摘要:

The photooxidation of polymers is of considerable practical significance since the rate of this process controls the useful service life of most polymers in outdoor applications. Low-density polyethylene in the form of film remains essentially unchanged for many years when stored at ambient temperatures indoors in the absence of direct sunlight. Out-of-doors, by contrast, even when stabilized with the most effective commercial UV stabilizers at present

ISSN:0360-2559    

DOI:10.1080/03602557808067653

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This review addresses itself only to the significant glass fiber reinforced thermoplastic developments (GRTP's) during the period 1966–1975.

ISSN:0360-2559    

DOI:10.1080/03602557808067654

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Fluorocarbon elastomers were first introduced in the mid-1950s. During the past 20 years they have found wide use in a variety of applications and have established themselves as an important class of elastomers. Their success and continued growth as high performance materials is a result of their unique balance of physical properties. As a class, they are superior to most other types of elastomers in resistance to degradation at elevated temperatures and resistance to swelling in a wide variety of fluids. This superiority is evident in the ASTM D-2000 classification system where fluorocarbon elastomers normally carry the designation HK for type and class. This system specifies that fluorocarbon elastomers shall be tested for 70 hr at 482°F for resistance to degradation in hot air (the H term) and for 70 hr at 302° F (maximum allowable temperature for the fluid) in ASTM No. 3 oil for fluids resistance (the K term). Under these conditions, heat aged properties must not change more than that indicated in Table 1 while volume increase in the specified oil must not exceed 10%. These test requirements are the most severe of any elastomer described in this ASTM classification system.

ISSN:0360-2559    

DOI:10.1080/03602557808067655

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Polyvinyl chloride (PVC) is the most adaptable synthetic polymer. Starting with the base polymer that is heat and UV light sensitive and relatively brittle, compounders can produce articles ranging from soft (“soggy”) fishing lures to hard, rigid, high impact building materials. This tremendously wide spectrum of products is made possible through the addition of stabilizers, lubricants, plasticizers, and polymeric modifiers.

ISSN:0360-2559    

DOI:10.1080/03602557808067656

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The science and technology of organotin polymers are based on the properties of organotin compounds which have surprisingly diverse applications, including use as stabilizers for vinyl chloride and other olefm polymers, as industrial catalysts, as industrial and agricultural biocides, and as antifouling and wood-preserving agents. In keeping with the expanding use of organotin compounds, the worldwide production of organotin compounds has risen dramatically from less than 50 tons/yr in 1950 to over 25,000 tonslyr in 1975 [1]. The chemis-try of organotin compounds, including the preparative methods, properties, chemical reactions, and uses, has been reviewed in several recent monographs and symposia proceedings [1–5]

ISSN:0360-2559    

DOI:10.1080/03602557808067657

出版商:Taylor & Francis Group    

年代:1978

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:10.1080/03602557808067652

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor