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Mechanical and thermal analysis of injection molded poly(methyl methacrylate) modified with 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) fire retarder
Author(s) -
Krala Grzegorz,
Ubowska Agnieszka,
Kowalczyk Krzysztof
Publication year - 2014
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23644
Subject(s) - materials science , vicat softening point , melt flow index , composite material , poly(methyl methacrylate) , softening point , ultimate tensile strength , glass transition , thermal analysis , methyl methacrylate , thermal stability , flexural strength , polymer , polymerization , thermal , chemical engineering , thermodynamics , physics , engineering , copolymer
Poly(methyl methacrylate)/9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (PMMA/DOPO) compositions have been prepared by extruding and injection molding. The mechanical (i.e., tensile and flexural strengths, modulus, hardness), rheological (volume flow rate index) as well as thermal properties (Tg, Vicat softening temperature, oxygen index) of samples containing 1–10 wt parts of DOPO (per 100 wt parts of PMMA) have been analyzed. Additionally, FTIR analysis of modified PMMA has been made. The chemical reaction of both components has been observed during their processing and PMMA/DOPO compositions exhibited generally higher tensile strength, rigidity, hardness, volume flow rate index, and oxygen index. On the other hand, the addition of the mentioned phosphorous‐based component into a PMMA matrix reduced its impact strength, softening, and a glass transition temperature. Moreover, taking into consideration the thermal stability (i.e., temperature for 10 wt% mass loss in the air atmosphere) the mentioned parameter was reduced by a DOPO application as well. POLYM. ENG. SCI., 54:1030–1037, 2014. © 2013 Society of Plastics Engineers