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Journal articles on the topic 'Polypropene'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Rotzinger, Bruno, and Martin Brunner. "In-reactor stabilization of polypropene." Polymer Degradation and Stability 93, no. 1 (January 2008): 316–20. http://dx.doi.org/10.1016/j.polymdegradstab.2007.09.008.

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2

Mori, Hideharu, Tomoyuki Hatanaka, and Minoru Terano. "Thermal stability of syndiotactic polypropene." Macromolecular Rapid Communications 18, no. 2 (February 1997): 157–61. http://dx.doi.org/10.1002/marc.1997.030180213.

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3

Tampier, Monika, and Gundolf Trafara. "Melting of isotactic polypropene in blends with atactic polypropene and isotactic poly(1-ethylethylene)." Makromolekulare Chemie. Macromolecular Symposia 52, no. 1 (December 1991): 247–52. http://dx.doi.org/10.1002/masy.19910520123.

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4

Shiono, Takeshi, Yoshihide Akino, and Kazuo Soga. "Synthesis of Isotactic Polypropene-block-Poly(methyl methacrylate) Using Magnesium Bromide-Terminated Isotactic Polypropene." Macromolecules 27, no. 21 (October 1994): 6229–31. http://dx.doi.org/10.1021/ma00099a046.

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5

Kaminsky, Walter, and Katharina Wiemann. "Polypropene nanocomposites by metallocene/MAO catalysts." Composite Interfaces 13, no. 4-6 (January 2006): 365–75. http://dx.doi.org/10.1163/156855406777408557.

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6

Dietrich, Ulf, Martijn Hackmann, and Bernhard Rieger. "A New Class of Thermoplastic Elastic Polypropenes Prepared with a High Activity “Dual-Side” Zirconocene Catalyst." Rubber Chemistry and Technology 73, no. 5 (November 1, 2000): 839–46. http://dx.doi.org/10.5254/1.3547623.

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Abstract It is well known that the mechanical properties of highly isotactic polypropene depend on the crystalline structure of the material. Up to now, the polymer properties were modified by varying either the processing conditions—e.g., extrusion, annealing etc.—or the composition—e.g., blending, nucleation. Highly active ethylene bridged C1-symmetric zirconocene catalysts can be used to design the material properties by varying the crystallinity of thermoplastic (elastic) polypropenes. With the new unsymmetric catalyst rac−dichloro[1−(9−fluorenyl)−2−(R,S)−(5,6−cyclopenta−2−methylinden−1−η5−yl)ethane]zirconium (IV)/MAO (1) polypropenes of variable isotacticities are accessible. The variable and thus defined use of two different sides of the catalytically active species allows the placement of single, cumulated and consecutive [rr]-triads within an isotactic polymer chain. The formation of these stereoerrors is adjusted in an arbitrary manner by the polymerization conditions temperature and monomer concentration. The mechanical properties of polypropenes produced with 1/MAO vary from tough thermoplastic to excellent elastic. Stress—strain behavior of these physically crosslinked elastomers can be designed similar to the ones of polyisoprene or partly crosslinked natural rubber.

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7

Feller, J. F., A. Guyot, R. Spitz, B. Chabert, and J. F. Gerard. "Coupling agents for polypropylene/glass fiber composites: synthesis of functionalized isotactic polypropene and crystallization." Composite Interfaces 3, no. 2 (January 1995): 121–34. http://dx.doi.org/10.1163/156855495x00039.

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8

Ying, Zong Rong, Zhi Min Dang, Xiao Hui Yan, Xiu Ouyang, and Yan Ying Gao. "Crystallization Properties of Polypropene/Graphene Oxide Nanocomposites." Advanced Materials Research 335-336 (September 2011): 347–50. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.347.

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Polypropene (PP)/graphite oxide (GO) nanocomposite was prepared via solution blending and studied by adopting polarized optical microscopy observations, X-ray diffraction analysis and differential scanning calorimetry analysis. It is found that GO acts as an effective heterogeneous nucleation agent. The addition of GO doesn’t change the crystalline structure of PP, but leads to the decrease of spherulite dimension. GO makes the temperature of the crystallization exothermic peak increase, the crystallization temperature range and the half width of the crystallization peak narrow.

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9

Cecchin, Giuliano, Giampiero Morini, and Anteo Pelliconi. "Polypropene product innovation by reactor granule technology." Macromolecular Symposia 173, no. 1 (August 2001): 195–210. http://dx.doi.org/10.1002/1521-3900(200108)173:1<195::aid-masy195>3.0.co;2-a.

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10

Zhang, Qi-jin, Jun Wen, Xiao-lie Luo, and Zhi-yong Wang. "Synthesis of polypropene-graft-poly(ɛ-caprolactone)." Macromolecular Chemistry and Physics 196, no. 4 (April 1995): 1221–28. http://dx.doi.org/10.1002/macp.1995.021960421.

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11

Dindyal, Shiva, and Jayant Sharad Vaidya. "Novel use of Prolene suture for duct delineation during microductectomy." Surgical Techniques Development 1, no. 1 (August 31, 2011): 11. http://dx.doi.org/10.4081/std.2011.e11.

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Classically, microductectomy is performed using a probe inserted via the offending duct to delineate and identify the responsible duct. We propose the use of a 1-0 Prolene (Polypropene blue monofilament nonabsorbable) suture to cannulate the relevant duct.

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12

Lie, B., and J. G. Balchen. "Robustness of Nonlinear Decoupling in a Polypropene Reactor." IFAC Proceedings Volumes 22, no. 8 (August 1989): 17–22. http://dx.doi.org/10.1016/s1474-6670(17)53333-9.

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13

Park, Joon Ryeo, Takeshi Shiono, and Kazuo Soga. "Regioirregular polypropene prepared with silica-supported titanium catalysts." Macromolecules 25, no. 2 (March 1992): 521–24. http://dx.doi.org/10.1021/ma00028a004.

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14

Kaya, Atila, Lothar Jakisch, Hartmut Komber, Gisela Pompe, Jürgen Pionteck, Brigitte Voit, and Ulrich Schulze. "Synthesis of oxazoline functionalized polypropene using metallocene catalysts." Macromolecular Rapid Communications 21, no. 17 (November 1, 2000): 1267–71. http://dx.doi.org/10.1002/1521-3927(20001101)21:17<1267::aid-marc1267>3.0.co;2-9.

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15

Mülhaupt, Rolf, Thomas Duschek, David Fischer, and Stefan Setz. "Novel polypropene materials derived from vinylidene-terminated oligopropenes." Polymers for Advanced Technologies 4, no. 7 (August 1993): 439–49. http://dx.doi.org/10.1002/pat.1993.220040707.

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16

Harney, Matthew B., Yonghui Zhang, and Lawrence R. Sita. "Bimolecular Control over Polypropene Stereochemical Microstructure in a Well-Defined Two-State System and a New Fundamental Form: Stereogradient Polypropene." Angewandte Chemie International Edition 45, no. 37 (September 18, 2006): 6140–44. http://dx.doi.org/10.1002/anie.200601616.

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17

Harney, Matthew B., Yonghui Zhang, and Lawrence R. Sita. "Bimolecular Control over Polypropene Stereochemical Microstructure in a Well-Defined Two-State System and a New Fundamental Form: Stereogradient Polypropene." Angewandte Chemie 118, no. 37 (September 18, 2006): 6286–90. http://dx.doi.org/10.1002/ange.200601616.

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18

Hopf, Andreas, and Walter Kaminsky. "Highly syndiotactic polypropene with Cs-symmetric metallocene/MAO catalysts." Catalysis Communications 3, no. 10 (October 2002): 459–64. http://dx.doi.org/10.1016/s1566-7367(02)00176-0.

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19

Kaminsky, Walter, Andreas Hopf, and Christian Piel. "Cs-symmetric hafnocene complexes for synthesis of syndiotactic polypropene." Journal of Organometallic Chemistry 684, no. 1-2 (November 2003): 200–205. http://dx.doi.org/10.1016/s0022-328x(03)00731-9.

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20

Kawamoto, Naoshi, Hideharu Mori, Koh-hei Nitta, Nobuhiko Yui, and Minoru Terano. "Crystalline structure at surfaces of uniaxially drawn polypropene films." Die Angewandte Makromolekulare Chemie 256, no. 1 (April 1, 1998): 69–74. http://dx.doi.org/10.1002/(sici)1522-9505(19980401)256:1<69::aid-apmc69>3.0.co;2-m.

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21

Ruhl, Oliver, Gerhard Luft, Patrick Brant, and John Richard Shutt. "Phase Behaviour of the System Propene/Polypropene at High Pressure." Journal of Thermodynamics 2011 (November 2, 2011): 1–5. http://dx.doi.org/10.1155/2011/282354.

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The phase behaviour of mixtures of supercritical propene and a number of polypropenes, which have a similar density but significantly different molecular weights and tacticities, was investigated in a broad range of polymer weight fractions and temperatures at high pressures. The cloud-point pressures were measured optically, using a view cell which was equipped with two windows made of synthetic sapphire and a metal bellows to accurately adjust the pressure. The cloud-point pressures were found in the range from 29 to 37 MPa decreasing with increasing polymer weight fraction and increasing with increasing temperature and polymer molecular weight. The critical weight fraction was found below 2 to 6 wt.-%. Whereas the cloud-point pressures of atactic and syndiotactic samples were high and very similar, the isotactic species exhibit distinctly lower values. The results, extrapolated to lower temperatures, show good agreement with the literature data.

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22

Bezerédi, Ákos, Zoltán Demjén, and Béla Pukánszky. "Fracture resistance of particulate filled polypropene. Effect of surface treatment." Die Angewandte Makromolekulare Chemie 256, no. 1 (April 1, 1998): 61–68. http://dx.doi.org/10.1002/(sici)1522-9505(19980401)256:1<61::aid-apmc61>3.0.co;2-x.

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23

Kukral, Jürgen, and Bernhard Rieger. "High molecular weight polypropene elastomers via“dual-side” zirconocene dichlorides." Macromolecular Symposia 177, no. 1 (January 2002): 71–86. http://dx.doi.org/10.1002/1521-3900(200201)177:1<71::aid-masy71>3.0.co;2-2.

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24

Mori, Hideharu, Kouki Ohnishi, and Minoru Terano. "Ethene polymerization with modified-polypropene-supported highly stable Ziegler catalyst." Macromolecular Rapid Communications 17, no. 1 (January 1996): 25–29. http://dx.doi.org/10.1002/marc.1996.030170104.

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25

Deng, Hai, Hans Winkelbach, Kazuyoshi Taeji, Walter Kaminsky, and Kazuo Soga. "Synthesis of High-Melting, Isotactic Polypropene withC2- andC1-Symmetrical Zirconocenes." Macromolecules 29, no. 20 (January 1996): 6371–76. http://dx.doi.org/10.1021/ma960241k.

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26

Stadler, Florian J., Burçak Arikan, Joachim Kaschta, and Walter Kaminsky. "Long-Chain Branches in Syndiotactic Polypropene Induced by Vinyl Chloride." Macromolecular Chemistry and Physics 211, no. 13 (May 11, 2010): 1472–81. http://dx.doi.org/10.1002/macp.200900688.

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27

Staal, Oetze K. B., Dirk J. Beetstra, Andries P. Jekel, Bart Hessen, Jan H. Teuben, Petr Štěpnička, Róbert Gyepes, Michal Horáček, Jiří Pinkas, and Karel Mach. "Polymerization of Propene with Modified Constrained Geometry Complexes. Double-Bond Isomerization in Pendant Alkenyl Groups Attached to Cyclopentadienyl Ligands." Collection of Czechoslovak Chemical Communications 68, no. 6 (2003): 1119–30. http://dx.doi.org/10.1135/cccc20031119.

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Polymerization of propene with dimethylsilylene-bridged (amidocyclopentadienyl)dichlorotitanium(IV) complexes [TiCl2{η5-1-(t-BuSiMe2N-κN)-2,3,4-Me3-5-R-C5}], where R = Me (1), H (2), Ph (3), 4-fluorophenyl (4), but-2-en-2-yl (5), and butyl (6), combined with excess methylaluminoxane revealed a moderate effect of the substituent R on the catalyst activity and the molecular weight of polypropene. The asymmetric substitution in the position adjacent to the bridging carbon atom resulted in polymer yields decreasing in the order 1 > 6 > 3 ≈ 5 > 4 > 2 while polymers with the molecular weights (Mw) close to 2.5 × 105 for 1, 3, and 4, 1.5 × 105 for 5 and 6, and 7.5 × 104 for 2 were obtained. The 13C NMR analysis of the polymers has shown that atactic polypropene is slightly enriched with syndiotactic triads for all the catalysts. Investigation of the crystal structure of 5 by X-ray crystallography revealed that the double bond in but-3-en-2-yl had shifted to an internal position to give the isomeric, but-2-en-2-yl-substituted complex. Likewise, the spectroscopic data for complex 7 prepared from the ligand containing but-3-en-1-yl substituent, indicate the absence of terminal double bond.

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28

Lie, Bernt, and Jens G. Balchen. "A Comparison of Strategies for the Control of a Polypropene Reactor." Modeling, Identification and Control: A Norwegian Research Bulletin 14, no. 3 (1993): 121–31. http://dx.doi.org/10.4173/mic.1993.3.1.

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29

Lie, B., and J. G. Balchen. "A Comparison of Strategies for the Control of a Polypropene Reactor." IFAC Proceedings Volumes 25, no. 5 (April 1992): 179–84. http://dx.doi.org/10.1016/s1474-6670(17)50989-1.

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30

Stricker, F., R. D. Maier, M. Bruch, R. Thomann, and R. Mülhaupt. "Influence of glass bead fillers on phase transitions of syndiotactic polypropene." Polymer 40, no. 8 (April 1999): 2077–84. http://dx.doi.org/10.1016/s0032-3861(98)00247-x.

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31

Kishimoto, Y., and R. Ishii. "Differential scanning calorimetry of isotactic polypropene at high CO 2 pressures." Polymer 41, no. 9 (April 2000): 3483–85. http://dx.doi.org/10.1016/s0032-3861(99)00698-9.

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32

Kawamoto, Naoshi, Hideharu Mori, Koh-hei Nitta, Shintaro Sasaki, Nobuhiko Yui, and Minoru Terano. "Microstructural characterization of polypropene surfaces using grazing incidence X-ray diffraction." Macromolecular Chemistry and Physics 199, no. 2 (February 1, 1998): 261–66. http://dx.doi.org/10.1002/(sici)1521-3935(19980201)199:2<261::aid-macp261>3.0.co;2-p.

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33

Cecchin, Giuliano, Enzo Marchetti, and Giovanni Baruzzi. "On the Mechanism of Polypropene Growth over MgCl2/TiCl4 Catalyst Systems." Macromolecular Chemistry and Physics 202, no. 10 (June 1, 2001): 1987–94. http://dx.doi.org/10.1002/1521-3935(20010601)202:10<1987::aid-macp1987>3.0.co;2-b.

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34

Kaminsky, Walter, Christian Strübel, Hans Lechert, Dieter Genske, and Seong Ihl Woo. "Syndiotactic polypropene with MCM-41 supported metallocene [Me2C(Cp)(Flu)]ZrCl2." Macromolecular Rapid Communications 21, no. 13 (August 1, 2000): 909–12. http://dx.doi.org/10.1002/1521-3927(20000801)21:13<909::aid-marc909>3.0.co;2-d.

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35

Zeigler, Robert C. "Dynamics of polypropene and propene-ethylene copolymers at temperatures above ambient." Macromolecular Symposia 86, no. 1 (September 1994): 213–27. http://dx.doi.org/10.1002/masy.19940860117.

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36

Kukral, Jürgen, Petri Lehmus, Tanja Feifel, Carsten Troll, and Bernhard Rieger. "Dual-Sideansa-Zirconocene Dichlorides for High Molecular Weight Isotactic Polypropene Elastomers." Organometallics 19, no. 19 (September 2000): 3767–75. http://dx.doi.org/10.1021/om000224q.

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37

Turmanova, S. Ch, S. D. Genieva, A. S. Dimitrova, and L. T. Vlaev. "Non-isothermal degradation kinetics of filled with rise husk ash polypropene composites." Express Polymer Letters 2, no. 2 (2008): 133–46. http://dx.doi.org/10.3144/expresspolymlett.2008.18.

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38

Rieger, Bernhard, Carsten Troll, and Judith Preuschen. "Ultrahigh Molecular Weight Polypropene Elastomers by High Activity “Dual-Side” Hafnocene Catalysts." Macromolecules 35, no. 15 (July 2002): 5742–43. http://dx.doi.org/10.1021/ma025520o.

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39

Shiono, Takeshi, Shamsuddin Mahmud Azad, and Tomiki Ikeda. "Copolymerization of Atactic Polypropene Macromonomer with Propene by an Isospecific Metallocene Catalyst." Macromolecules 32, no. 18 (September 1999): 5723–27. http://dx.doi.org/10.1021/ma9903963.

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40

Hai-ping, Xing, Wang Yu-jie, Dong Wan, Zhang Zhen-jiang, Jiang Zhi-wei, and Tao Tang. "MEDIATING CHAIN STRUCTURE AND PHASE STRUCTURE OF POLYPROPENE MATERIALS BY MELT REACTION." Acta Polymerica Sinica 012, no. 11 (December 7, 2012): 1200–1217. http://dx.doi.org/10.3724/sp.j.1105.2012.12174.

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41

Thomann, Yi, Jürgen Suhm, Ralf Thomann, Ralf-Dieter Maier, Rolf Mülhaupt, and Georg Bär. "Morphologies and miscibilities of polypropene with random poly(ethene-co-1-butene)." Macromolecular Symposia 149, no. 1 (January 2000): 125–30. http://dx.doi.org/10.1002/1521-3900(200001)149:1<125::aid-masy125>3.0.co;2-c.

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42

Ewen, Michael, Karin Peter, Norbert Reichelt, Manfred Rätzsch, and Hartwig Höcker. "Effects of molding surfaces on the wettability of compression-molded polypropene films." Die Angewandte Makromolekulare Chemie 265, no. 1 (March 1, 1999): 36–41. http://dx.doi.org/10.1002/(sici)1522-9505(19990301)265:1<36::aid-apmc36>3.0.co;2-7.

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43

Seraidaris, Tanja, Arto Puranen, Mikko Karesoja, Barbro Löfgren, Timo Repo, Markku Leskelä, and Jukka Seppälä. "High-molar-mass polypropene with tunable elastic properties by hafnocene/borate catalysts." Journal of Polymer Science Part A: Polymer Chemistry 44, no. 16 (2006): 4743–51. http://dx.doi.org/10.1002/pola.21571.

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44

Yu, Hong, Shenjing Yu, Chunsheng Ren, and Zhilong Xiu. "Plasma-Induced Degradation of Polypropene Plastics in Natural Volatile Constituents ofLedum palustreHerb." Plasma Science and Technology 14, no. 2 (February 2012): 157–61. http://dx.doi.org/10.1088/1009-0630/14/2/14.

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45

Cobzaru, C., and B. Rieger. "Control of Ultrahigh Molecular Weight Polypropene Microstructures via Asymmetric “Dual-Side” Catalysts." Macromolecular Symposia 236, no. 1 (March 2006): 151–55. http://dx.doi.org/10.1002/masy.200690049.

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46

Thomann, R. "Influence of stereoirregularities on the formation of the γ-phase in isotactic polypropene." Polymer 42, no. 10 (February 1, 2001): 4597–603. http://dx.doi.org/10.1016/s0032-3861(00)00675-3.

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47

Stricker, F., M. Bruch, and R. Mülhaupt. "Mechanical and thermal properties of syndiotactic polypropene filled with glass beads and talcum." Polymer 38, no. 21 (October 1997): 5347–53. http://dx.doi.org/10.1016/s0032-3861(97)00065-7.

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48

HENSCHKE, O., J. KNORR, and M. ARNOLD. "Poly-α-Olefins from Polypropene to Poly-1-eicosene Made with Metallocene Catalysts." Journal of Macromolecular Science, Part A 35, no. 3 (March 1998): 473–81. http://dx.doi.org/10.1080/10601329808001990.

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49

Kaminsky, W., D. Arrowsmith, A. Laban, P. J. Lemstra, J. Loos, and U. Weingarten. "The Influence of the Polymerization Process on the Product Properties of Metallocene-Polypropene." Chemical Engineering & Technology 24, no. 11 (November 2001): 1124–28. http://dx.doi.org/10.1002/1521-4125(200111)24:11<1124::aid-ceat1124>3.0.co;2-v.

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50

Mingozzi, I., G. Cecchin, and G. Morini. "Tacticity Distribution of Polypropene by Preparative and Analytical Temperature-Rising Elution Fractionation (TREF)." International Journal of Polymer Analysis and Characterization 3, no. 4 (June 1997): 293–317. http://dx.doi.org/10.1080/10236669708032771.

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