期刊
PHYSICAL REVIEW LETTERS
卷 100, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.146001
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资金
- NIBIB NIH HHS [1 R01 EB003172-01] Funding Source: Medline
- PHS HHS [2 P20 016472-04] Funding Source: Medline
The viscoelastic properties of physical and chemical polymer gels are characterized through the liquid-solid transition using particle tracking microrheology. Measurements of the probe particle mean-squared displacement are shifted as the extent of gelation increases to generate master curves. From the shift factors, we determine the gel point and critical scaling exponents. Both systems exhibit a critical relaxation exponent n approximate to 0.6, where G' similar to G '' similar to omega(n) for the incipient gel, consistent with the Rouse model of dynamic scaling in the percolation universality class.
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