Polyphenylene oxide physical

The advances in polymer blending and alloying technology have occurred through three routes (1) similar-rheology polymer pairs, (2) miscible polymers such as polyphenylene oxide and polystyrene, or (3) interpenetrating polymer networks (IPNs). All these systems were limited to specific polymer combinations that have an inherent physical affinity for each other. However with... 

Table 15.9 Thermal and Physical Properties of Polyphenylene Oxide (Typical...

For small concentrations of a given component in a polymer blend (less than 10 wt%), the resulting weak transition is typically very difficult to resolve using conventional DSC or DMTA [5,15]. Using MTDSC, Tg determinations were performed [32] on a physical blend containing four components pure PS plus PPO-30 (a PS/polyphenylene oxide (PPO) blend at a composition ratio of 70/30) plus PPO-70 (a PS/PPO blend at a composition ratio of 30/70) plus pure PPO. The amount of each component was 44.0 7.1 13.4 34.5, by weight. Figure 3.9 shows both the heat capacity and... 

Fyrolflex BDP from Akzo Nobel Chemicals has been shown to exhibit higher thermal properties and hydrolytic stability than other aryl phosphates, and to provide similar or better fire retardant performance than RDP. It is a bisphenol A bis(diphenyl phosphate) compound that provides good physical properties in formulations based on PC/ABS, HIPS and polyphenylene oxide/HIPS blends. Upon thermal decomposition of the flame-retarded polymers, phosphorus tends to accumulate in the solid residue, a result which indicates that the primary FR action of BDP is most likely to be in the condensed phase. 

Property data for GRTP s are presented in two major breakouts. In the first breakout, the basic resins—styrene acrylonitrile (SAN), polycarbonate, polysulfone, polyacetal, polypropylene, polyphenylene oxide (PPG), nylon, modified PPG, and polyvinyl chloride—are treated as the independent variables and the physical, mechanical, electrical, thermal, chemical, and weathering characteristics are treated as the dependent variables. In the second breakout, the functional relationships are reversed, te., the properties are the independent variable and the resins are the dependent variable. ASTM test methods by which the physical values were determined are listed. The. physical data versus resins are presented in both tabular and graphic form. 

TABLE 3-83. PHYSICAL AND MECHANICAL PROPERTIES OF MODIFIED POLYPHENYLENE OXIDE... 

Physical and Mechanical Properties ofModified Polyphenylene Oxide. 3-229... 

PPO (Polyphenylene oxide) - is often discovered under the trade mark "Noryl". It is an engineering polymer which has superior physical properties and temperature resistance when compared with ABS. It suffers some UV degradation but has nonetheless found widespread use in the personal computer industry. 

Polyphenylene dddes by Oxidative Polymerization of Phenols 99 Table 7.1 Physical properties of PPO [13],... 

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