T,, an den mit Toluol und Cyclohe-0 1983 Huthig& Wepf Verlag, Base1 0003-3146/83/%03.00/0 31 H. Tanaka and Y. Yoshida xan bei hdherer Temperatur behandelten Proben gefunden. Der Anteil des starren Bereichs (TJ steigt an und der des mobilen Bereichs sinkt ab mit zunehmender Ldsungsextraktion. Der Wert fur T, ist recht verschieden von dem kristallinen Anteil, der aus der Dichte am Beginn der Behandlung berechnet wird, gefolgt von einer allmahlichen Annaherung an den Wert, der aus der Dichte errechnet wird, wobei jedoch bei den mit Cyclohexan behandelten Proben ein etwas anderes Verhalten gefunden wurde.

show abstract

Electron microscopy of solvent‐etched polyethylene surfaces

Cited by 22 publications

References 6 publications

Characterizations of high-density polyethylene by terahertz time-domain spectroscopy

Characterizations of high-density polyethylene by terahertz time-domain spectroscopy

Microstructure and Mechanical Properties of the Butt Joint in High Density Polyethylene Pipe

Organic solvent treatment of isotactic polypropylene films, 1. Effects of organic solvent treatment on proton spin‐lattice and spin‐spin relaxation times

Contact Info

Product

Resources

About