Results 11 to 20 of about 774,640 (308)
Melt flow ratio: A way to identify the type of polyethylene
Advanced Industrial and Engineering Polymer Research, 2023 Melt flow ratio (MFR or I21/I2) was measured for dozens of polyethylene (PE) in the melt index (MI or I2) range of 1–10 for various types of PE. I21/I2 for samples of linear low density polyethylene (LLD) polymerized by a Ziegler-Natta catalyst (ZN-LLD ...
Kejie Xu, Yuan Wen, Xiangbin Xu
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Molecular-Weight-Dependent Infiltration and Adsorption of Polymers into Nanochannels
, 2023 The mesoporous silica shell coating hydrogenolysis nano-catalysts alters the molecular weight distributions of cleaved polymer chains compared to catalysts without a shell. The shell, composed of radially aligned narrow cylindrical nanopores, reduces the
Max Meirow (14500144) +7 more
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Die Fraktionierung von Polymethylmethacrylaten nach dem Molekulargewicht durch Gegenstromverteilung
CHIMIA, 1973 A polydisperse sample of polymethylmethacrylate with an average molecular weight of 168000 has been fractionated by countercurrent distribution into fractions of different molecular weight using a phase pair prepared from acetone, n-hexane and water.
P. von Tavel, J. Wälchli, H. Rüfenacht
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Molecules, 2022 Spruce (Piceaabies) wood hemicelluloses have been obtained by the noncatalytic and catalytic oxidative delignification in the acetic acid-water-hydrogen peroxide medium in a processing time of 3–4 h and temperatures of 90–100 °C. In the catalytic process,
Valentina S. Borovkova +12 more
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High and low molecular weight crossovers in the longest relaxation time dependence of linear cis-1,4 polyisoprene by dielectric relaxations [PDF]
, 2010 The dielectric relaxation of cis-1,4 Polyisoprene [PI] is sensitive not only to the local and segmental dynamics but also to the larger scale chain (end-to-end) fluctuations.
Alegría, Angel +4 more
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Química Nova, 2008 The main topics related to the use of dual-site catalysts in the production of polymers with broad molecular weight distribution are reviewed. The polymerization using dual-site catalysts is more economical and allows to produce a higher quality product ...
João H. Z. dos Santos +3 more
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Physicochemical Properties of ACE Inhibitory Peptides from Jujube Kernel by Enzymatic Method
Shipin gongye ke-ji, 2022 In this study, the defatted jujube kernel residue was extracted by alkali solubilization and acid seperation method to obtain jujube kernel protein, and the angiotensin converting enzyme (ACE) inhibitory peptide was obtained by enzymatic hydrolysis of ...
Liming TAN +4 more
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Rheological measurement of molecular weight distribution of polymers
e-Polymers, 2013 This paper has described a method to obtain the molecular weight distribution (MWD) of polymeric materials from their rheological data. The method has been developed for linear polymers with log normal molecular weight distribution.
Khak Maryam, Ramazani Ahmad
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A Comparative Study between FRP and ATRP of Styrene by Monte Carlo Simulation: Effect of Free Radical Mobility [PDF]
علوم و تکنولوژی پلیمر, 2010 Styrene polymerization through FRP and ATRP methods was carried out at 110oC, while in-depth studies were performed by Monte Carlo simulation.The changes in monomer conversion, initiator concentration, average molecular weight, and polydispersity index ...
M. Najafi +3 more
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Shipin gongye ke-ji, 2022 Using the protein of Cucumaria frondosa visceral mass as raw material, antio-xidant peptides were prepared by enzymatic hydrolysis with complex protease.
Yunlong GAO, Menghao XU, Xiangzhong ZHAO
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