Polydimethylsiloxane assisted supercritical CO2 foaming behavior of high melt strength polypropylene grafted with styrene

Weixia Wang, Shuai Zhou, Zhong Xin, Yaoqi Shi, Shicheng Zhao

PDF(465 KB)
PDF(465 KB)
Front. Chem. Sci. Eng. ›› 2016, Vol. 10 ›› Issue (3) : 396-404. DOI: 10.1007/s11705-016-1577-z
RESEARCH ARTICLE

Polydimethylsiloxane assisted supercritical CO2 foaming behavior of high melt strength polypropylene grafted with styrene

Author information +
History +

Abstract

Foamable high melt strength polypropylene (HMSPP) was prepared by grafting styrene (St) onto polypropylene (PP) and simultaneously introducing polydimethylsiloxane (PDMS) through a one-step melt extrusion process. The effect of PDMS viscosity on the foaming behavior of HMSPP was systematically investigated using supercritical CO2 as the foaming agent. The results show that the addition of PDMS has little effect on the grafting reaction of St and HMSPP exhibits enhanced elastic response and obvious strain hardening effect. Though the CO2 solubility of HMSPP with PDMS (PDMS-HMSPP) is lower than that of HMSPP without PDMS, especially for PDMS with low viscosity, the PDMS-HMSPP foams exhibit narrow cell size distribution and high cell density. The fracture morphology of PDMS-HMSPP shows that PDMS with low viscosity disperses more easily and uniformly in HMSPP matrix, leading to form small domains during the extrusion process. These small domains act as bubble nucleation sites and thus may be responsible for the improved foaming performance of HMSPP.

Graphical abstract

Keywords

high melt strength polypropylene (HMSPP) / polydimethylsiloxane (PDMS) / supercritical CO2 / foaming behavior

Cite this article

Download citation ▾
Weixia Wang, Shuai Zhou, Zhong Xin, Yaoqi Shi, Shicheng Zhao. Polydimethylsiloxane assisted supercritical CO2 foaming behavior of high melt strength polypropylene grafted with styrene. Front. Chem. Sci. Eng., 2016, 10(3): 396‒404 https://doi.org/10.1007/s11705-016-1577-z

References

[1]
Oh K, Seo Y, Hong S, Takahara A, Lee K, Seo Y. Dispersion and reaggregation of nanoparticles in the polypropylene copolymer foamed by supercritical carbon dioxide. Physical Chemistry Chemical Physics, 2013, 15(26): 11061–11069
CrossRef Google scholar
[2]
Lan X, Zhai W, Zheng W. Critical effects of polyethylene addition on the autoclave foaming behavior of polypropylene and the melting behavior of polypropylene foams blown with n-pentane and CO2. Industrial & Engineering Chemistry Research, 2013, 52(16): 5655–5665
CrossRef Google scholar
[3]
Ding J, Ma W, Song F, Zhong Q. Effect of nano-calcium carbonate on microcellular foaming of polypropylene. Journal of Materials Science, 2013, 48(6): 2504–2511
CrossRef Google scholar
[4]
Naguib H, Park C, Reichelt N. Fundamental foaming mechanisms governing the volume expansion of extruded polypropylene foams. Journal of Applied Polymer Science, 2004, 91(4): 2661–2668
CrossRef Google scholar
[5]
Wang K, Wu F, Zhai W, Zheng W. Effect of polytetrafluoroethylene on the foaming behaviors of linear polypropylene in continuous extrusion. Journal of Applied Polymer Science, 2013, 129(4): 2253–2260
CrossRef Google scholar
[6]
Chaudhary A, Jayaraman K. Extrusion of linear polypropylene-clay nanocomposite foams. Polymer Engineering and Science, 2011, 51(9): 1749–1756
CrossRef Google scholar
[7]
Li Y, Yao Z, Chen Z, Qiu S, Zeng C, Cao K. High melt strength polypropylene by ionic modification: Preparation, rheological properties and foaming behaviors. Polymer, 2015, 70: 207–214
CrossRef Google scholar
[8]
Li S, Xiao M, Guan Y, Wei D, Xiao H, Zheng A. A novel strategy for the preparation of long chain branching polypropylene and the investigation on foamability and rheology. European Polymer Journal, 2012, 48(2): 362–371
CrossRef Google scholar
[9]
Zhang Z, Wan D, Xing H, Tan H, Wang L, Zheng J, An Y, Tang T. A new grafting monomer for synthesizing long chain branched polypropylene through melt radical reaction. Polymer, 2012, 53(1): 121–129
CrossRef Google scholar
[10]
Zhou S, Zhao S, Xin Z. Preparation and foamability of high melt strength polypropylene based on grafting vinyl polydimethylsiloxane and styrene. Polymer Engineering and Science, 2015, 55(2): 251–259
CrossRef Google scholar
[11]
Antunes M, Realinho V, Velasco J. Foaming behaviour, structure, and properties of polypropylene nanocomposites foams. Journal of Nanomaterials, 2010, 2010(4): 1–11
CrossRef Google scholar
[12]
Bhattacharya S, Gupta R, Jollands M, Bhattacharya S. Foaming behavior of high-melt strength polypropylene/clay nanocomposites. Polymer Engineering and Science, 2009, 49(10): 2070–2084
CrossRef Google scholar
[13]
Wang M, Ma J, Chu R, Park C, Nanqiao Z. Effect of the introduction of polydimethylsiloxane on the foaming behavior of block-copolymerized polypropylene. Journal of Applied Polymer Science, 2012, 123(5): 2726–2732
CrossRef Google scholar
[14]
Bing L, Wu Q, Zhou N, Shi B. Batch foam processing of polypropylene/polydimethylsiloxane blends. International Journal of Polymeric Materials, 2010, 60(1): 51–61
CrossRef Google scholar
[15]
Spitael P, Macosko C, McClurg R. Block copolymer micelles for nucleation of microcellular thermoplastic foams. Macromolecules, 2004, 37(18): 6874–6882
CrossRef Google scholar
[16]
Prakashan K, Gupta A, Maiti S. Effect of compatibilizer on micromehanical deformations and morphology of dispersion in PP/PDMS blend. Journal of Applied Polymer Science, 2007, 105(5): 2858–2867
CrossRef Google scholar
[17]
Wu Q, Park C, Zhou N, Zhu W. Effect of temperature on foaming behaviors of homo-and co-polymer polypropylene/polydimethylsiloxane blends with CO2. Journal of Cellular Plastics, 2009, 45(4): 303–319
CrossRef Google scholar
[18]
Wang W, Zhou S, Xin Z, Shi Y, Zhao S, Meng X. Preparation and foaming mechanism of foamable polypropylene based on self-assembled nanofibrils from sorbitol nucleating agents. Journal of Materials Science, 2016, 51(2): 788–796
CrossRef Google scholar
[19]
Chen J, Liu T, Zhao L, Yuan W. Determination of CO2 solubility in isotactic polypropylene melts with different polydispersities using magnetic suspension balance combined with swelling correction. Thermochimica Acta, 2012, 530: 79–86
CrossRef Google scholar
[20]
Kumar V, Suh N. A process for making microcellular thermoplastic parts. Polymer Engineering and Science, 1990, 30(20): 1323–1329
CrossRef Google scholar
[21]
Deng Q, Fu Z, Sun F, Xu J, Fan Z. Structure and rheological properties of the products of solid-state graft polymerization of styrene in annealed polypropylene reactor granules. Polymer-Plastics Technology and Engineering, 2009, 48(5): 516–524
CrossRef Google scholar
[22]
Lagendijk R, Hogt A, Buijtenhuijs A, Gotsis A. Peroxydicarbonate modification of polypropylene and extensional flow properties. Polymer, 2001, 42(25): 10035–10043
CrossRef Google scholar
[23]
Tian J, Yu W, Zhou C. The preparation and rheology characterization of long chain branching polypropylene. Polymer, 2006, 47(23): 7962–7969
CrossRef Google scholar
[24]
Wood-Adams P, Dealy J, Degroot A, Redwine O. Effect of molecular structure on the linear viscoelastic behavior of polyethylene. Macromolecules, 2000, 33(20): 7489–7499
CrossRef Google scholar
[25]
Xu Z, Zhang Z, Guan Y, Wei D, Zheng A. Investigation of extensional rheological behaviors of polypropylene for foaming. Journal of Cellular Plastics, 2013, 49(4): 317–334
CrossRef Google scholar
[26]
Auhl D, Stadler F, Muenstedt H. Comparison of molecular structure and rheological properties of electron-beam- and gamma-irradiated polypropylene. Macromolecules, 2012, 45(4): 2057–2065
CrossRef Google scholar
[27]
Jalbert C, Koberstein J, Yilgor I, Gallagher P, Krukonis V. Molecular weight dependence and end-group effects on the surface tension of poly(dimethylsiloxane). Macromolecules, 1993, 26(12): 3069–3074
CrossRef Google scholar
[28]
Zhai W, Kuboki T, Wang L, Park C, Lee E, Naguib H. Cell structure evolution and the crystallization behavior of polypropylene/clay nanocomposites foams blown in continuous extrusion. Industrial & Engineering Chemistry Research, 2010, 49(20): 9834–9845
CrossRef Google scholar

Acknowledgements

This work was financially supported by National Natural Science Foundation of China (Grant Nos. 21476085 and 21306047), Fundamental Research Funds for the Central Universities of China (22A201514016; 222201314051).
Funding
 

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg
AI Summary AI Mindmap
PDF(465 KB)

Accesses

Citations

Detail

Sections
Recommended

/