Heat distortion temperature High melt strength

TDI isomers, 210 Tear strength tests, 242-243 TEDA. See Triethylene diamine (TEDA) Telechelic oligomers, 456, 457 copolymerization of, 453-454 Telechelics, from polybutadiene, 456-459 TEM technique, 163-164 Temperature, polyamide shear modulus and, 138. See also /3-transition temperature (7)>) Brill temperature Deblocking temperatures //-transition temperature (Ty) Glass transition temperature (7) ) Heat deflection temperature (HDT) Heat distortion temperature (HDT) High-temperature entries Low-temperature entries Melting temperature (Fm) Modulu s - temperature relationship Thermal entries Tensile strength, 3, 242 TEOS. See Tetraethoxysilane (TEOS)... 

TBBA is cost effective and melt blendable in ABS, but it tends to lower the heat distortion temperature and the impact strength, as well as being vulnerable to UV. TBBA is used in epoxy polymers to make PCBs and can be converted to the bis-(2,3) dibromopropyl ether derivative, which is capable of meeting the requirements of UL-94 V-2 in high impact polystyrene and PP, despite its low bromine content. It is used in the US for wire nut connectors and in Christmas tree lights. TBBA is being subjected to assessments by various regulatory authorities. 

Polyarylsulfone (PAS) thermoplastics have relatively low melt-processing temperatures, considering their high mechanical properties. For one thing, they are hydrolytically stable. They have a heat-distortion temperature at least 204°C (400 F) at 1,820 kPa (264 psi), tensile strengths to 124 MPa (18,000 psi) or better, and a flexural modulus up to 1.17 X 10 psi. Under stress they are highly resistant to mineral acids and alkali and salt solutions. Their applications are in electrical and electronic items, frozen-food packaging, and aircraft interiors. 

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