Polymer decomposition temperature

Although the prime function of plasticisers in cellulose acetate is to bring the processing temperature of the compound below the polymer decomposition temperature, it has additional values. An increase in the plasticiser content will reduce the melt viscosity at a given temperature and simplify processing. The physical properties of the finished product will be modified, increasing toughness... 

Polysiloxanes in this category typically contain cyclics of -Si(CH3)2-0- siloxane units of various sizes, or such siloxane units mixed with some carbosiloxanes (with additional -CH2- sequences) [163-165]. The cyclic portions can add considerable stiffness, resulting in isotropization temperatures above the polymers decomposition temperatures. 

Table 14.5 lists the thermal, electrical, and optical properties of perfluorinated polyimides, along with those of partially fluorinated and unfluorinated polyimides. Because of die flexible structure of the lOFEDA component, the polymer decomposition temperatures and values of perfluorinated polyimides are slightly lower than those of conventional polyimides. This coincides with the results of Hougham et al. who reported that an increase in fluorine content in... 

Polymer decomposition temperature (PDT) were determined by TGA, the rate of heating 6 C/min. 

PDT polymer decomposition temperature PETG positron emission tomography... 

On decomposition, the polybutylene terephthalate (PBT) polymers give off mainly water, carbon dioxide, butadiene, tetrahydrofuran (THF) and PBT oligomers. The flame retardants marginally increased the polymer decomposition temperature (274). 

The most recent investigations into this class of chelate polymer had as its aim the preparation of thermally stable materials. Monomeric analogs included the Cu, Ni, and Co complexes of acetylacetone-ethylenediamine which may be heated almost to redness without decomposition (4). Nevertheless, nothing exceptional in the way of thermal stability has been reported for this class of chelate polymer. Decomposition temperatures in the range of 250°-350°C are reported (55, 55). One relative order based on thermogravimetry was reported to be Ni(II) > Cd(II) > Cu(II) > Zn(II) > Co(II) > Fe(II) (56). Studies with related monomeric chelates have been described 49, 52). 

Adhesive polymers Decomposition temperature CC) Adhesive polymer Decomposition temperature CQ... 

---