Simultaneous improvements of thermal stability and mechanical properties of poly(propylene carbonate) via incorporation of environmental-friendly polydopamine
Simultaneous improvements of thermal stability and mechanical properties of poly(propylene carbonate) via incorporation of environmental-friendly polydopamine
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通过掺入环保型聚多巴胺同时提高聚碳酸亚丙酯的热稳定性和机械性能
DOI：
10.1007/s10118-014-1518-6
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发表时间：
2014-12-01
影响因子：
4.3
通讯作者：
Fu, Qiang
中科院分区：
文献类型：
--
作者：
Li, Yu-han;Zhou, Mi;Fu, Qiang
受光保护、自由基清除黑色素和贻贝蛋白质的多功能粘附能力的启发，成功制备了聚多巴胺（PDA）纳米粒子，并通过溶剂混合将其纳入环保聚合物聚碳酸丙烯酯（PPC）中。制备的复合材料在空气和氮气气氛中表现出优异的热稳定性和优异的力学性能。在0.3 wt% ~ 2.0 wt%的载荷下，复合材料在失重5% （T(5%)）下温度显著升高30 ~ 100 K，抗拉强度和杨氏模量分别从11.5 MPa和553.7 MPa显著提高到40.5 MPa和2411.2 MPa。动力学计算表明，T（5%）的改善可能源于抑制链端解压缩。PPC/PDA复合材料的玻璃化转变温度（T (g)）提高了8 ~ 10 K。这可能是由于PDA链上丰富的质子供体会与PPC中的C=O和C-O-C等质子受体相互作用，从而限制PPC链的节段运动，从而导致氢键相互作用。
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 (T (5%)) 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 T (5%) is presumably derived from suppressing chain-end unzipping. The glass transition temperature (T (g)) of the PPC/PDA composites increased by 8-10 K. This is probably due to hydrogen bonding interaction 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.