摘要:

This paper deals with the structure and chemistry of Nafion-H, the acidic form of Nafion, which is the trade name for a perfluorinated polymer manufactured by E. I. du Pont de Nemours & Co., Inc. Nafion-H and its salts are available from Dupont in both membrane and powder forms. Nafion composites with Teflon mesh (polytetrafluoroethylene) added to give increased mechanical strength are also available. In addition, sulfonated fluorocarbons modified with other chemically active polymers have been made by Dupont and by competing companies such as Ashai Chemical Industry Co., Ashai Glass Co., Tokuyama Soda Co., and Toya Soda Co.

ISSN:1532-1797    

DOI:10.1080/07366578608081976

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The radiation chemistry of polymeric materials has been a field of extensive research. The pioneer investigations of Charlesby and Dole showed that polyolefins exposed to high energy radiation undergo various structural changes.

ISSN:1532-1797    

DOI:10.1080/07366578608081977

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Lac is the only known natural resin of animal origin. It is the secretion of a tiny insect known asKerriar lacca(formally calledLaceifer lacca).The lac-forming tiny insect grows on some types of trees, mostly abundant in tropical countries, including India. The secretion of the lac insect hardens in air and forms a covering on the body of the insect. This covering or the nest forms a continuous incrustation on the branches of the host trees. Lac is collected by scraping the incrustation from the branches of the trees.

ISSN:1532-1797    

DOI:10.1080/07366578608081978

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1532-1797    

DOI:10.1080/07366578608081975

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor