引用本文:
Quan Fu An, Jin Wen Qian, Meng Wang, Yin Lu, Phillip Choi. Relation between the permeability and the degree of coil overlap of polymer in the bulk state[J]. Chinese Chemical Letters,
2007, 18(11): 1423-1426.
doi:
10.1016/j.cclet.2007.09.007
Citation: Quan Fu An, Jin Wen Qian, Meng Wang, Yin Lu, Phillip Choi. Relation between the permeability and the degree of coil overlap of polymer in the bulk state[J]. Chinese Chemical Letters, 2007, 18(11): 1423-1426. doi: 10.1016/j.cclet.2007.09.007
Citation: Quan Fu An, Jin Wen Qian, Meng Wang, Yin Lu, Phillip Choi. Relation between the permeability and the degree of coil overlap of polymer in the bulk state[J]. Chinese Chemical Letters, 2007, 18(11): 1423-1426. doi: 10.1016/j.cclet.2007.09.007
Relation between the permeability and the degree of coil overlap of polymer in the bulk state
摘要:
Based on the expression of the index of coil interpenetration (i. e., the degree of coil overlap, ξb) of amorphous polymers in the bulk state proposed by Qian, the ξb was rewritten as ξb=ρb[η]θ/1.66 via Flory's intrinsic viscosity equation at theta conditions. The ξb of poly (vinyl chloride) (PVC) dense membranes with different molecular weights and cellulose diacetate (CA) dense membranes prepared using different solvents were determined. The permeability, permeation coefficient (P) of nitrogen and permeation flux (J) of liquid through both membranes, respectively, was measured. P and J decreased exponentially with increasing ξb for PVC and CA membranes were revealed.
English
Relation between the permeability and the degree of coil overlap of polymer in the bulk state
Abstract:
Based on the expression of the index of coil interpenetration (i. e., the degree of coil overlap, ξb) of amorphous polymers in the bulk state proposed by Qian, the ξb was rewritten as ξb=ρb[η]θ/1.66 via Flory's intrinsic viscosity equation at theta conditions. The ξb of poly (vinyl chloride) (PVC) dense membranes with different molecular weights and cellulose diacetate (CA) dense membranes prepared using different solvents were determined. The permeability, permeation coefficient (P) of nitrogen and permeation flux (J) of liquid through both membranes, respectively, was measured. P and J decreased exponentially with increasing ξb for PVC and CA membranes were revealed.
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Key words:
- Degree of coil overlap
- / Permeability
- / Dense polymer membranes
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