ie504032w_si_001.pdf (630.3 kB)
PBT/PC Blends Compatibilized and Toughened via Copolymers in Situ Formed by MgO-Catalyzed Transesterification
journal contribution
posted on 2015-02-04, 00:00 authored by Gong-Peng Lin, Ling Lin, Xiu-Li Wang, Li Chen, Yu-Zhong WangDue to the limited toughening effect
of BPM520 (a commercial acrylic-based
core–shell structure impact modifier) on poly(butylene terephthalate)
(PBT)/polycarbonate (PC) blends, magnesium oxide (MgO) was used as
a transesterification catalyst, and BPM520 as a toughening agent to
prepare PBT/PC blends by extrusion and injection molding. The structures
and comprehensive properties of PBT/PC blends were investigated. Results
of thermogravimetric analysis, Fourier transform infrared analysis,
differential scanning calorimetry, and rheological measurements showed
that transesterification reactions occurred among PBT, PC, and BPM520.
As a result, the impact property of the blends was improved significantly,
and only 5 wt % of BPM520 was needed to make the PBT/PC blend possess
excellent toughness in the presence of MgO, which suggested a very
efficient toughening approach for PBT/PC blends.