Premium
Preparation of polypropylene and polystyrene with NCO and NH 2 functional groups and their applications in polypropylene/polystyrene blends
Author(s) -
Li Hao,
Zhang XianMing,
Zhu ShiYang,
Chen WenXing,
Feng LianFang
Publication year - 2015
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.23927
Subject(s) - polypropylene , materials science , polystyrene , differential scanning calorimetry , copolymer , isocyanate , polymer blend , polymer , polymer chemistry , fourier transform infrared spectroscopy , dynamic mechanical analysis , rheology , compatibilization , grafting , chemical engineering , composite material , polyurethane , physics , engineering , thermodynamics
Isocyanate‐ and amine‐functionalized polypropylene (PP) and polystyrene (PS) were prepared through grafting and copolymerization method. These compounds are used as precursors for PP‐graft‐PS (PP‐g‐PS) copolymers and reacted at the matrix interface of PP/PS blends. Functionalized polymer structures were characterized by 1 H NMR and FTIR spectroscopy. The effects of the synthesized compatibilizer on the rheological and morphological behavior of PP/PS blends were investigated systematically. Results showed that the functional polymer was successfully synthesized, and the additional two different compatibilizer systems dramatically decreased the size of the dispersed phase domains in PP/PS blends. Compared with the uncompatibilized blends, compatibilized blends exhibited a slightly higher crystallization temperature because the melting points of the blend components were not evidently affected by the addition of compatibilizer, as revealed by differential scanning calorimetry. The compatibilizer effect on the PP/PS blends was reflected through rheological property and dynamic mechanical analysis. POLYM. ENG. SCI., 55:614–623, 2015. © 2014 Society of Plastics Engineers