Heat-resistant plastics

Heat-resistant reinforced polymers are used in applications where good resistance to heat is important. Reinforced polymers meeting this requirement are listed in Table 4.4. 

---

The high thermal stability of the carbon-fluorine bond has led to considerable interest in fluorine-containing polymers as heat-resistant plastics and rubbers. The first patents, taken out by IG Farben in 1934, related to polychlorotri-fluoroethylene (PCTFE) (Figure 13.1 (a)), these materials being subsequently manufactured in Germany and the United States. PCTFE has been of limited application and it was the discovery of polytetrafluoroethylene (PTFE) (Figure... 

Excellent toughness and wear resistance. For example, the resistance to cut through of wire coverings is far superior to that of most other heat-resisting plastics. It is interesting to note that in 1994, 50% of applications of PEEK were related to the excellent wear behaviour. 

Excellent hydrolytic stability. (For example, PEK has very good resistance to hot water at 125°C, under which conditions other heat-resisting plastics such as the polyimides are liable to fail.)... 

Metallic tools should never be used in a MWO therefore, heat-resistant plastic Coplin jars or containers and heat-resistant plastic slide holders with a capacity of at least 15 sections are required for this application. MWO-medi-ated HIER can also be performed in a plastic pressure cooker designed for household kitchen application (see Subheading 3.2.), which appears to eliminate some of the drawbacks of the standard MWO protocols. 

Place the deparaffinized, rehydrated slides in metal or heat-resistant plastic slide racks and immerse in an autoclaveable incubation container filled with 250 mL HIER retrieval buffer (see Notes 2-7). Cover the container with a lid to avoid evaporation (see Note 10). 

Sekisui Plastics is reported to have developed two types of heat resistant plastics foam one is PETP foam, capable of resisting temps, of up to 220C and the other is closedcell PP foam, resistant to temps, of up to 145C. Brief details are noted. 

The salt must not be prepared in glass or porcelain vessels as HF and the aqueous solution of KF corrode glass and porcelain. Heat resistant plastic containers may be used. 

Polyalumophenylsiloxane varnish is used as a binding component in the production of heat-resistant plastics and fiberglass and as a hardener for organic and silicone polymers. 

Tetrafluoroethylene, CF2=CF2 Teflon Chemical- and heat-resistant plastics... 

They can also be made from heat resistant plastics. In placing the spacers, be sure that they do not cast a shadow onto the cells when the sun is at an angle to the panels. 

The glass cover can be a used patio door or any other piece of glass (about door size). The box is easy to construct, and can be made of wood or metal. The water trough inside the distiller can also be made of wood, metal, or heat resistant plastic. Tubing should be silicone, and reservoirs and collection bottles etc. can be plastic or glass. The inside of the box... 

Novel Heat Resistant Plastics from Hydrogenation of Styrene Polymers... 

In summary the hydrogenation of styrene-diene block polymers is a practical route to tough, clear heat-resistant plastics. Variations in overall physical properties can be obtained by controlling composition, microstructure, and the nature of the block sequence using conventional anionic polymerization techniques. 

B. producing heat-resistant plastics for use in household ovens... 

It is apparent, then, that the performance of an ablative plastic is achieved in a manner quite unlike that for heat-resistant plastics. Ablators depend upon various degradative reactions to absorb, dissipate, and block a copious amount of heat. On the contrary, heat-resistant plastics must essentially remain intact during high temperature exposure to retain a significant fraction of their room-temperature properties. 

The most promising heat-resistant plastics for hard challenges are poly-sulfones. Today, the widely used aromatic polysulfones as constmctional... 

The most promising heat-resistant plastics for hard challenges are polysulfones. 

A Food Processor s Perspective on Performance Opportunities for Heat Resistant Plastic Packaging, by Nina Goodrich, Ian Britt, and Marvin Tung, Guelph Food Technology Centre. Presented at 1995 Institute of Packaging Professionals (IDPP). 

---