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Synthesis and properties of phosphorus containing PET and PEN (I)
Author(s) -
Wang Chun Shan,
Shieh Jeng Yueh,
Sun Yih Min
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981205)70:10<1959::aid-app11>3.0.co;2-8
Subject(s) - differential scanning calorimetry , thermal stability , fire retardant , polyethylene terephthalate , char , materials science , polymer chemistry , thermogravimetric analysis , nuclear chemistry , flammability , yield (engineering) , chemistry , organic chemistry , composite material , pyrolysis , physics , thermodynamics
2‐(6‐Oxido‐6H‐dibenz 〈c,e〉〈1,2〉 oxaphosphorin‐6‐yl) dimethyl itaconate (ODOP‐DI) was prepared by the addition reaction between 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) and dimethyl itaconate while DOPO was synthesized through multistep reaction from o ‐phenylphenol and phosphorus trichloride. The compound (ODOP‐DI) was used as a reactive flame retardant in polyethylene 1,4‐terephthalate (PET) and polyethylene 2,6‐naphthalate (PEN) for film, fiber, and electronic applications. The thermal properties of the resulted copolyesters were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). Owing to the incorporation of the rigid structure of DOPO and pendant P groups, the resulted phosphorus containing copolyesters exhibited better flame retardancy, higher char yield, and thermal stability than homopolymers of PET and PEN. UL 94‐VO rating could be achieved with a phosphorus content of as low as 0.75% for PET, 0.5% for PEN, and no fume and toxic gas emission were observed. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1959–1964, 1998