Results 41 to 50 of about 5,022 (153)

Curable liquid hydrocarbon prepolymers containing hydroxyl groups and process for producing same [PDF]

, 1978
Production of hydroxyl containing curable liquid hydrocarbon prepolymers by ozonizing a high molecular weight saturated hydrocarbon polymer such as polyisobutylene or ethylene propylene rubber is discussed. The ozonized material is reduced using reducing
Ingham, J. D., Rhein, R. A.
core   +1 more source

Light Stability of Laser‐Assisted Glass Encapsulated Perovskite Solar Cells under Different Atmospheres

Advanced Energy Materials, EarlyView.
This study presents a laser‐assisted glass‐frit encapsulation method for perovskite solar cells, comparing air‐, nitrogen‐, and CO2‐filled cavities. Results show that excluding oxygen and moisture significantly improves stability under illumination. The findings reveal the critical role of trapped gases in degradation, providing a pathway to durable ...
Marta Pereira, Jorge Martins, Rúben Madureira, Dzmitry Ivanou, Seyedali Emami, Adélio Mendes   +5 more
wiley   +1 more source

Correlation Dependence between Hydrophobicity of Modified Bitumen and Water Saturation of Asphalt Concrete

Applied Sciences, 2023
Improving the durability of asphalt concrete road surfaces by increasing their moisture resistance is an urgent task. Modified bituminous binders should be compacted into coatings with the lowest possible water saturation.
Antonina Dyuryagina, Yuliya Byzova, Kirill Ostrovnoy, Aida Lutsenko   +3 more
doaj   +1 more source

Volume Effects on the Glass Transition Dynamics [PDF]

, 2006
The role of jamming (steric constraints) and its relationship to the available volume is addressed by examining the effect that certain modifications of a glass-former have on the ratio of its isochoric and isobaric activation enthalpies.
Angell, Bartos, Bartos, Bendler, Bendler, Buchenau, C.M. Roland, Casalini, Casalini, Casalini, Casalini, Casalini, Casalini, Casalini, Danusso, Dreyfus, Dreyfus, Dudowicz, Dyre, Ferrer, Ferry, Fox, Gitsas, Goldstein, Grest, Hansen, K.J. McGrath, Kumar, León, Macedo, Mel’nichenko, Ngai, Pakula, Paluch, Paluch, Paluch, Papadopoulos, R. Casalini, Rah, Reiser, Roland, Roland, Roland, Roland, Roland, Roland, Roland, Roland, Saika-Voivod, Santangelo, Sastry, Schweizer, Shell, Stickel, Tarjus, Theobald, Ueberreiter, Urban, Williams, Williams   +59 more
core   +1 more source

Enabling Long Term, Shelf‐Stable Perovskite Solar Cells: Alumina Barriers to Protect Perovskite Devices from Moisture and Oxygen

Advanced Energy Materials, EarlyView.
This study reports a packaging strategy for perovskite photovoltaic devices using atomic layer deposition (ALD) of aluminum oxide. Through optimization of deposition temperature and oxidant chemistry, researchers develop a 50 nm barrier layer with superior water vapor (WVTR) and oxygen transmission rates (OTR).
Melissa A. Davis, Kelly Schutt, Duong Nguyen Minh, Xinwen Zhang, Chenchao Xie, Ross A. Kerner, Tianran Liu, Matthew O. Reese, Laura T. Schelhas, Michael D. Kempe, Axel F. Palmstrom, Joseph M. Luther   +11 more
wiley   +1 more source

Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies

Applied Sciences, 2021
Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency.
Wenhui Hou, Wei Wang, Yang Xiang, Yingjiao Li, Guangwen Chu, Haikui Zou, Baochang Sun   +6 more
doaj   +1 more source

Telechelic polyisobutylene with unsaturated end groups and with anhydride end groups [PDF]

, 1993
Anhydride terminated polyisobutylene (PIB) oligomers were synthesized in a one- or two-step process from chlorine terminated oligomers. In the one-step process, chlorine functional oligomers were just heated in the presence of maleic anhydride (MA) for ...
Gaymans, R.J., Walch, E.
core   +1 more source

Thermally Responsive Amphiphilic Conetworks and Gels Based on Poly(N‑isopropylacrylamide) and Polyisobutylene [PDF]

, 2013
Novel amphiphilic conetworks (APCN) consisting of thermoresponsive poly(N-isoproplyacrylamide) (PNiPAAm) cross-linked by hydrophobic methacrylate-telechelic polyisobutylene (MA-PIB-MA) were successfully synthesized in a broad composition range.
Alarco’n C. H., Aranaz I., Bartels J. W., Brostow W., Brun-Graeppi A. K., Bruns N., Bruns N., Bruns N., Bruns N., Béla Iván, Cheng H., Cheng T., Cui J., Dech S., Dech S., Ding A., Domján A., Domján A., Domján A., Erdodi G., Feil H., Fodor Cs., Fodor Cs., Fodor Cs., Gergely Kali, Haesslein A., Haigh R., Hanko M., Haraszti M., Heskins M., Hoffman A. S., Hu J. M., Huang G. Y., Isayeva I. S., Iván B., Iván B., Iván B., Iván B., Iván B., Iván B., Jewrajka S. K., Kali G., Kali G., Kali G., Kamata H., Kanazawa H., Kang J., Kennedy J. P., Kennedy J. P., Kennedy J. P., Kennedy J. P., Kohori F., Krisztina László, Lee C. B., Lee E. L., Lee J. S., Lequieu W., Li Y. M., Lin C., Liu S., László K., László K., László K., Mangeney C., Mano V., Mespouille L., Naddaf A. A., Nagase K., Patrickios C. S., Rikkou-Kalourkoti M., Rimmer S., Rimmer S., Sato T., Savin G., Scherble J., Schild H. G., Shibayama M., Sugimoto H., Sugimoto H., Szilvia Vavra, Takahasi A., Tanaka T., Tobis J., Tobis T., Toman L., Virtanen J., Wang S., Wang Y., Wei H., Wooten W. C., Xu F., Xu J. K., Yang M., Zrinyi M.   +93 more
core   +1 more source

Spheres, tears, and spears: Regulating the perimeter and circularity of millimeter‐sized alginate hydrogel beads

AIChE Journal, EarlyView.
Abstract Generating hydrogel beads pertains to many engineering applications. We examined two alginate‐based fluids at three concentrations of alginate, cAG$$ {c}_{\mathrm{AG}} $$. We used the “Map of Misery” to determine which material property (viscosity, elasticity, and inertia) drives droplet formation.
Conor G. Harris, Katherine D. Bandettini, Hannah K. Gedde, Lewis Semprini, Kaitlin C. Fogg, Willie E. Rochefort   +5 more
wiley   +1 more source

Difunctional polyisobutylene prepared by polymerization of monomer on molecular sieve [PDF]

, 1970
Process yields difunctional isobutylene polymers ranging in molecular weight from 1150 to 3600. These polymers have the potential for copolymerization and cross-linking with other monomers to form elastomeric ...
Midler, J. A., Jr.
core   +1 more source