Witness's Privilege

Bernfeld, W. K.

doi:10.1136/bmj.3.5722.590-d

BMJ

1970

DOI: 10.1136/bmj.3.5722.590-d

|View full text |Cite

Witness's Privilege

W. K. Bernfeld¹

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1994

2001

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Addition Polyimides from Non-Mutagenic Diamines

Delvigs

Klopotek

Hardy-Green

2001

High Performance Polymers

View full text Add to dashboard Cite

Abstract.Studies were conducted to find an acceptable non-mutagenic diamine to replace 4,4'-methylenedianiline (MDA), a suspect carcinogen, which is currently being used in PMR-15 polyimide applications.Several diamines containing fluorine and trifluoromethyl substituent groups were synthesized.The diamines were polymerized with the dimethyl ester of 3,3',4,4'-benzophenonetetracarboxylic acid (BTDE), using the monomethyl ester ofnadic acid (NE) as an endcap.The effect of diamine structure on rheological properties, glass transition temperature, and thermooxidative stability was investigated.Unidirectional laminates were fabricated from selected resins, using carbon fiber as the reinforcement.The results indicate that some of the diamines containing trifluoromethyl groups are non-mutagenic, and have potential to replace MDA in PMR polyimides for long-term applications at temperatures up to 300°C,

show abstract

Addition Polyimides from Non-Mutagenic Diamines

Delvigs

Klopotek

Hardy-Green

2001

High Performance Polymers

View full text Add to dashboard Cite

show abstract

Structure-property relationships in addition polyimides. I: Resins from four-ring aromatic diamines containing carbonyl and methylene groups

Delvigs

Klopotek

Cavano

1994

High Performance Polymers

View full text Add to dashboard Cite

In an effort to improve the processing characteristics of addition-type polyimide resins the use of flexibilized four-ring aromatic diamine moieties was investigated. A series of 12 diamines containing carbonyl and methylene, as well as oxo and thio bridging groups, was synthesized. The diamines were polymerized with the dimethyl ester of 3,3',4,4' benzophenonetetracarboxylic acid (BTDE). using the monomethyl ester of nadic acid (NE) as an end-cap. The effect of diamine structure on the solubility and rheological properties during cure was determined. This paper also describes the effect of diamine structure and formulated molecular weight on the glass transition temperature and thermo-oxidative stability at elevated temperatures after various post-cure regimes. The results indicate that polyimides from some of the diamines containing methylene connecting groups have potential as matrix resins for long-term applications at temperatures up to 300 C.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Witness's Privilege

Cited by 2 publications

References 0 publications

Addition Polyimides from Non-Mutagenic Diamines

Addition Polyimides from Non-Mutagenic Diamines

Structure-property relationships in addition polyimides. I: Resins from four-ring aromatic diamines containing carbonyl and methylene groups

Contact Info

Product

Resources

About