Results 241 to 250 of about 69,850 (269)

Tribological investigation of oriented HDPE

Journal of Biomedical Materials Research, 2002
AbstractThe possibility to control the wear properties of high‐density polyethylene (HDPE) material at an early processing stage is explored. Wear measurements of cold roll‐drawn HDPE with two different draw ratios were carried out for three sliding planes, each in two directions.
Mohammed, Hoseini, Jukka, Lausmaa, Antal, Boldizar   +2 more
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������������ ������ ������������������ ������������������������ ���������������������������� �������� UV ���������������������� ������ HDPE

2010
In the present study different series of HDPE nanocomposites were prepared by melt mixing on a Haake-Buchler Reomixer, containing 2.5 wt% of multiwall carbon nanotubes, pristine and modified montmorillonite, and SiO2 nanoparticles. Nanocomposites in the form of thin films were exposed to UV irradiation at 280 nm at constant temperature (25 C) and ...
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Simulation of the extrusion of HDPE and HDPE/UHMWPE blends

European Polymer Journal, 1993
Abstract A Criminale-Ericksen-Filbey (CEF) constitutive equation was used to simulate the behaviour of HDPE samples of different molecular weights and blends with UHMWPE. Shear rate dependent viscosity and first normal stress coefficient data were obtained by capillary rheometry. The extruder operation point was calculated by using the central finite
Rosario E.S. Bretas, Carlos Granado
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Impact of ultraviolet radiation on HDPE and HDPE/STC blends

Polymers for Advanced Technologies, 2008
AbstractThe structure and properties of high‐density polyethylene (HDPE) ultraviolet irradiated in ozone atmosphere were studied by FTIR, XPS, GPC, XRD, DSC, TG, gel, and contact angle test. The oxygen‐containing groups such as CO, CO, and C(O)O were quickly introduced onto HDPE chains through ultraviolet irradiation in ozone atmosphere; their ...
Min Qiao, Qianping Ran, Shishan Wu, Jian Shen   +3 more
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������������ ������������������ ���������������� Cu �������� ������������������ ������ HDPE

2013
( ), , CNRS (Centre National de la Researche Scientifique, )
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Rheological behavior comparison between PET/HDPE and PC/HDPE microfibrillar blends

Polymer Engineering & Science, 2005
AbstractThe rheological behaviors of in situ microfibrillar blends, including a typical semicrystalline/semicrystalline (polyethylene terephthalate (PET)/high‐density polyethylene (HDPE)) and a typical amorphous/semicrystalline (polycarbonate (PC)/HDPE) polymer blend were investigated in this study.
Hong‐Sheng Xu, Zhong‐Ming Li, S.Y. Yang, Ji‐Lin Pan, Wei Yang, Ming‐Bo Yang   +5 more
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Compatibilization of irradiated HDPE

Journal of Thermoplastic Composite Materials, 2014
The C–O, C=O, and C(=O)O groups were introduced onto high-density polyethylene (HDPE) chains by ultraviolet irradiation in air and the groups’ content increased with increase in the irradiation time. When they irradiated for 16 h, gels were formed in the irradiated HDPE, and the content of the gels increased with increase in the irradiation time ...
Hui Jin, Zhong-yan Chen, Qian-qian Yu, Shi-shan Wu   +3 more
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Coextruded HDPE/VLDPE Multilayer Geomembranes

Geotextiles and Geomembranes, 1991
Abstract High density polyethylene (HDPE) geomembranes have been used extensively during the last decade and very low density (VLDPE) geomembranes have been introduced during the last few years. Both materials have properties that are desirable for particular applications. HDPE has excellent chemical resistance, UV resistance and high modulus.
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Durability of HDPE geomembranes

Geotextiles and Geomembranes, 2002
This paper summarizes the basic concepts and mechanisms related to the durability of HDPE geomembranes and discusses the factors influencing the service life of geomembrane liners.Geomembrane durability is addressed in terms of field performance and laboratory test results under various conditions.It discusses their projected service lives that may ...
R.Kerry Rowe, Henri P Sangam
openaire   +1 more source