Results 21 to 30 of about 3,337 (294)

Accessing Divergent Main-Chain-Functionalized Polyethylenes via Copolymerization of Ethylene with a CO2/Butadiene-Derived Lactone

, 2021
Carbon dioxide (CO2) has been used as a sustainable comonomer in the synthesis of different functional polymers including polycarbonates, polyurea, and polyurethane.
Shan Tang, Shan Tang (1600243), Yajun Zhao (491464), Kyoko Nozaki (1616881), Kyoko Nozaki, Yajun Zhao   +5 more
core   +1 more source

Unveiling the Effects of Thermal Aging on the Oxidative Stability of Biobased Low-Density Polyethylenes [PDF]

ACS Omega
Joanna Aniśko-Michalak, Anatolij Sokolohorskyj, Izabela Szafraniak-Wiza, Paulina Kosmela, Adam Piasecki, Mateusz Barczewski   +5 more
doaj   +2 more sources

Friction and wear of two polyethylenes under different tribological contact conditions

, 2021
Tribological properties of ultrahigh-molecular weight polyethylene (UHMWPE) and cross-linked polyethylene (XLPE) were studied in two different wear modes. Firstly, reciprocating sliding wear studies under non-conformal contact investigated the effects of
Wäsche, Rolf, Joyce, T. J., Harsha, A. P.   +2 more
core   +1 more source

The effect of modality on linear low-density polyethylene crystallization behaviour at high and very high supercoolings; pp. 53–57 [PDF]

Proceedings of the Estonian Academy of Sciences, 2009
Isothermal crystallization rates of uni- and bimodal linear low density polyethylenes having similar average molar mass and branching content were analysed at various temperatures in a very high supercooling range by means of a novel method – chip ...
Triin Märtson, Andres Krumme, Veronika Gavrilkina, Anti Viikna   +3 more
doaj   +1 more source

Direct Synthesis of Polyethylene Thermoplastic Elastomers Using Hybrid Bulky Acenaphthene-Based α-Diimine Ni(II) Catalysts

Molecules, 2023
Recently, polyolefin thermoplastic elastomers can be obtained directly using ethylene as a single feedstock via α-diimine nickel-catalyzed ethylene chain walking polymerization.
Hui Wang, Weiqing Lu, Mingmin Zou, Shengyu Dai   +3 more
doaj   +1 more source

Correlation of cross-linking as measured by the trans-vinylene index and in vitro wear of polyethylene from various acetabular liner brands

Bone & Joint Research
Aims: Highly cross-linked polyethylene (HXLPE) greatly reduces wear in total hip arthroplasty, compared to conventional polyethylene (CPE). Cross-linking is commonly achieved by irradiation. This study aimed to compare the degree of cross-linking and in
Peter Wahl, Roman Heuberger, Andrea Pascucci, Thomas Imwinkelried, Markus Fürstner, Niels Icken, Michel Schläppi, Robin Pourzal, Emanuel Gautier   +8 more
doaj   +1 more source

Recent update on crosslinked polyethylene in total hip arthroplasty

SICOT-J, 2020
More than two decades after their clinical introduction, crosslinked polyethylenes (XLPE) have been widely adopted. Though concerns were initially raised regarding oxidation and brittleness, on a large scale, the first generation of XLPE continues to be ...
Langlois Jean, Hamadouche Moussa
doaj   +1 more source

Ultra-strong long-chain polyamide elastomers with programmable supramolecular interactions and oriented crystalline microstructures

Nature Communications, 2019
Long-chain polyamides could bridge the gap between traditional polyamides and polyethylenes. Here the authors show the preparation of diamide diene monomers derived from natural resources coupled by thiol-ene addition copolymerization to form long-chain ...
Lingzhi Song, Tianyu Zhu, Liang Yuan, Jiangjun Zhou, Yaqiong Zhang, Zhongkai Wang, Chuanbing Tang   +6 more
doaj   +1 more source

Photodegradation of polyethylenes: Comparative effect of Fe and Ca-stearates as pro-oxidant additives

, 2010
The effect of iron and calcium stearates on the degradation of polyethylene (LDPE and LLDPE), under natural and artificial exposure, has been studied. The activity of stearates has been evaluated by chemiluminescence and FTIR of polyethylenes.
T. Corrales, F. Catalina, Marín, I., López-Marí, J., Abrusci Bernal, Concepción, E. Espí, Espí, E., C. Abrusci, J. López-Marín, Corrales, T., J.L. Pablos, I. Marín, Pablos Lagartos, Jesús Luis, Catalina, F.   +13 more
core   +1 more source

Comparison of the influence of Cu micro- and nano-particles on the thermal properties of polyethylene/Cu composites

eXPRESS Polymer Letters, 2009
Polyethylene (LDPE, LLDPE and HDPE) composites with different copper (micro- and nano-sized particles) contents were prepared by melt mixing and compression moulding.
doaj   +1 more source