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混合助催化剂对丙烯本体聚合的影响 被引量:1

Influnences of mixed cocatalyst on propylene bulk polymerization
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摘要 分别采用DQ型和BC-MS型Ziegler-Natta催化剂催化丙烯本体聚合,助催化剂为三乙基铝(TEAL)与三异丁基铝(TiBA)的混合物,外给电子体为二苯基二甲氧基硅烷,氢气作相对分子质量调节剂,反应釜内的装料系数为70%。首先在20℃条件下进行预聚合,预聚合结束后迅速升温至70℃聚合。研究了TEAL/TiBA混合助催化剂对聚丙烯(PP)等规指数、熔体流动速率(MFR)和力学性能的影响。结果表明:随着助催化剂中TiBA用量的增加,所制PP的等规指数降低,MFR呈降低趋势。与BC-MS型催化剂相比,用DQ型催化剂制备的PP的弯曲强度和弯曲模量总体上较低,简支梁缺口冲击强度相对较高。 In this paper, two kinds of commercialized Ziegler-Natta catalysts, namely DQ catalyst and BC-MS catalyst, were used to catalyze propylene bulk polymerization with triethylaluminum(TEAL) and triisobutylal-uminium (TiBA) mixtures as cocatalysts, diphenyldimethoxysilane as an external donor and hydrogen as a relative molecular mass regulator, and the charge coefficient of the autoclave was 70%. The prepolymerization of propylene was carried out at 20 ℃,and the temperature was rapidly elevated to 70 ℃ after prepolymerization. The effects of TEAL/TiBA mixed cocatalyst on isotacticity, melt flow rate(MFR) and mechanical properties of the resultant polypropylene(PP) were studied. The results indicate that both the isotacticity and the MFR of the PP tend to decrease as the amount of TiBA in TEAL/TiBA mixed cocatalyst increases. Compared with BC-MS catalyst, the PP prepared with DQ catalyst has lower flexural strength and flexural modulus but higher charpy notched impact strength.
出处 《合成树脂及塑料》 CAS 北大核心 2014年第5期6-9,共4页 China Synthetic Resin and Plastics
基金 国家重点基础研究发展规划项目(2011CB606001) 浙江省公益技术研究工业项目(2012C21056)
关键词 聚丙烯 齐格勒-纳塔催化剂 本体聚合 等规指数 熔体流动速率 polypropylene Ziegler-Natta catalyst bulk polymerization isotacticity melt flow rate
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参考文献16

  • 1胡徐腾,李振宇,牛慧,董金勇.聚丙烯釜内合金技术的研究进展[J].石油化工,2006,35(5):405-410. 被引量:27
  • 2Galli P, Vecellio G. Techno|ogy: driving force behind innova- tion and growth of polyolefins[J]. Prog Polym Sci, 200 I, 26 (8) : 1287-1336.
  • 3Fu Zhisheng, Tu Songtao, Fan Zhiqiang. Effect of the combined external electron donors on the structure and properties of polypropylene/pofy (ethylene-cO-propylene) in-reactor alloys prepared by high-efficiency industrial Ziegler-Natta catalyst[J]. Ind Eng Chem Res, 2013, 52 (17) : 5887-5894.
  • 4Tu Songtao, Fu Zhisheng, Fan Zhiqiang. Influence of coeatalyst on the structure and properties of polypropylene/poly (ethylene- co-propylene) in-reactor alloys prepared by MgClz/TiC14/ diester type Ziegler-Natta catalyst[J]. J Appl Polym Sci, 2012, 124(6) : 5154-5164.
  • 5Dong Qi, Wang Xiaofeng, Fu Zhisheng, et al. Regulation of morphology and mechanical properties of polypropylene/poly (ethylene-co-propylene) in-reactor alloys by multi-stage sequential polymerization[J]. Polymer, 2007, 48 (20) : 5905- 5916.
  • 6Fu Zhisheng, Zhang Yanzhong, Fan Zhiqiang, et al. Structure and morphology of polyethylene/polypropylene in-reactor alloys synthesized by spherical high-yield Ziegler-Natta catalyst[J]. J Appl Polym Sci, 2007, 103 (4) : 2075-2085.
  • 7Fan Zhiqiang, Deng Jian, Zuo Yanmei, et al. Influence of co- polymerization conditions on the structure and properties of polyethylene/polypropylene/poly ( ethylene-co-propylene ) in- reactor alloys synthesized in gas-phase with spherical Ziegler- Natta catalyst[J]. J Appl Polym Sci, 2006, 102 (3) : 2481-2487.
  • 8Fu Zhisheng, Dong Qi, Li Na, et al. Influence of polymerization conditions on the :tructure and properties of polyethylene/ polypropylene in-reactor alloy synthesized in the gas phase with a spherical Ziegl :r-Natta catalyst[J]. J App! Polym Sci, 2006, 101 (4) : 2136-2143.
  • 9van der Wal A, Mul&r J J, Oderkerk J, et al. Polypropylene- rubber blends: 1. The effect of the matrix properties on the impact behaviour[J]. Polymer, 1998, 39 (26) : 6781-6787.
  • 10van der Wal A, Muld r J J, Thijs H A, et al. Fracture of poly- propylene: 1. The effect of molecular weight and temperature at low and high test speec[J]. Polymer, 1998, 39 (22) : 5467-5475.

二级参考文献18

  • 1于鲁强.反应器聚烯烃合金技术的进展[J].石油化工,2004,33(8):777-780. 被引量:12
  • 2Galli P,Vecellio G. Technology: Driving Force Behind Innovation and Growth of Polyolefins. Prog Polym Sci,2001,26:1 287 - 1 336
  • 3Montedison SPA. Polypropylene Compositions Having Improved Impact Strength Properties at Low Temperatures and Process for Preparing Same. US Pat Appl,US 4521566. 1985
  • 4Kittilsen p, Mckenna T F. Study of the Kinetics, Mass Transfer, and Particle Morphology in the Production of High-Impact Polypro-pylene. J Appl Polym Sci,2001,82 : 1 047 - 1 060
  • 5Asahi Chemical Ind, Impact Resistant Polymer Compositions. US Pat Appl,US 3627852. 1971
  • 6Randall J C. Sequence Distributions Versus Catalyst Site Behavior of in Situ Blends of Polypropylene and Poly (Ethylene-co-Propylene). J Polym Sci Part A :Polym Chem, 1998,36 : 1 527 - 1 542
  • 7Sun Zhenhua, Yu Fusheng, Qi Yuchen. Characterization, Morphology and Thermal Properties of Ethylene-Propylene Block Copolymers. Polymer, 1991,32 : 1 059 - 1 064
  • 8Francis M, Mirabellar J. Impact Polypropylene Copolymers: Fractionation and Structural Characterization: Polymer, 1993, 34:1 729 - 1 735
  • 9Cai Hongjun, Luo Xiaolie, Ma Dezhu. Structure and Properties of Impact Copolymer Polypropylene Ⅰ, Chain Structure, J Appl Polym Sci, 1999,71:93 - 101
  • 10Cai Hongjun, Luo Xiaolie, Ma Dezhu. Structure and Properties of Impact Copolymer Polypropylene Ⅱ. Phase Structure and Crystalline Morphology. J Appl Polym Sci, 1999,71 : 103 - 113

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