MTP工艺失活催化剂在聚乳酸改性中再利用
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摘要
利用煤化工甲醇制丙烯(MTP)工艺失活催化剂(MTP-DC)对左旋聚乳酸(PLLA)填充改性,研究了其对PLLA结晶及力学性能的影响。结果表明:w(MTP-DC)为1.0%时,PLLA/MTP-DC复合材料的结晶温度达112.4℃;w(MTP-DC)为0.8%时,PLLA/MTP-DC复合材料的弯曲模量达6 682.62 MPa,较纯PLLA(5 621.67 MPa)提高1.26倍;MTP-DC的添加不会改变PLLA的晶型;一定量的MTP-DC有利于PLLA结晶,使PLLA晶体细化,成核密度增加。利用MTP-DC起到了资源节约,废物利用的目的,同时还提升了PLLA的结晶能力与一定的力学性能。
The methanol-to-propylene(MTP) deactivated catalysts(MTP-DC) from coal chemical industry were filled into poly(L-polyactic acid)(PLLA) to modify PLLA properties such as crystallization and mechanical properties. The experimental results show that the crystallization temperature of PLLA/MTCDC reaches 112.4 ℃ when the mass fraction of MTP-DC is 1.0%. The flexural modulus of PLLA/MTP-DC reaches 6 682.62 MPa, 1.26 times higher than that of pure PLLA(5 621.67 MPa) when the mass fraction of MTP-DC is 0.8%. The addition of MTP-DC doesn't change the crystalline form of PLLA. A certain amount of MTP-DC favors the crystallization of PLLA, resulting in the refinement of the PLLA crystalline and increasing nucleation density. The application of MTP-DC not only saves resources and utilizes wastes, but also enhances the crystallinity and mechanical properties of PLLA.
The methanol-to-propylene(MTP) deactivated catalysts(MTP-DC) from coal chemical industry were filled into poly(L-polyactic acid)(PLLA) to modify PLLA properties such as crystallization and mechanical properties. The experimental results show that the crystallization temperature of PLLA/MTCDC reaches 112.4 ℃ when the mass fraction of MTP-DC is 1.0%. The flexural modulus of PLLA/MTP-DC reaches 6 682.62 MPa, 1.26 times higher than that of pure PLLA(5 621.67 MPa) when the mass fraction of MTP-DC is 0.8%. The addition of MTP-DC doesn't change the crystalline form of PLLA. A certain amount of MTP-DC favors the crystallization of PLLA, resulting in the refinement of the PLLA crystalline and increasing nucleation density. The application of MTP-DC not only saves resources and utilizes wastes, but also enhances the crystallinity and mechanical properties of PLLA.
引文
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[3]周凯,顾书英,邹存洋.碳酸钙填充聚乳酸复合材料的制备和性能研究[J].中国塑料,2009,23(6):27-30.
[4]庄韦,王菊花,纪清林,等.碳纳米管/聚乳酸复合材料的制备与性能[J].机械工程材料,2012,36(1):37-40.
[5]高姣,郭晔,徐建荣,等.分子筛改性可降解材料聚乳酸的研究[J].化学工程师,2010,24(5):14-16.
[6]Shen Zhiyuan,Luo Faliang,Xing Qian,et al.Effect of an aryl amide derivative on the crystallization behaviour and impact toughness of polyethylene terephthalate[J].Cryst Eng Comm,2016,18(12):2135-2143.
[7]Wang Diran,Luo Faliang,Shen Zhiyuan,et al.A study on the crystallization behavior and mechanical properties of poly(ethylene terephthalate)induced by chemical degradation nucleation[J].RSC Adv,2017,7(59):37139-37147.
[8]袁华,丁峰,葛芳芳.碳酸钙高填充聚乳酸复合材料的制备及性能[J].塑料,2011,40(4):40-43.
[9]Yasuniwa M,Tsubakihara S,Sugimoto Y,et al.Thermal analysis of the double-melting behavior of poly(L-Lactic acid)[J].J Polym Sci Part B:Polym Phys,2004,42(1):25-32.
[10]Lorenzo M L D.Calorimetric analysis of the multiple melting behavior of poly(L-lactic acid)[J].J Appl Polym Sci,2010,100(4):3145-3151.
[11]Zhang Jianming,Kohji Tashiro,Hideto Tsuji,et al.Disorderto-order phase transition and multiple melting behavior of poly(L-lactide)investigated by simultaneous measurements of WAXD and DSC[J].Macromolecules,2008,41(4):1352-1357.
[12]张晓静,贾天刚,方少明,等.笼形氯化氨丙基聚倍半硅氧烷/聚乳酸杂化材料的冷结晶及熔融行为[J].高分子材料科学与工程,2010,26(3):75-78.
[13]司朋飞.氢键作用对脂肪族聚酯结晶行为的影响[D].银川:宁夏大学,2016.
[14]Jiang Long,Zhang Jinwen,Michael P,et al.Comparison of polylactide/nano-sized calcium carbonate and polylactid/montmorillonite composites:reinforcing effects and toughening mechanisms[J].Polymer,2007,48(26):7632-7644.