聚(3-羟基丁酸-co-3-羟基戊酸共聚酯)/聚丙烯接枝马来酸酐的制备及其性能
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摘要
为获得高质量的聚(3-羟基丁酸-co-3-羟基戊酸共聚酯)/聚丙烯接枝马来酸酐(PHBV/PP-g-MAH)双组分材料,利用正交试验,采用不同熔融共混工艺参数制备了9种质量比为50∶50的PHBV/PP-g-MAH共混材料,优化正交工艺并研究其对共混材料的机械性能、相形态、结晶性能和热稳定性的影响.结果表明:PHBV/PP-g-MAH材料的优化共混工艺为共混温度180℃,螺杆转速40r/min,共混时间3min;在优化后的共混工艺条件下,PP-g-MAH分散相的数量平均半径和体积平均半径最小,分别为8.6μm和9.4μm,与力学性能分析结果吻合;在不同共混工艺参数下,PHBV/PP-g-MAH材料呈现不同的"海-岛"相分布,PHBV呈现不同的结晶度;当降温速率增大时,共混体系各组分结晶峰变宽,结晶温度减小,共混体系中PHBV的结晶温度明显提高;共混体系中PHBV的起始热分解温度达到了250℃,其热稳定性得到明显改善.
In order to obtain a high quality two-component material of Poly( 3-hydroxybutyrate-co-3-hydroxyvalerate)( PHBV) and polypropylene grafting maleicanhydride( PP-g-MAH) by using the orthogonal experiment design,nine different PHBV / PP-g-MAH blends were prepared with a ratio of 50 ∶ 50 by melting mixing.The parameters of blending process,mechanical property,phase morphology,crystallization property and thermal property were investigated by the optimal blending process. The results indicate that the optimal blending process is temperature 180 ℃,screw speed 40 r / min and time limit 3 min. The number of the dispersed phase average radius and the volume average radius is a minimum of 8. 6 μm and 9. 4 μm,respectively,on the condition of optimizing blending process,which accords with the results of mechanical properties.PHBV / PP-g-MAH blends with different morphology of sea-island and the crystallization of PHBV varies from blending process parameters to another.When the cooling velocity increases,the crystallization peak becomes wider and the temperature of crystallization decreases,but the crystallization temperature of PHBV increases significantly. The initial thermal decomposition temperature of PHBV in blending system reaches over 250 ℃,that is to say,the thermal stability of PHBV is markedly improved.
In order to obtain a high quality two-component material of Poly( 3-hydroxybutyrate-co-3-hydroxyvalerate)( PHBV) and polypropylene grafting maleicanhydride( PP-g-MAH) by using the orthogonal experiment design,nine different PHBV / PP-g-MAH blends were prepared with a ratio of 50 ∶ 50 by melting mixing.The parameters of blending process,mechanical property,phase morphology,crystallization property and thermal property were investigated by the optimal blending process. The results indicate that the optimal blending process is temperature 180 ℃,screw speed 40 r / min and time limit 3 min. The number of the dispersed phase average radius and the volume average radius is a minimum of 8. 6 μm and 9. 4 μm,respectively,on the condition of optimizing blending process,which accords with the results of mechanical properties.PHBV / PP-g-MAH blends with different morphology of sea-island and the crystallization of PHBV varies from blending process parameters to another.When the cooling velocity increases,the crystallization peak becomes wider and the temperature of crystallization decreases,but the crystallization temperature of PHBV increases significantly. The initial thermal decomposition temperature of PHBV in blending system reaches over 250 ℃,that is to say,the thermal stability of PHBV is markedly improved.
引文
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[2]赵春财,王华平,沈健彧,等.PLA和PHBV共混改性聚酯长丝及其制备方法:201210350463.1[P].2012-09-20.
[3]陈鹏,顾群,黎俊,等.一种含PHBV的可降解纤维及其制备方法:201110102009.X[P].2012-05-30.
[4]AVELLA M,MARTUSCELLI E,RAIMO M.Review properties of blends and composites based on poly(3-hydroxy)butyrate(PHB)and poly(3-hydroxybutyrate-hydroxyvalerate)(PHBV)copolymers[J].Journal of Materials Science,2000,35(3):523-545.
[5]CHEN L,XU J,QIN Z Y.Crystallization and mechanical properties of Poly(3-hydroxybutyrate-hydroxyvalerate)/Polypropylene[J].Materials Research Innovations,2014(18):848-853.
[6]陈龙,徐珺,秦宗益.一种增韧生物质材料及其制备方法:201310141212.7[P].2013-07-17.
[7]张彪,胡更生,梁多平,等.聚乳酸/聚(3-羟基丁酸酯-co-4-羟基丁酸酯)/改性高岭土纳米复合材料的结晶、动态力学及流变行为[J].高校化学工程学报,2013,27(3):513-518.
[8]LEI Y,WU Q,ZHANG Q.Morphology and properties of microfibrillar composites based on recycled poly(ethylene terephthalate)and high density polyethylene[J].Composites Part A:Applied Science and Manufacturing,2009,40(6):904-912.
[9]SASIKALA C,RAMANA C V.Biodegradable polyesters[J].Advances in Applied Microbiology,1996(42):97-218.
[10]吴丽珍,翁云宣.PHBV/PBS共混物的性能研究[J].塑料工业,2011,39(10):91-92.
[11]LIU P,CHEN L,XU J,et al.Mechanical Properties of Poly(3-hydrobutyrate-co-hydroxyvalerate)/Biodegradable Hyperbranched Poly(esteramide)Blends[J].Materials Science Forum,2013,745:436-441.
[12]朱斐超,于斌,韩建,等.熔喷非织造用PHBV/PLA共混体系的结构与相容性[J].高分子材料与工程,2014,30(8):81-84,90.
[13]龚长华,孙辉,盛京.双组分共混体系中晶相结晶行为[J].高分子通报,2006(7):71-76,81.
[14]MARCILLA A,GARCIA-QUESADA J,GIL E.Behavior of flexible poly(vinyl chloride)/poly(hydroxybutyrate valerate)blends[J].Journal of Applied Polymer Science,2008,110(4):2102-2107.