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Journal of Polymer Research
Erschienen in: Journal of Polymer Research 8/2013

01.08.2013 | Original Paper

Cylindritic structures of isotactic polypropylene molded by sequential co-injection molding

verfasst von: Guang-Long Wang, Ying-Guo Zhou, Song-Jie Wang, Jing-Bo Chen, Xiao-Li Zhang, Sheng Lu

Erschienen in: Journal of Polymer Research | Ausgabe 8/2013

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Abstract

In this study, isotacitc polypropylene (iPP) samples were prepared by conventional injection molding (CIM) and sequential co-injection molding (SCIM), in which two kinds of polymer melt were injected into the mold cavity one after the other. The morphological structure of the samples was investigated by polarized light microscopy (PLM) and scanning electron microscopy (SEM). Results show that the structures of the samples prepared by CIM have a typical skin-core structure. This structure could be divided into three layers along the thickness direction of the samples: skin layer, transition region and core layer. However, the morphologies of the samples prepared by SCIM have a fascinating supermolecular structure that can not be roughly divided into three layers. A region of cylindritic structures, which is rare in CIM, is formed between the skin layer and the core layer of the second injected material. In particular, the cylindritic structures are more easily found when the melt temperature is relatively lower and the delay time is longer. The results were further interpreted based on the analysis and comparison of the thermo-mechanical history imposed on the melt during the CIM and SCIM processes.
Vorheriger Artikel Polymorphic transformation and crystal morphology observation of poly(1-butene)/(1-butene-co-propylene) in-reactor alloy through in-situ FT-IR and POM
Nächster Artikel A new low band gap donor–acceptor alternating copolymer containing dithienothiophene and fluorenone unit

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Literatur
1.
Yong SS, White JL, Clark ES, Oyanagi Y (1980) A basic experimental study of sandwich injection molding with sequential injection [J]. Polym Eng Sci 20:798–804CrossRef
2.
Seldon R (2000) Co-injection molding: effect of processing on material distribution and mechanical properties of a sandwich molded plate [J]. Polym Eng Sci 40(5):1165–1176CrossRef
3.
Nagaoka T, Ishiaku US, Tomari T, Hamada H, Takashima S (2005) Effect of molding parameters on the properties of PP/PP sandwich injection moldings [J]. Polym Test 24:1062–1070CrossRef
4.
Turng L, Wang V (1991) Simulation of co-injection and gas-assisted injection molding [C]. SPE-ANTEC 37:297–299
5.
Chen S, Hsu K, Jeng M (1993) Numerical simulation and experimental studies of the co-injection molding process [C]. SPE-ANTEC 39:82–86
6.
Ilinca F, Hétu JF, Derdouri A (2006) Numerical investigation of the flow front behaviour in the co-injection moulding process [J]. Int J Numer Methods Fluids 50(12):1445–1460CrossRef
7.
Karacs G (2002) Internal structure of co-injection molded PP/PP specimen [J]. J Macromol Sci B Phys B41(4–6):1279–1289
8.
Kadota M, Cakmak M, Hamada H (1999) Structureal hierarchy developed in co-injection molded polystyrene/polypropylene parts [J]. Polymer 40:3119–3145CrossRef
9.
Cheng CC, Ono Y, Jen CK (2007) Real-time diagnosis of co-injection molding using ultrasound [J]. Polym Eng Sci 47(9):1491–1500CrossRef
10.
Zhang K, Liu Z, Yang B, Yang W, Lu Y, Wang L, Sun N, Yang M (2011) Cylindritic structures of high-density polyethylene molded by multi-melt multi-injection molding [J]. Polymer 52(17):3871–3878CrossRef
11.
Gomes M, Martino D, Pontes AJ, Viana JC (2011) Co-injection molding of immiscible polymers: skin-core structure and adhesion studies [J]. Polym Eng Sci 51(12):2398–2407CrossRef
12.
Pantani R, Coccorullo I, Speranza V, Titomanlio G (2005) Modeling of morphology evolution in the injection molding process of thermoplastic polymers [J]. Prog Polym Sci 30:1185–1222CrossRef
13.
Lin X, Caton-Rose F, Ren D, Wang K (2013) Shear-induced crystallization morphology and mechanical property of high density polyethylene in micro-injection molding [J]. J Polym Res 20:122–133CrossRef
14.
Guo X, Isayev AI, Guo L (1999) Crystallinity and microstructure in injection moldings of isotactic polypropylenes. Part 1: a new approach to modeling and model parameters [J]. Polym Eng Sci 39(10):2096–2114CrossRef
15.
Fujiyama M, Masada I, Mitani K (2000) Melting and crystallization behaviors of injection-molded polypropylene[J]. J Appl Polym Sci 78:1751–1762CrossRef
16.
Viana JC, Cunha AM, Billon N (2001) The effect of the skin thickness and spherulite size on the mechanical properties of injection mouldings [J]. J Mater Sci 36:4411–4418CrossRef
17.
Viana JC, Cunha AM, Billon N (2002) The thermomechanical environment and the microstructure of an injection moulded polypropylene copolymer [J]. Polymer 43:4185–4196CrossRef
18.
Viana JC (2004) Development of the skin layer in injection moulding: phenomenological model [J]. Polymer 45:993–1005CrossRef
19.
Shen C, Zhou Y, Chen J, Li Q (2008) Numerical simulation of crystallization morphological evolution under non-isothermal condition [J]. Polym Plast Technol Eng 47(7):708–715CrossRef
20.
Zhu PW, Edward G (2004) Distribution of Shish-Kebab structure of isotactic polypropylene under shear in the presence of nucleating agent [J]. Macromolecules 37:2658–2660CrossRef
21.
Wang Y, Na B, Fu Q, Men YF (2004) Shear induced shish–kebab structure in PP and its blends with LLDPE [J]. Polymer 45:207–215CrossRef
22.
Ludwig HC, Fischer G, Becker H (1995) A quantitative comparison of morphology and fiber orientation in push-pull processed and conventional injecion-molded parts [J]. Compos Sci Technol 53:235–239CrossRef
23.
Waschitschek K, Kech A, Christiansen JC (2002) Influence of push-pull injection molding on fibers and matrix of fibre reinforced polypropylene [J]. Compos A: Appl Sci Manuf 33:735–744CrossRef
24.
Somani RH, Yang L, Zhu L, Hsiao BS (2005) Flow-induced shish-kebab precursor structures in entangled polymer melts [J]. Polymer 46:8587–8623CrossRef
25.
Na B, Li Z, Lv R (2011) Oriented re-crystallization of polypropylene through partial melting and its dramatic influence on mechanical properties [J]. J Polym Res 18:2103–2108CrossRef
26.
Zhou Y, Turng L, Shen C (2010) Morphological evolution and orientation development of stretched iPP films: influence of draw ratio [J]. J Polymer Sci, Part B: Polymer Phys 48(11):1223–1234CrossRef
27.
Varga J, Karger-Kocsis J (1996) Rules of supermolecular structure formation in sheared isotactic polypropylene melts [J]. J Polymer Sci, Part B: Polymer Phys 34:657–670CrossRef
28.
Li H, Zhang X, Kuang X, Wang J, Wang D, Li L, Yan S (2004) A scanning electron microscopy study on the morphologies of Isotactic Polypropylene induced by its own fibers [J]. Macromolecules 37(8):2847–2853CrossRef
29.
Somani RH, Yang L, Sics I, Hsiao BS, Pogodina NV, Winter HH, Agarwal P, Fruitwala H, Tsou A (2002) Orientation-induced crystallization in isotactic polypropylene melt by shear deformation [J]. Macromol Symp 185:105–117CrossRef
30.
Zhang CG, Hu HQ, Wang DJ, Yan SK, Han CC (2005) In situ optical microscope study of the shear-induced crystallization of isotactic polypropylene [J]. Polymer 46:8157–8161CrossRef
31.
Zhou Q, Liu F, Guo C, Fu Q, Shen K, Zhang J (2011) Shish–kebab-like cylindrulite structures resulted from periodical shear-induced crystallization of isotactic polypropylene [J]. Polymer 52(13):2970–2978CrossRef
32.
Bai H, Luo F, Zhou T, Deng H, Wang K, Fu Q (2011) New insight on the annealing induced microstructural changes and their roles in the toughening of β-form polypropylene [J]. Polymer 52:2351–2360CrossRef
33.
Luo F, Wang J, Bai H, Wang K, Deng H, Zhang Q, Chen F, Fu Q, Na B (2011) Synergistic toughening of polypropylene random copolymer at low temperature: β-Modification and annealing [J]. Polymer 528(22–23):7052–7059
34.
Lotz B (1998) α and β phases of isotactic polypropylene a case of growth kinetics ‘phase reentrency’ in polymer crystallization [J]. Polymer 39(19):4561–4567CrossRef
35.
Lu Q, Dou Q (2009) β-Crystal formation of isotactic polypropylene induced by N, N’-dicyclohexylsuccinamide [J]. J Polym Res 16:555–560CrossRef
36.
Wenig W, Herzog F (1993) Injection molding of polypropylene: x-ray investigation of the skin–core morphology [J]. J Appl Polym Sci 50(12):2163–2171CrossRef
37.
Varga J, Karger-Kocsis J (1993) Direct evidence of row-nucleated cylindritic crystallization in glass fiber-reinforced polypropylene composites [J]. Polym Bull 30:105–110CrossRef
38.
Ziabicki A (2005) Nucleation-controlled multiphase transitions [J]. J Chem Phys 103:123–174
39.
Bassett DC (2006) Linear nucleation of polymers [J]. Polymer 47:5221–5227CrossRef
Metadaten
Titel
Cylindritic structures of isotactic polypropylene molded by sequential co-injection molding
verfasst von
Guang-Long Wang
Ying-Guo Zhou
Song-Jie Wang
Jing-Bo Chen
Xiao-Li Zhang
Sheng Lu
Publikationsdatum
01.08.2013
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 8/2013
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-013-0212-7

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