Simulations of Crazing in Polymer Glasses:  Effect of Chain Length and Surface Tension

2001 ◽  
Vol 34 (12) ◽  
pp. 4200-4209 ◽  
Author(s):  
A. R. C. Baljon ◽  
Mark O. Robbins
Keyword(s):  
Surface Tension ◽  
Chain Length ◽  
Polymer Glasses

Synthesis and Properties of Anionic Maleic Monoester Carboxylate Polymeric Surfactants

2014 ◽  
Vol 1033-1034 ◽  
pp. 26-29
Author(s):  
Ling Dong ◽  
Ke Ming Xu ◽  
Bao Hui Wang ◽  
Cheng Chen
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Maleic Anhydride ◽  
Sodium Hydroxide ◽  
Thermodynamic Parameters ◽  
Chain Length ◽  
High Adsorption ◽  
Polymeric Surfactants ◽  
Good Surface ◽  
Linear Alcohols

Four anionic maleic monoester carboxylate polymeric surfactants were synthesized by the reaction of maleic anhydride with linear alcohols of different chain length in the ratio of 1:1.1 under 80 °C. Then the intermediate products were neutralized by sodium hydroxide at 60 °C to produce the final monomers. The structures of products were confirmed by FTIR. The surface tension was measured at 45 °C and the thermodynamic parameters were calculated. The results show that the polymeric surfactants possess low critical micelle concentration (CMC), high adsorption affinities and good surface and interfacial activity.

Rna Chain Length and Stoichiometry Govern Surface Tension and Stability of Protein-RNA Condensates

2021 ◽  
Author(s):  
Rabia laghmach ◽  
Ibraheem Alshareedah ◽  
Matthew Pham ◽  
Muralikrishna Raju ◽  
Priya Banerjee ◽  
...  
Keyword(s):  
Surface Tension ◽  
Chain Length

Wettability of Maleimide Copolymer Films:  Effect of the Chain Length ofn-Alkyl Side Groups on the Solid Surface Tension

2001 ◽  
Vol 34 (19) ◽  
pp. 6768-6775 ◽  
Author(s):  
K. Grundke ◽  
S. Zschoche ◽  
K. Pöschel ◽  
T. Gietzelt ◽  
S. Michel ◽  
...  
Keyword(s):  
Surface Tension ◽  
Chain Length ◽  
Solid Surface ◽  
Copolymer Films ◽  
Solid Surface Tension

Manganese and zinc absorption with octylphenoxyethanol surfactants by soybean leaf tissues

1973 ◽  
Vol 51 (3) ◽  
pp. 613-620 ◽  
Author(s):  
E. G. Beauchamp
Keyword(s):  
Surface Tension ◽  
Ethylene Oxide ◽  
Interfacial Tension ◽  
Chain Length ◽  
Surfactant Concentration ◽  
Corn Oil ◽  
Surfactant Solution ◽  
Soybean Leaf ◽  
Chain Lengths ◽  
Leaf Disks

Soybean leaf disks were used to study the effect of ethylene oxide (EO) chain length in a homologous series of octylphenoxyethanol surfactants on Mn and Zn absorption while floating on solutions in which CaSO4 was either absent or present. Octylphenoxyethanol surfactants with EO chain lengths of 5, 7–8, 9–10, 12–13, and 30 ethylene oxide groups per molecule of surfactant were included in the study.Zn absorption was enhanced whereas Mn absorption was decreased in the presence of 0.5 mM CaSO4. However, the presence of CaSO4 had relatively little influence on the effectiveness of the surfactants in enhancing Mn or Zn absorption. In general, surfactants of intermediate EO chain length enhanced Mn or Zn absorption to the greatest extent. Triton X-114 (EO = 7–8) generally tended to cause the greatest enhancement.The surface tension generally increased as the EO chain length increased. As the surfactant concentration was increased from 0.075 to 0.75 mM, the surface tension decreased but then tended to increase as the surfactant concentration was increased further to 7.5 mM. The interfacial tension measured at a corn oil/surfactant solution interface generally decreased with EO chain length at the 0.075 mM surfactant concentration. However, the interfacial tension decreased and then increased as the EO chain length increased at the 0.75 and 7.5 mM concentrations. Neither surface tension nor interfacial tension values could be directly associated with enhanced Mn or Zn absorption by soybean leaf disks. Also, the hydrophile–lipophile balance of the surfactants was not directly associable with enhanced Mn or Zn absorption.

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