摘要:

The photodegradation of plastics has been studied mainly from the practical angle, since plastics have many commercial uses. Various kinds of stabilizers, such as UV light absorbers and antioxidants, have been developed, but the mechanism of stabilization has not yet been completely clarified from the point of view of the photophysical and photochemical processes involved in polymer systems.

ISSN:0360-2559    

DOI:10.1080/03602557708055834

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Dentistry has always been dependent on the advances of science and engineering for improvement of methods and procedures. The search for desirable preventive, corrective, and restorative dental materials, because of the exacting requirements that are demanded for this application, has necessarily been restricted to a limited class of materials. Dentistry led the health science field in taking advantage of the rapidly expanding family of polymeric materials that have been developed over the years in the United States and abroad. The volume of dental resins used is insignificant compared to the total consumption of plastics. Yet, the impact of scientists working on dental problems has done much to increase the usefulness of macromolecular materials. Examples of such research are epoxy resins, which were first synthesized by Pierre Castan in the laboratories of a Swiss dental manufacturer; amine-peroxide systems specially developed to obtain rapid-curing, chemically activated dental resins which are now widely used in the cure of polyester resins; and self- curing acrylic resins which have found diverse applications as cements in orthopedic and neurosuigical techniques.

ISSN:0360-2559    

DOI:10.1080/03602557708055835

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The industry covered in this article is concerned with the copying of documents. It may be divided in two possible ways. One division is between copies made simultaneously with the original; the other is where copies are made from the original or a prepared master by an independent process. This may have some resemblances both to photography and to printing. A classification based on the method of copying follows.

ISSN:0360-2559    

DOI:10.1080/03602557708055836

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

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

ISSN:0360-2559    

DOI:10.1080/03602557708055833

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor