Citation: Ming-ji Wang, Guang-cui Yuan, Charles C. Han. Influences of Hyperbranched Polyethylenimine on the Reactive Compatibilization of Polycarbonate/Polyamide Blends[J]. Chinese Journal of Polymer Science, ;2015, 33(4): 652-660. doi: 10.1007/s10118-014-1475-0 shu

Influences of Hyperbranched Polyethylenimine on the Reactive Compatibilization of Polycarbonate/Polyamide Blends

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1. State Key Laboratory of Polymer Physics &
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State Key Laboratory of Polymer Physics &

Received Date: 15 August 2014
Revised Date: 12 September 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 21004069).

The influences of hyperbranched polyethylenimine (hPEI), which possesses many reactive amino end-groups, on the blending properties of bisphenol-A polycarbonate (PC) and amorphous polyamide (aPA) were systematically investigated. Scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) were used to observe the effect of hPEI on morphologies of PC and aPA phases in bulk blends. While the interfacial fracture toughness between planar PC and aPA layers with and without hPEI was studied by using augmented double cantilever beam (ADCB) method. Results show that the compatibility in PC/aPA blends can be significantly improved by adding a small amount of hPEI, mainly due to the interchange reactions between the polymers leading to the formation of block copolymers, cross-linked polymers and molecules with other constitutions. The augmented double cantilever beam experiments showed that the reactive process drastically reinforced the interfacial adhesion between planar layers of PC and aPA. However, degradation takes place during annealing at 180 ℃, which was responsible for the production of small molar mass species of PC.
- Polyamide,
- Polycarbonate,
- Polyethylenimine,
- Blend,
- Reactive compatibilization
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