Abstract
A series of strain, temperature and frequency sweep measurements were performed to systematically study the dynamic rheological properties of polycarbosilance (PCS) in linear viscoelastic region determined by small-amplitude oscillatory shear test. No matter whether during the pre-treated process or testing process, both temperature and holding time have distinct influence in the PCS’s rheological property which can be attested by the changes of critical strain and plateau modulus. A characteristic temperature obtained from the temperature ramp measurement was compared with the softening point temperature of PCS, which is associated with the phase change from solid to melt. PCS exhibited no plateau region in frequency sweep curve and showed a complex thermorheologically melt behavior in time-temperature superposition due to its notably lower molecular weights and complex molecular structures.
Similar content being viewed by others
References
Stadler FJ, Kaschta J, Muenstedt H (2008) Thermorheological behavior of various long-chain branched polyethylenes. Macromolecules 41(4):1328–1333
Hasegawa Y, Okamura K (1986) Synthesis of continuous silicon carbide fiber. Part 4. The structure of polycarbosilane as the precursor. J Mater Sci 21(1):321–328
Larson RG (1999) The structure and rheology of complex fluids. Oxford University Press, New York
Berry G (2000) Polymer rheology: principles, techniques and application. American Chemical Society, New York
He C, Wood-Adams P, Dealy JM (2004) Broad frequency range characterization of molten polymers. J Rheol 48(4):711–724
Yakovlew G, Karnaukhov V, Goncharov L (1976) Experimental investigation of viscoelastic properties of polymer materials. Probl Prochn 3:123–124
Mours M, Winter HH (1995) Viscoelasticity of polymers during heating/cooling sweeps. Ind Eng Chem Res 34(10):3217–3722
Yajima S, Hayashi J, Omori M, Okamura K (1976) Development of a silicon carbide fiber with high tensile strength. Nature 261(5562):683–685
Laine RM, Babonneau F (1993) Preceramic polymer routes to silicon carbide. Chem Mater 5(3):260–279
Birot M, Pillot JP, Dunogues J (1995) Comprehensive chemistry of polycarbosilanes, polysilazanes, and polycarbosilazanes as precursors of ceramics. Chem Rev 95(5):1443–1477
Yajima S, Hasegawa Y, Hayashi J, Iimura M (1978) Synthesis of continuous silicon carbide fiber with high tensile strength and high Young’s modulus. Part 1. Synthesis of polycarbosilane as precursor. J Mater Sci 13 (12):2569–2576
Hasegawa Y, Okamura K (1983) Synthesis of continuous silicon carbide fiber. Part 3. Pyrolysis process of polycarbosilane and structure of the products. J Mater Sci 18(12):3633–3648
Yu R, Yu W, Zhou C, Feng JJ (2007) Rheology and relaxation processes in a melting thermotropic liquid-crystalline polymer. J Appl Polym Sci 104(6):3780–3787
Cheng X, Bai X, Li L, Chen H, Zhang Y (2010) Experimental observations of time-dependent behaviors for polycarbosilane melt. J Appl Polym Sci 120:3395–3400
Barnes H (2000) A handbook of elementary rheology. University of Wales, Wales
Fragiadakis D, Dou S, Colby RH, Runt J (2008) Molecular mobility, ion mobility, and mobile ion concentration in poly(ethylene oxide)-based polyurethane ionomers. Macromolecules 41(15):5723–5728
Brummer R (2006) Rheology essentials of cosmetic and food emulsions. Springer, Berlin
Acknowledgements
The authors wish to thank the financial supports from National Natural Science Foundation of China (50532010), and Fujian Key Laboratory of Advanced Materials (Xiamen University) (2006L2003).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Chen, H., Cheng, X., Li, J. et al. Dynamic Rheological Characteristics of Polycarbosilance Melt in Linear Viscoelastic Region. Silicon 11, 891–897 (2019). https://doi.org/10.1007/s12633-018-9891-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12633-018-9891-3