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Citation: Zhang Hao, He Zhiduan. DILUTE SOLUTION PROPERTIES OF RING-SHAPED POLYSTYRENE Ⅱ. THE SECOND VIRIAL COEFFICIENTS[J]. Acta Physico-Chimica Sinica, ;1989, 5(06): 736-738. doi: 10.3866/PKU.WHXB19890619 shu

DILUTE SOLUTION PROPERTIES OF RING-SHAPED POLYSTYRENE Ⅱ. THE SECOND VIRIAL COEFFICIENTS

Zhang Hao ,
He Zhiduan

1.
Laboratary of Polymer Physics Changchun Institute of Applied Chemistry; Academia Sinica; Changchun

Received Date: 28 March 1988
Available Online: 15 December 1989

Using a low angle laser light scattering photometer (LALLS) the second virial coefficients(A_2) of ring-shaped and linear polystyrene (RPS and LPS) samples were determined in both toluene and butanone solutions. The A_2 of RPS in the od solvent (toluene) is smaller than that of LPS with the same molecular weight, but in the poor solvent (butanone) these two are very close. For RPS in the molecular weight range of 4×10~4——2.2×10~5, we have
A_(2r)=1.28×10~(-2)M_w~(-0.283) (Toluene 25 ℃)
and A_(2r)=5.06×10~(-2)M_w~(-0.273) (Butanone 25 ℃).
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