Investigation on chain structure of LLDPE obtained by ethylene in-situ copolymerization with DSC and XRD

Chinese Science Bulletin

Volumn 52, Issue 6, 2007, Pages 736-742

  Wang, YanJie ^a   Yan, WeiDong ^a  

^a HEBEI UNIVERSITY OF TECHNOLOGY   (China)

Author keywords

DSC; Ethylene and olefin copolymers; LLDPE via in situ copolymerization; Thermal segregation; XRD

Indexed keywords

EID: 34247330211     PISSN: 10016538     EISSN: 18619541     Source Type: Journal    
DOI: 10.1007/s11434-007-0093-4     Document Type: Article

References (20)

1. Halasz L, Belina K, Vorster O C, et al. Rheological, thermal and crystallisation properties of ethylene, propylene and α-olefin copolymers. II Thermal and crystallization properties. Plast Rubb Compos, 2004, 33(5): 205-211
2. Gupta P, Garth L, Beyer, et al. Does the length of the short chain branch affect the mechanical properties of linear low density polyethylenes? An investigation based on films of copolymers of ethylene/1-butene, ethylene/1-hexene and ethylene/1-octene synthesized by a single metallocene catalyst. Polymer, 2005, 46(20): 8819-8837
3. 2/MMAO catalyst system. Polymer, 2006, 47(4): 1465-1472
4. 2/MAO system. Polymer, 2000, 41(12): 4523-4530
5. Beach D L, Kissin Y V. Dual functional catalysis for ethylene polymerization to branched polyethylene, I. Evaluation of catalytic systems. J Polym Sci A: Polym Chem, 1984, 22(11): 3027-3042
6. Kissin Y V, Beach D L. Dual functional catalysis for ethylene polymerization to branched polyethylene, II. Homogeneous-heterogeneous Ziegler-Natta catalyst system. J Polym Sci A: Polym Chem, 1986, 24(6): 1069-1084
7. Denger C, Haase U, Fink G. Simultaneous oligomerization and polymerization of ethylene. Macromol Rapid Commun, 1991, 12(12): 697-701
8. Musikabhumma K, Spaniol T P, Okuda J. Synthesis of branched polyethylenes by the tandem catalysis of silica-supported linked cyclopentadienyl-amido titanium catalysts and a homogeneous Dibromo nickel catalyst having pyridylimine ligand. J Polym Sci A: Polym Chem, 2003, 41(4): 528-544
9. Barnhart R W, Bazan G C. Synthesis of branched polyolefins using a combination of homogeneous metallocene mimics. J Am Chem Soc, 1998, 120(5): 1082-1083
10. 2/MAO, Chin Sci Bull, 2001, 46(24): 2051-2053
11. Liu Z Y, Wang J, Xu D M, et al. Preparation of long-branched polyethylene by in situ poly-merization using late transition metal and metallocene catalysts, Chin Sci Bull, 2001, 46(24): 2054-2057
12. Zhu F M, Huang Y, Yang Y J, et al. Branched polyethylene prepared by in-situ copolymerization of ethylene with monotitanocene and modified methylaluminoxane catalyst. J Polym Sci A: Polym Chem, 2000, 38(23): 4258-4263
13. Quijada R, Rojas R, Bazan G, et al. Synthesis of branched polyethylene from ethylene by tandem action of iron and zirconium single site catalyst. Macromolecules, 2001, 34(8): 2411-2417
14. Galland G B, Quijada R, Rojas R, et al. NMR study of branched polyethylene obtained with combined Fe and Zr catalysts. Macromolecules, 2002, 35(2): 339-345
15. Wang H, Yan W, Jiang T, et al. Ethylene oligomerization by novel iron(II) diimine complexes / MAO. Chin Sci Bull, 2002, 47(19): 1616-1618
16. Müller A J, María L A. Thermal fraction of polymers. Prog Polym Sci, 2005, 30(5): 559-603
17. Wang Z M, He X X, Sun D Q. Applied Infrared Spectra (in Chinese). Beijng: Petrochemistry Industry Press, 1978. 371-373
18. 13Carbon. Nuclear magnetic resonance characterizations of ethylene-based polymers. JMS-Rev Macromol Chem Phys, 1989, C29(23): 201-317
19. Chen F, Robert A Shanks*, Amarasinghe G. Molecular distribution analysis of melt-crystallized ethylene copolymers. Polym Int, 2004, 53(11): 1795-1805
20. Mo Z S, Zhang H F. Structures of the Crystallization Polymer and X-ray (in Chinese). Beijing: Science Press, 2003. 228-229