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1989 Volume 7 Issue 2
1989, 7(2): 97-102
Abstract:
The fluorescence behaviours of a new polymer poly [oxy-2 (4-N, N-dimethylaminobenzyl) propane-1 , 3-diyloxy-terephthaloyl] (Ⅰ) in solution were studied. Inter-and intra -molecular exciplex is formed between the singlet excited state of N, N- dimethyl...
The fluorescence behaviours of a new polymer poly [oxy-2 (4-N, N-dimethylaminobenzyl) propane-1 , 3-diyloxy-terephthaloyl] (Ⅰ) in solution were studied. Inter-and intra -molecular exciplex is formed between the singlet excited state of N, N- dimethyl...
1989, 7(2): 103-110
Abstract:
The morphology of shear-oriented films of a thermotropic liquid crystalline polyester containing a triad ester mesogenic unit and a flexible spacer has been investigated in details. The formation conditions and process, the fine structures and the re...
The morphology of shear-oriented films of a thermotropic liquid crystalline polyester containing a triad ester mesogenic unit and a flexible spacer has been investigated in details. The formation conditions and process, the fine structures and the re...
1989, 7(2): 111-118
Abstract:
In a capacitively coupled RF discharge system with external electrodes ,hexamethyicyclotrisiloxane was polymerized, and the effects of discharge power and plasma gas on polymer deposition rate were studied. The polymer structures and properties were ...
In a capacitively coupled RF discharge system with external electrodes ,hexamethyicyclotrisiloxane was polymerized, and the effects of discharge power and plasma gas on polymer deposition rate were studied. The polymer structures and properties were ...
1989, 7(2): 119-123
Abstract:
The behaviour of monolayers of copolymers of oxyethylene and oxypropylene (UH29 and UH68), polypropylene glycol (UHPPG)and their binary mixtures on air-water interface has been investigated carefully on compression-expansion cycles. The first compres...
The behaviour of monolayers of copolymers of oxyethylene and oxypropylene (UH29 and UH68), polypropylene glycol (UHPPG)and their binary mixtures on air-water interface has been investigated carefully on compression-expansion cycles. The first compres...
1989, 7(2): 124-131
Abstract:
The PVC/EBBA ultrathin composite membranes with thickness of about 100 nm were prepared by spreading the solution on water surface. The overlapped composite membrane showed a characteristic aggregation structure in which the polymer matrix exists as ...
The PVC/EBBA ultrathin composite membranes with thickness of about 100 nm were prepared by spreading the solution on water surface. The overlapped composite membrane showed a characteristic aggregation structure in which the polymer matrix exists as ...
1989, 7(2): 132-142
Abstract:
Film specimens of four segmented polyurethanes with different soft segments, namely polycaprolactone, polytetramethylene adipate, polytetramethylene oxide and polypropylene oxide, and their blends with PVC of different compositions were obtained by s...
Film specimens of four segmented polyurethanes with different soft segments, namely polycaprolactone, polytetramethylene adipate, polytetramethylene oxide and polypropylene oxide, and their blends with PVC of different compositions were obtained by s...
1989, 7(2): 143-149
Abstract:
In this paper the change of segment ratio, segmental sequence distribution and randonmess B of PET-PTMG block copolymer have been investigated by IR and 13C-NMR spectra during the polycondensation reaction.
In this paper the change of segment ratio, segmental sequence distribution and randonmess B of PET-PTMG block copolymer have been investigated by IR and 13C-NMR spectra during the polycondensation reaction.
1989, 7(2): 150-158
Abstract:
Three specimens from a solution-cast poly (ethylene terephthalate) (PET) film, one being liquid-N2 quenched from 92℃(Q), one being slowly cooled from 92℃(SC) and one being quenched and sub-Tg annealed at 67℃(AN), have been studied by specimen differe...
Three specimens from a solution-cast poly (ethylene terephthalate) (PET) film, one being liquid-N2 quenched from 92℃(Q), one being slowly cooled from 92℃(SC) and one being quenched and sub-Tg annealed at 67℃(AN), have been studied by specimen differe...
1989, 7(2): 159-164
Abstract:
Copolymer of divinyl ether and maleic anhydride (DVE-co-MA) derivatives of cis-platinum complexes were synthesized and characterized by elementary analysis, IR and XPS ( X-ray photoelectron spectroscopy). The behavior of the products in biological en...
Copolymer of divinyl ether and maleic anhydride (DVE-co-MA) derivatives of cis-platinum complexes were synthesized and characterized by elementary analysis, IR and XPS ( X-ray photoelectron spectroscopy). The behavior of the products in biological en...
1989, 7(2): 165-173
Abstract:
Effects of N-alkyi substituted ethylenediamine derivatives on vinyl polymerization using persulfate as initiator were studied. The apparent kinetic equations and overall activation energies of acrylamide polymerization were determined using the above...
Effects of N-alkyi substituted ethylenediamine derivatives on vinyl polymerization using persulfate as initiator were studied. The apparent kinetic equations and overall activation energies of acrylamide polymerization were determined using the above...
1989, 7(2): 174-178
Abstract:
The crystalline behavior of urethane substitute polydiacetylene was studied by using pohrized light and electron microscopy. The lamellar morphological structure was observed in the crystallized films. The thickness of lamellae is about 300A, being i...
The crystalline behavior of urethane substitute polydiacetylene was studied by using pohrized light and electron microscopy. The lamellar morphological structure was observed in the crystallized films. The thickness of lamellae is about 300A, being i...
1989, 7(2): 179-182
Abstract:
Eight new polyphosphates containing both nucleic acid base and phosphonoacetic acid ethyl ester were synthesized by the polycondensation of P, P-dichloride of phosphonoacetic acid ethyl ester with 1, 3-dihydroxyalkyl-5-fluorouracil, 1,3-dihydroxyalky...
Eight new polyphosphates containing both nucleic acid base and phosphonoacetic acid ethyl ester were synthesized by the polycondensation of P, P-dichloride of phosphonoacetic acid ethyl ester with 1, 3-dihydroxyalkyl-5-fluorouracil, 1,3-dihydroxyalky...
1989, 7(2): 183-188
Abstract:
new method for the preparation of a soluble ladderlike polymethylsilsesquioxane with high molecular weight ((MW)=105—106) and low molecular weight distribution (D=Mw/Mn) in common solvents instead of the formerly used toxic methylisobutylketone has b...
new method for the preparation of a soluble ladderlike polymethylsilsesquioxane with high molecular weight ((MW)=105—106) and low molecular weight distribution (D=Mw/Mn) in common solvents instead of the formerly used toxic methylisobutylketone has b...
1989, 7(2): 189-192
Abstract:
