Amide-based oligomers for low-viscosity composites of polyamide 66

Jaehoon Lee; Wan Gi Seo; Jaehyun Kim; Yong Seok Kim; Youngjae Yoo; Joong Ho Moon; Sang Gu Kim; Hyun Min Jung

Macromolecular Research, Vol.25, No.10, 1000-1006, October, 2017

DOI10.1007/s13233-017-5129-2 Export Citation

Amide-based oligomers for low-viscosity composites of polyamide 66

Jaehoon Lee, Wan Gi Seo, Jaehyun Kim, Yong Seok Kim¹, Youngjae Yoo¹, Joong Ho Moon², Sang Gu Kim³, and Hyun Min Jung^†

Department of Applied Chemistry, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Korea
¹Advanced Materials Division, Korea Research Institute of Chemical Technology, 19 Sinseongno, Yuseong, Daejeon 34114, Korea
²Department of Chemistry and Biochemistry, Biomolecular Sciences Institute, Florida International University, Miami, USA
³Woosung Chemical Co., Ltd., 18 Daewondang-gil, Youngcheon, Gyeongbuk 38906, Korea

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Melt viscosity control of polyamides is an important issue concerning polymer processing and quality composites which are directly influenced by the melt viscosity in extrusion and injection molding processes. In this work, a series of linear and cyclic PA6 (nylon6), PA46 (nylon46), and PA66 (nylon66)-based amide oligomers consisting of <10 repeat units are prepared. The melt viscosities of the composites of each oligomer in a PA66 matrix are investigated. The linear oligomers have a larger viscosity-decreasing effect than cyclic oligomers containing the same repeat unit. Linear PA6 and PA46-based oligomers show a greater melt viscosity reduction than PA66-based ones, especially in PA6-based linear oligomer (A6-L), which shows a reduction of >30%. This result suggests that proper hydrogen bonding mismatching in the polymer chain network plays an important role for lowering viscosity. A6-L/PA66 composites impregnated with 40 wt% glass fiber show a twofold increase in the melt flow index while maintaining their mechanical strengths.

Keywords:polyamide;melt viscosity;oligomer;hydrogen-bonding

[References]

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[Referenced By]

[1] Hult A, Johansson M, Malmstrom E, Advances in Polymer Science (Branched Polymers II), Springer-Verlag, Berlin Heidelberg, 1999, Vol. 143, pp 1-34.

[2] Mulhaupt R, Engelhardt T, Schall N, Kunststoffe International, 10, 55 (2001)

[3] Brunelle DJ, in Cyclic Polymers, J. A. Semlyen, Eds., 2nd ed., Kluwer Academic Publishers, New York, 2002, pp 185-228.

[4] Murphy J, Additives for Plastics Handbook, 2nd ed., Elsevier Science Ltd, Oxford, 2001, pp 205-218.

[5] Richter E, Kunststoffe International, 9, 36 (2000)

[6] Ellis TS, Polymer, 36(20), 3919 (1995)

[7] Li YL, Yang GS, Macromol. Rapid Commun., 25(19), 1714 (2004)

[8] Wang X, Yang G, Zheng O, Macromol. Mater. Eng., 292, 197 (2007)

[9] Shibayama M, Uenoyama K, Oura JI, Nomura S, Polymer, 36(25), 4811 (1995)

[10] Liu Y, Donovan JA, Polymer, 36(25), 4797 (1995)

[11] Wei M, Shin ID, Urban B, Tonelli AE, J. Polym. Sci. B: Polym. Phys., 42(8), 1369 (2004)

[12] Khanna YP, Murthy NS, Kuhn WP, Day ED, Polym. Eng. Sci., 39(11), 2222 (1999)

[13] Tomova D, Kressler J, Radusch HJ, Polymer, 41(21), 7773 (2000)

[14] Skrovanek DJ, Howe SE, Painter PC, Coleman MM, Macromolecules, 18, 1676 (1985)

[15] Skrovanek DJ, Painter PC, Coleman MM, Macromolecules, 19, 699 (1986)

[16] Kricheldorf HR, Al Masri M, Schwarz G, Macromolecules, 36(23), 8648 (2003)

[17] Kricheldorf HR, Bohme S, Schwarz G, Macromolecules, 34(26), 8879 (2001)

[18] Rulkens R, Peters R, J. Polym. Sci. A: Polym. Chem., 49(9), 2090 (2011)

[19] Montaudo G, Montaudo MS, Puglisi C, Samperi F, J. Polym. Sci. A: Polym. Chem., 34(3), 439 (1996)

[20] Chionna D, Puglisi C, Samperi F, Montaudo G, Turturro A, Macromol. Rapid Commun., 22(7), 524 (2001)

[21] Pulisi C, Samperi F, Giorgi SD, Montaudo G, Polym. Degrad. Stabil., 78, 369 (2002)

[22] Mitomo H, Nakazato K, Kuriyama I, Polymer, 19, 1427 (1978)

[23] Arakawa T, Nagatoshi F, Arai N, J. Polym. Sci.,, 6, 513 (1968)