牡蛎壳改性聚丙烯的研究
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摘要
针对聚丙烯(PP)冲击韧性和热稳定性差的缺点,文章采用表面改性牡蛎壳粉填充聚丙烯。实验发现庚二酸改性后的牡蛎壳粉(OSP2)对聚丙烯的改性效果最好,当OSP2的质量分数为8%时,PP的冲击强度由3.56 kJ/m~2提高到了7.19 kJ/m~2,提高了102%;热变形温度由70.4℃提高到了80.7℃,同时PP的结晶温度、速度和结晶度都有显著提高。聚丙烯的热稳定性和冲击韧性均得到了明显提高。
In view of the poor impact toughness and poor thermal stability of polypropylene, surface modified oyster shell powder was used to fill polypropylene. It was found that the effects of oyster shell powder modified by heptanic acid(OSP2)on the modification of polypropylene are the best. When the mass fraction of OSP2 was 8%, the impact strength of PP increased from 3.56 kJ/m~2 to 7.19 k J/m~2, and increased by 102%; the hot deformation temperature increased from 70.4 ℃ to80.7 ℃, while the crystallization temperature, speed and crystallinity of PP all increased significantly. The thermal stability and impact toughness of polypropylene were significantly improved.
In view of the poor impact toughness and poor thermal stability of polypropylene, surface modified oyster shell powder was used to fill polypropylene. It was found that the effects of oyster shell powder modified by heptanic acid(OSP2)on the modification of polypropylene are the best. When the mass fraction of OSP2 was 8%, the impact strength of PP increased from 3.56 kJ/m~2 to 7.19 k J/m~2, and increased by 102%; the hot deformation temperature increased from 70.4 ℃ to80.7 ℃, while the crystallization temperature, speed and crystallinity of PP all increased significantly. The thermal stability and impact toughness of polypropylene were significantly improved.
引文
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[2]Bai H,Wang Y,Song B,et al.Synergistic toughening effects of nucleating agent and ethylene-octene copolymer on polypropylene[J].Journal of Applied Polymer Science,2010,108(5):3270-3280.
[3]Tufan M,Akba?S,Yurdakul S,et al.Effects of different filler types on decay resistance and thermal,physical,and mechanical properties of recycled high-density polyethylene composites[J].Iranian Polymer Journal,2016,25(7):1-8.
[4]Garcia Garcia D,Carbonell Verdu A,JordáVilaplana A,et al.Development and characterization of green composites from bio-based polyethylene and peanut shell[J].Journal of Applied Polymer Science,2016,133(37).
[5]Yoon G L,Kim B T,Kim B O,et al.Chemical-mechanical characteristics of crushed oyster-shell[J].Waste Management,2003,23(9):825-834.
[6]李海晏,谭业强,张路,等.生物填料的制备及其对聚丙烯复合材料性能影响的研究[J].无机材料学报,2012,27(9):977-983.Li Haiyan,Tan Yeqiang,Zhang Lu,et al.Bio-filler from mussel shell:preparation and its effects on polypropylene composites properties[J].Journal of Inorganic Materials,2012,27(9):977-983.
[7]Hamester M R R,Balzer P S,Becker D.Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene[J].Materials Research,2012,15(2):204-208.
[8]Fuad M Y A.Polypropylene/calcium carbonate nanocomposites-effects of processing techniques and maleated polypropylene compatibiliser[J].Express Polymer Letters,2010,4(10):611-620.
[9]Grein C.Toughness of neat,rubber modified and filledβ-nucleated polypropylene:from fundamentals to applications[J].2005,188:43-104.
[10]Uchiyama Y,Iwasaki S,Ueoka C,et al.Molecular orientation and mechanical anisotropy of polypropylene sheet containing N,N'-dicyclohexyl-2,6-naphthalenedicarboxamide[J].Journal of Polymer Science Part B:Polymer Physics,2010,47(4):424-433.