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Kirkpatrick,

doi:10.1016/s0955-1662(98)00072-1

Cited by 4 publications

(1 citation statement)

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“…The conventional approaches to introduce ductility into glassy resins are the addition of a plasticizer or rubber component. [ 11–15 ] The addition of plasticizer increases the free volume of the glassy chains, enhancing the molecular mobility. The stress for shear yielding becomes lowered owing to such effects, and ductile fracture is generated.…”

Section: Introductionmentioning

confidence: 99%

Preparation of All Amorphous PMMA Resins Based on the Graft Architecture with a Flexible Main Chain for Simultaneous Enhancement of Thermal and Mechanical Toughness

Yamawake

Hayashi

Nobukawa

2022

Macro Chemistry & Physics

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This study shows the design of poly(methyl methacrylate) (PMMA)-based glassy polymers with simultaneous improvement of thermal resistance and mechanical toughness, based on the graft architecture with a low glass transition (T g ) flexible main chain. The microphase-separated structure of the flexible main chain and the glassy graft chains in this design may be key to these improved properties. Notably, the graft copolymer depicts the ductile fracture, and the microscopy observation for the fractured sample exhibits the presence of abundant void formation with relatively homogenous size and interval throughout the sample. The void formation could originate from the preferential fracture of aggregated flexible components distributed throughout the sample, indicating the effective role of the flexible main chain on the suppression of the internal stress. The novelty of the present study is on the use of simple graft architecture for enhancing the toughness of glassy resins. This idea is indeed distinct from the conventional approach to improve toughness by adding plasticizer or rubber particles, therefore opening a new method for the creation of high-functional glassy polymers.

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Section: Introductionmentioning

confidence: 99%

Preparation of All Amorphous PMMA Resins Based on the Graft Architecture with a Flexible Main Chain for Simultaneous Enhancement of Thermal and Mechanical Toughness

Yamawake

Hayashi

Nobukawa

2022

Macro Chemistry & Physics

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Legal implications of profiling students for violence

Bailey¹

2001

Psychology in the Schools

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Predicting violent activity with a youth violence profile in schools raises a host of legal concerns focusing on the validity and use of profiles as social science evidence: the impact of potential discrimination, search and seizure, and the implications for privacy. Schools differ from airports or other settings where profiles are used. Profiles are useful if they properly establish reasonable suspicion to stop an individual. They raise more problematic constitutional issues when they support referring a student to alternative educational services. Where a profile identifies students based on race, gender, or proxies for these characteristics, it is invalid. It can also be invalid if it is not a reasonable method of achieving the government's interest in safe schools. In addition, profiles present significant problems for confidentiality. These issues rest on fundamental concerns about the general validity of profiles as scientific tools: their objectivity, accuracy, sensitivity, overinclusiveness, and general scientific acceptance. Consequently, the use of profiles in a school setting is highly problematic and controversial.

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Criminal Profiling as Expert Evidence?

Meyer

2008

Criminal Profiling

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Cited by 4 publications

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Preparation of All Amorphous PMMA Resins Based on the Graft Architecture with a Flexible Main Chain for Simultaneous Enhancement of Thermal and Mechanical Toughness

Preparation of All Amorphous PMMA Resins Based on the Graft Architecture with a Flexible Main Chain for Simultaneous Enhancement of Thermal and Mechanical Toughness

Legal implications of profiling students for violence

Criminal Profiling as Expert Evidence?

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