[1]贾红兵,蒋琪,王经逸,等.茂金属聚乙烯增韧改性高流动性聚丙烯研究[J].南京理工大学学报(自然科学版),2012,36(05):904.
 JIA Hong-bing,JIANG Qi,WANG Jing-yi,et al.Properties of High-fluid Polypropylene Modified withMetallocene Polyethylene[J].Journal of Nanjing University of Science and Technology,2012,36(05):904.
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茂金属聚乙烯增韧改性高流动性聚丙烯研究
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
36卷
期数:
2012年05期
页码:
904
栏目:
出版日期:
2012-10-31

文章信息/Info

Title:
Properties of High-fluid Polypropylene Modified withMetallocene Polyethylene
作者:
贾红兵蒋琪王经逸房尔园蒋静
南京理工大学化工学院,江苏南京210094
Author(s):
JIA Hong-bingJIANG QiWANG Jing-yiFANG Er-yuanJIANG Jing
School of Chemical Engineering,NUST,Nanjing 210094,China
关键词:
高流动性聚丙烯茂金属聚乙烯熔融结晶温度机械性能
Keywords:
high fluid polyropylene metallocene polyethylene melting and crystallizationtemperaturemechanical property
分类号:
TQ325. 1
摘要:
为改善高流动性聚丙烯(HF-PP)的性能,采用茂金属引发剂引发乙烯-己烯茂共聚而成的茂金属聚乙烯(mEHC)对其增韧改性。通过熔融共混法制备mEHC/ HF-PP 材料,利用熔融指数测试仪、差示扫描量热仪(DSC)、扫描电子显微镜(SEM)等对改性前后的材料进行表征。结果表明,共混体系具有良好的加工性能,DSC 分析说明mEHC 的加入基本未改变HF-PP 基体的琢晶体类型,但提高了体系内聚乙烯组分的结晶温度;HF-PP 与mEHC 具有部分相容性。mEHC 大大提高了材料的冲击强度和断裂伸长率,当mEHC 质量分数为30% 时,材料的常温缺口冲击强度达到17.81 kJ/ m2。SEM 观察mEHC 颗粒均匀分散在PP 连续相表面,形成“海-岛“结构。
Abstract:
To improve the properties of the high-fluid polypropylene( HF-PP), it is modified withmetallocene ethylene-hexene copolymer(mEHC). The mEHC/ HF-PP composites are prepared throughmechanical blending and characterized by the molten index tester,the differential scanning calorimeter(DSC)and the scanning electron microscope(SEM). The results show that PP matrix has good handfulprocessability. DSC analysis indicates that the mEHC has no influence on the crystal structure of thePP matrix,but increases crystallization temperature of the PE component in the copolymer. mEHC haspartial miscibility with the HF-PP molecule. The impact strength and break elongation of HF-PP areimproved significantly. When mEHC mass content is 30%,the impact strength at room temperatureincreases to 17.81 kJ/ m2. SEM micrographs show that the sea-island structure can be observed whenmEHC elastomer particles are uniform on the PP continous phase surface.

参考文献/References:

[1]Lee S H,Kontopoulou M,Park C B. Effect of nanosilicaon the co-continuous morphology of polypropylene/polyolefin elastomer blends [ J]. Polymer, 2010, 51:1147-1155.
[2] Qian J S,He P S,Nie K M. Nonisothermal crystallizationof PP/ Nano-SiO2 composites[ J]. J Appl Polym Sci,2004,91:1013-1019.
[3] 李晨. 新型乙烯-琢-烯烃共聚弹性体及其增韧改性聚丙烯的研究[ D]. 杭州:浙江大学化学工程与生物学系,2010.
[4] Gupta P,Wilkes G L,Sukhadia A M,et al. Does thelength of the short chain branch affect the mechanicalproperties of linear low density polyethylene? Aninvestigation based on films of copolymer of ethylene/1-butene, ethylene/1-hexene and ethylene/1-octenesynthesized by a single site metallocene catalyst[ J].Polymer,2005,46:8819-8837.
[5] Liu T M,Bake W E. The effect of the length of theshort chain brach on the impact properties of linear lowdensity polyethylene[J]. Polym Eng Sci,1992,32:944-955.
[6] McNally T,McShane P,Nally G M,et al. Rheology,phase morphology, mechanical, impact and thermalproperties of polypropylene/ metallocene catalysedethylene 1-octene copolymer blends [ J]. Polymer,2002,43:3785-3793.
[7] Wang J B, Dou Q. Polypropylene/ linear low-densitypolyethylene blends: morphology, crystal structure,optical,and mechanical properties[ J]. J Appl PolymSci,2009,111:194-202.
[8] Rabiej S. The influence of side branches on thestructure of crystalline phase in ethylene-1-alkenecopolymers[ J]. European Polymer Journal,2005,41:393-402.
[9] Paul S,Kale D D. Impact modification of polypropylenecopolymer with a polyolefin elastomer [ J]. J ApplPolym Sci,2000,76(9):1480-1484.
[10] Qin J L,Guo S Q,Li Z T. Melting behavior,isothermaland nonisothermal crystallization kinetics of PP/ mLLDPEblends[J]. J Appl Polym Sci,2008,109:1515-1523.
[11] Shieh Y T,Lee M S,Chen S A. Crystallization behavior,crystal transformation,and morphology of polypropylene/polybutene-1 blends [ J]. Polymer, 2001, 42 (9): 4439-4448.
[12] Paredes B,Soares J B P,Grieken R,et al. Characterizationof ethylene-1-hexene copolymers made with supportedmetallocene catalysts: influence of support type [ J].Macromol Symp,2007,257:103-111.
[13] Kukaleva N, Cser F, Jollands M, et al. Comparison ofstructure and properties of conventional and “high-crys-tallinity冶isotactic polypropylenes and their blends withmetallocene-catalyzed linear low-density polyethylene.砖. Relationships between rheological behavior andthermal and physical properties[J]. J Appl Polym Sci,2000,77(7):1591-1599.
[14] 郭峰. PP/ POE 共混物的制备与结晶行为[ D]. 武汉:华中科技大学化学与化工学院,2006.
[15] Wu S H. Phase structure and adhesion in polymerblends:a criterion for rubber toughening[J]. Polymer,1985,26(12):1855-1863.
[16] Newman S,Strella S. Stress-strain behavior of rubberreinforced glassy polymers [ J]. J Appl Polym Sci,1965,(9):2297-2310
[17] Chen Y Z,Li H L. Effect of ultrasound on extrusion ofPP/ EPDM blends:structure and mechanical properties[J]. Polym Eng & Sci,2004,44(8):1509-1513.
[18] Zhang C H,Shangguan Y G,Chen R F,et al. Morphology,microstructure and compatibility of impact polypropylenecopolymer[J]. Polymer,2010,51:4969-4977.
[19] Chen X H,Ma G Q,Li J Q,et al. Study on morphologyevolution and fractal character of the miscible blendbetween isotactic polypropylene and copolymer ofethylene and propylene[ J]. Polymer,2009,50:3347-3360.

备注/Memo

备注/Memo:
收稿日期:2011-09-20修回日期:2012-04-08作者简介:贾红兵(1967-),女,博士,教授,主要研究方向:高分子复合材料,E-mail:jhbyrzy@ njust. edu. cn。
更新日期/Last Update: 2012-11-26