Citation: Yu-han Li, Mi Zhou, Cheng-zhen Geng, Feng Chen, Qiang Fu. Simultaneous Improvements of Thermal Stability and Mechanical Properties of Poly(propylene carbonate) via Incorporation of Environmental-friendly Polydopamine[J]. Chinese Journal of Polymer Science, ;2014, 32(12): 1724-1736. doi: 10.1007/s10118-014-1518-6 shu

Simultaneous Improvements of Thermal Stability and Mechanical Properties of Poly(propylene carbonate) via Incorporation of Environmental-friendly Polydopamine

1.
College of Polymer Science and Engineering, State Key Laboratory of Polymer MaterialsEngineering, Sichuan University, Chengdu 610065, China

Received Date: 15 April 2014
Revised Date: 28 May 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51173112 and 21274095).

Inspired by the photoprotection, radical scavenging of melanin together with versatile adhesive ability of mussel proteins, polydopamine (PDA) nanoparticles were successfully prepared and incorporated into environmentally friendly polymer, poly(propylene carbonate) (PPC) via solvent blending. The prepared composites exhibited excellent thermal stability in air and nitrogen atmosphere and extraordinary mechanical properties. The composites displayed eminent increase of temperature at 5% weight loss (T5%) by 30-100 K with 0.3 wt%-2.0 wt% loadings, meanwhile, the tensile strength and Young's modulus were significantly improved from 11.5 MPa and 553.7 MPa to 40.5 MPa and 2411.2 MPa, respectively. The kinetic calculation indicated that improvement of T5% is presumably derived from suppressing chain-end unzipping. The glass transition temperature (Tg) of the PPC/PDA composites increased by 8-10 K. This is probably due to hydrogen bondinginteraction since the abundant proton donors along PDA chains would interact with proton acceptors like C＝O and C―O―C in PPC which would cause restriction of segmental motion of PPC chains.
- Biodegradable polymers,
- Reinforcements,
- Mechanical properties,
- Thermal properties,
- Free radical scavenging
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沈阳化工大学材料科学与工程学院沈阳 110142