Preparation of a novel poloxamer hydrogelWiley - Tập 88 Số 11 - Trang 2670-2676 - 2003
HaeYong Kweon, Mi‐Kyong Yoo, Jin‐Hak Lee, Won‐Ryang Wee, Young‐Gun Han, Kwang‐Gill Lee, Chong‐Su Cho
AbstractPoloxamer hydrogels were prepared by photopolymerization from poloxamer macromer, which was synthesized by reaction of poloxamer 407 with acryloyl chloride. The synthesis of poloxamer macromer was confirmed using NMR and FTIR spectrometry. The gelation behavior and crystalline structure of poloxamer macromer was similar to those of poloxamer 407 itself; how...... hiện toàn bộ
Service lifetime prediction of nitrile butadiene rubber gaskets used in plate heat exchangersWiley - Tập 139 Số 28 - 2022
Mateus de Sousa Zanzi, Elias Luiz de Souza, Gabriel Benedet Dutra, Kleber Vieira de Paiva, J.L.G. Oliveira, Tiago Vieira da Cunha, André Sampaio Monteiro
AbstractGasketed plate heat exchangers are characterized in a usual heat exchanger class. These systems employ elastomeric gaskets as the sealing element. Several conditions lead to oxidation and deterioration of these materials and their properties. In addition, the complex geometry of the gaskets and operation conditions may cause divergence in the expected aging...... hiện toàn bộ
Preparation and properties of a salt‐resistant superabsorbent polymerWiley - Tập 93 Số 6 - Trang 2532-2541 - 2004
Songmei Ma, Mingzhu Liu, Zhenbin Chen
AbstractCrosslinked sodium polyacrylate was prepared by solution polymerization with N,N‐methylene‐bisacrylamide (bisAM) as crosslinking agent; it was subsequently surface‐crosslinked by ethylene glycol diglycidyl ether (EGDE) and then was modified with inorganic salt to obtain a superabsorbent with water absorb...... hiện toàn bộ
A new equation for estimating [η] from single‐viscosity measurement in dilute solutionWiley - Tập 45 Số 4 - Trang 677-681 - 1992
K. V. S. N. Raju, Mohammed Yaseen
AbstractThe use of a linear two‐parameter approximation for determining limiting viscosity number, [η], of a polymer in the state of infinite dilution requires considerable amount of time, effort, and materials. Several workers who attempted to estimate [η] directly from single‐viscosity measurement also proposed equations for this purpose. Such equations are teste...... hiện toàn bộ
Carbonization behavior of polyimide films with various chemical structuresWiley - Tập 44 Số 3 - Trang 521-525 - 1992
Michio Inagaki, Tsutomu Ibuki, Tsutomu Takeichi
AbstractSix kinds of polyimide films with different molecular structures were synthesized and carbonized up to 1100°C. The carbonization behavior of polyimides was followed by measuring the changes in weight, size, and electrical conductivity. Pyrolysis gases evolved on the way to carbonize up to 1000°C were analyzed by gas chromatography.All films...... hiện toàn bộ