By Sarawut Rimdusit, Chanchira Jubsilp, Sunan Tiptipakorn
This e-book presents an advent to the original and interesting houses of alloys and composites from novel commercialized thermosetting resins in accordance with polybenzoxazines. Their remarkable houses resembling processability, thermal, mechanical, electric homes in addition to ballistic influence houses of polybenzoxazine alloys and composites cause them to beautiful for varied functions in digital packaging encapsulation, mild weight ballistic armour composites and bipolar plate in gasoline cells.
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Extra resources for Alloys and Composites of Polybenzoxazines: Properties and Applications
These values are greater than that of pure polybenzoxazine (326 °C). It was reported that the glass-transition temperature determined from E00 peak of DMA results presented two values. The higher Tg was in the range of 176–185 °C, while the lower Tg was in the range of 63–72 °C. These Tg values correspond to those of poly(BA-a) and PDMS components, respectively. This behavior revealed the phase separation of the alloy in microscale. In addition, the char yield at 850 °C of the alloys increased with increasing PDMS content.
In case of higher content, the phase separation was observed. In aspect of thermal stability at lignin content of 10 wt%, the highest onset of decomposition temperature was observed. Moreover, it was reported that the char yield of the alloy film was increased with increased the lignin content. That indicates the higher flame retardancy of the alloy film than the neat polybenzoxazine. e. , because of the ability to be alloys with various kinds of resins or polymers. The property is able to broaden the range of applications of the polymer [8, 41, 42].
The residual weight or char yield of the copolymer at 800 °C was as high as ca. 61 %, much higher than that of pure poly(PBA-a). Thus, the obtained copolymer possesses high mechanical properties with excellent fire retardancy. Recently, there was an investigation on the effects of aromatic tetracarboxylic dianhydrides on the thermomechanical properties of poly(BA-a)-dianhydride copolymer . , pyromellitic dianhydride (PMDA), 3,3’,4,4’ biphenyltetracarboxylic dianhydride (s-BPDA), or 3,3’,4,4’ benzophenonetetracarboxylic BTDA.