Oxidative regulation of the mechanical strength of a C–S bond

The mechanical strength of individual polymer chains is believed to underlie a number of performance metrics in bulk materials, including adhesion and fracture toughness.

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SuFExable Polymers with Helical Structures Derived from Thionyl Tetrafluoride (SOF4)

10.26434/chemrxiv.10005758 ◽

2019 ◽

Author(s):

Suhua Li ◽

Gencheng Li ◽

Bing Gao ◽

Sidharam P. Pujari ◽

Xiaoyan Chen ◽

...

Keyword(s):

Functional Polymers ◽

Polymer Chains ◽

New Materials ◽

Helical Structures ◽

Polymer Backbone ◽

Silyl Ethers ◽

Helical Polymer ◽

Key Characteristics ◽

Post Modification ◽

Individual Polymer

The first SuFEx click chemistry synthesis of SOF<sub>4</sub>-derived copolymers based upon the polymerization of bis(iminosulfur oxydifluorides) and bis(aryl silyl ethers) is described. This novel class of SuFEx polymer presents two key characteristics: First, the newly created [-N=S(=O)F-O-] polymer backbone linkages are themselves SuFExable and primed to undergo further high-yielding and precise SuFEx-based post-modification with phenols or amines to yield branched functional polymers. Second, studies of individual polymer chains of several of these new materials indicate the presence of helical polymer structures, which itself suggests a preferential approach of new monomers onto the growing polymer chain upon the formation of the stereogenic linking moiety.

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DMV 59

Alloy Digest ◽

10.31399/asm.ad.ni0672 ◽

2009 ◽

Vol 58 (8) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

High Mechanical Strength ◽

Temperature Performance

Abstract DMV 59 is the material of choice for a wide variety of applications where significant corrosion resistance and high mechanical strength is necessary. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-672. Producer or source: Mannesmann DMV Stainless USA Inc.

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DURCOMET 100

Alloy Digest ◽

10.31399/asm.ad.ss0540 ◽

1993 ◽

Vol 42 (2) ◽

Keyword(s):

Fracture Toughness ◽

Wear Resistance ◽

Corrosion Resistance ◽

Mechanical Strength ◽

Heat Treating ◽

Corrosion And Wear ◽

Annealed Condition ◽

Excellent Corrosion Resistance ◽

Wide Range ◽

Very High

Abstract Durcomet 100 is an improved version of Alloy CD-4 MCu with better corrosion and wear resistance. The alloy is used in the annealed condition and possesses excellent corrosion resistance over a wide range of corrosion environments. Mechanical strength is also very high. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and joining. Filing Code: SS-540. Producer or source: Duriron Company Inc.

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BOFORS 2RM2

Alloy Digest ◽

10.31399/asm.ad.ss0169 ◽

1965 ◽

Vol 14 (5) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Low Temperature ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Cast Steel ◽

Heat Treating ◽

High Mechanical Strength ◽

Temperature Performance

Abstract BOFORS 2RM2 is a hardenable stainless cast steel having good weldability, high mechanical strength and improved corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: SS-169. Producer or source: Aktiebolaget Bofors.

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ZERON 25

Alloy Digest ◽

10.31399/asm.ad.ss0584 ◽

1995 ◽

Vol 44 (3) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Hydrogen Sulfide ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

Oil Field ◽

Localized Corrosion ◽

Oil Gas

Abstract ZERON 25 is an alloy developed to combat severe oil field duties where oil, gas, water are contaminated with high levels of chlorides and hydrogen sulfide. The alloy has good mechanical strength and resistance to localized corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-584. Producer or source: Weir Material Services Ltd.

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SANDVIK 6R35

Alloy Digest ◽

10.31399/asm.ad.ss0699 ◽

1997 ◽

Vol 46 (11) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Elevated Temperatures ◽

Heat Treating ◽

Nickel Steel

Abstract SANDVIK 6R35 is an austenitic titanium stabilized chromium nickel steel with good mechanical strength at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-699. Producer or source: Sandvik.

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Advances in the Multi-Orthogonal Folding of Single Polymer Chains into Single-Chain Nanoparticles

Polymers ◽

10.3390/polym13020293 ◽

2021 ◽

Vol 13 (2) ◽

pp. 293

Author(s):

Agustín Blazquez-Martín ◽

Ester Verde-Sesto ◽

Angel J. Moreno ◽

Arantxa Arbe ◽

Juan Colmenero ◽

...

Keyword(s):

Computer Simulations ◽

Chemical Species ◽

Synthetic Polymers ◽

Review Article ◽

Polymer Chains ◽

Single Chain ◽

High Dilution ◽

Covalent Bonds ◽

Covalent Interactions ◽

Individual Polymer

The folding of certain proteins (e.g., enzymes) into perfectly defined 3D conformations via multi-orthogonal interactions is critical to their function. Concerning synthetic polymers chains, the “folding” of individual polymer chains at high dilution via intra-chain interactions leads to so-called single-chain nanoparticles (SCNPs). This review article describes the advances carried out in recent years in the folding of single polymer chains into discrete SCNPs via multi-orthogonal interactions using different reactive chemical species where intra-chain bonding only occurs between groups of the same species. First, we summarize results from computer simulations of multi-orthogonally folded SCNPs. Next, we comprehensively review multi-orthogonally folded SCNPs synthesized via either non-covalent bonds or covalent interactions. Finally, we conclude by summarizing recent research about multi-orthogonally folded SCNPs prepared through both reversible (dynamic) and permanent bonds.

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Understanding Silicon Nitride’s Biological Properties: From Inert to Bioactive Ceramic

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.782.289 ◽

2018 ◽

Vol 782 ◽

pp. 289-296 ◽

Cited By ~ 3

Author(s):

Elia Marin ◽

Alfredo Rondinella ◽

Francesco Boschetto ◽

Matteo Zanocco ◽

Brian J. McEntire ◽

...

Keyword(s):

Fracture Toughness ◽

Silicon Nitride ◽

Mechanical Strength ◽

Biological Properties ◽

Ionic Exchange ◽

Effective Protection ◽

Fusion Surgery ◽

Spinal Fusion Surgery ◽

Inert Surface ◽

Bioactive Ceramic

Due to the favourable combination of mechanical strength and fracture toughness, silicon nitride has been applied as a load-bearing bioceramic, in particular for implants used in spinal fusion surgery. Only recently it has been observed that the supposedly inert surface of silicon nitride is actually bioactive: a slow, but not negligible, pH controlled, ionic exchange between nitrogen and oxygen leads to the formation and elution of silicic acid and ammonia groups, also resulting in an effective protection against bacteria colonization. These properties could be further modulated by chemical and mechanical treatments.

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A Method to Determine Fracture Toughness Using Berkovich Indenter for Bulk Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.331.456 ◽

2013 ◽

Vol 331 ◽

pp. 456-460

Author(s):

Min He ◽

Duan Hu Shi ◽

Feng Yang ◽

Ning Zhang ◽

Hua Feng Guo

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Elastic Modulus ◽

Penetration Depth ◽

Effective Elastic Modulus ◽

Berkovich Indenter ◽

Bulk Materials ◽

Ductile Materials ◽

Penetration Depths ◽

Determine Fracture Toughness

An indentation approach with Berkovich indenter is proposed to determine fracture toughness for ductile materials. With decrease of effective elastic modulus, an approximate linear relationship between logarithmic plastic penetration depth and logarithmic effective elastic modulus, and a quadratic polynomial relationship between the plastic penetration depths and penetration loads are exhibited by indentation investigation with Berkovich indenter. The damage constructive equation of effective elastic modulus is proposed to determine the critical effective elastic modulus at the fracture point, which is the key problem to calculate the indentation energy to fracture. The critical plastic penetration depth is identified after the critical effective elastic modulus can be predicted by conventional mechanical properties. The fracture toughness is calculated according to the equation of penetration load, plastic penetration depth and the critical plastic penetration depth.

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