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1990 Volume 8 Issue 2
1990, 8(2): 97-107
Abstract:
The use of living, alkyllithium-initiated anionic polymerization to prepare chain-end functionalized polymers and heteroarm, star-branched polymers is discussed. The scope and limitations of specific termination reactions with a variety of electrophi...
The use of living, alkyllithium-initiated anionic polymerization to prepare chain-end functionalized polymers and heteroarm, star-branched polymers is discussed. The scope and limitations of specific termination reactions with a variety of electrophi...
1990, 8(2): 108-114
Abstract:
The effects of magnetic field on the graft ratio and stereoregularity of grafts of PVA-g-MMA in the presence ofbenzophenone during UV irradiation are discussed. By means of IR, it was found that the graft ratio was increased with the increment of mag...
The effects of magnetic field on the graft ratio and stereoregularity of grafts of PVA-g-MMA in the presence ofbenzophenone during UV irradiation are discussed. By means of IR, it was found that the graft ratio was increased with the increment of mag...
1990, 8(2): 115-120
Abstract:
This study is concerned with chitosan-polyacrylic acid complex as a carrier to immobilize glucose oxidase (GOD)and cellulase. The optimum emperature of the immobilized GOD (IG) was determined to be 60℃ which is higher than that of the native GOD abou...
This study is concerned with chitosan-polyacrylic acid complex as a carrier to immobilize glucose oxidase (GOD)and cellulase. The optimum emperature of the immobilized GOD (IG) was determined to be 60℃ which is higher than that of the native GOD abou...
1990, 8(2): 121-126
Abstract:
The reaction mechanisms of diene polymerization with homogeneous rare earth catalyst are studied by means of the spectra of1H-NMR, one-and two-dimensions 13C-NMR. Based on the data of above NMR spectra, it is proposed that the polymerization reaction...
The reaction mechanisms of diene polymerization with homogeneous rare earth catalyst are studied by means of the spectra of1H-NMR, one-and two-dimensions 13C-NMR. Based on the data of above NMR spectra, it is proposed that the polymerization reaction...
1990, 8(2): 127-132
Abstract:
Poly (β-carboxyethylmethylsiloxane)-LiClO4 and poly (β-alkoxylethylmethylsiloxane)-LiClO4 crosslinked fllms have been prepared. The ionic conductivity of the films depends on the polymer species, concentration of lithium perchlorate, temperature and ...
Poly (β-carboxyethylmethylsiloxane)-LiClO4 and poly (β-alkoxylethylmethylsiloxane)-LiClO4 crosslinked fllms have been prepared. The ionic conductivity of the films depends on the polymer species, concentration of lithium perchlorate, temperature and ...
1990, 8(2): 133-141
Abstract:
A new type of β-diketone based side chain liquid crystalline polysiloxanes (DKLCP) with different length of flexible spacers and end groups have been synthesized by hydrosilation reaction. This is liquid crystal polymers (LCP) using coordinating β-di...
A new type of β-diketone based side chain liquid crystalline polysiloxanes (DKLCP) with different length of flexible spacers and end groups have been synthesized by hydrosilation reaction. This is liquid crystal polymers (LCP) using coordinating β-di...
1990, 8(2): 142-148
Abstract:
A kinetic equation of non-isothermal crystamzation was derived by extending Avrami's equation to the non-isothermal situation. More crystallization information can be obtained from this kinetic equation. The curves of non-isothermal and isothermal cr...
A kinetic equation of non-isothermal crystamzation was derived by extending Avrami's equation to the non-isothermal situation. More crystallization information can be obtained from this kinetic equation. The curves of non-isothermal and isothermal cr...
1990, 8(2): 149-157
Abstract:
In order to improve the mechanical properties of polypyrrole, composites were made by electropolymerizing polypyrrole in a polyurethane matrix. Polypyrrole/polyurethane (PPY/PU) composite films containing CLO4-, BF4-or CH3-C6H4-SO3- counter ions were...
In order to improve the mechanical properties of polypyrrole, composites were made by electropolymerizing polypyrrole in a polyurethane matrix. Polypyrrole/polyurethane (PPY/PU) composite films containing CLO4-, BF4-or CH3-C6H4-SO3- counter ions were...
1990, 8(2): 158-164
Abstract:
A series of polymer-supported tetranuclear rhodium carbonyl cluster catalysts were prepared b the reaction of Rh4(CO)12 with several kinds of polymer supports such as crosslinked poly (N-vinylpyrrolidone) (PNVP) and crosslinked poly ( styrene-co-male...
A series of polymer-supported tetranuclear rhodium carbonyl cluster catalysts were prepared b the reaction of Rh4(CO)12 with several kinds of polymer supports such as crosslinked poly (N-vinylpyrrolidone) (PNVP) and crosslinked poly ( styrene-co-male...
1990, 8(2): 165-169
Abstract:
Surface modification of nucle-microporous membrane by plasma polymerization of HEMA, NVP and D4 has been studied. The hydrophilicity of membranes was increased with increasing of plasma polymerization time of hydrophilic monomers HEMA and NVP. The fl...
Surface modification of nucle-microporous membrane by plasma polymerization of HEMA, NVP and D4 has been studied. The hydrophilicity of membranes was increased with increasing of plasma polymerization time of hydrophilic monomers HEMA and NVP. The fl...
1990, 8(2): 170-176
Abstract:
The initiation mechanism of the copolymerization of 2-vinylnaphthalene with maleic anhydride was studied under irradiation of 365 nm. The excited complex was formed from (1) the local excitation of 2-vinylnaphthalene followed by the charge-transfer i...
The initiation mechanism of the copolymerization of 2-vinylnaphthalene with maleic anhydride was studied under irradiation of 365 nm. The excited complex was formed from (1) the local excitation of 2-vinylnaphthalene followed by the charge-transfer i...
1990, 8(2): 177-182
Abstract:
The polymerization kinetics of 4, 4′-biphenyldicarbonitrile using cuprous chloride-zinc system as catatyst was investigated. the concentration of unreacted cyano group was measured by infrared spectroscopic analysis using potassium ferricyanide as th...
The polymerization kinetics of 4, 4′-biphenyldicarbonitrile using cuprous chloride-zinc system as catatyst was investigated. the concentration of unreacted cyano group was measured by infrared spectroscopic analysis using potassium ferricyanide as th...
1990, 8(2): 183-187
Abstract:
Epoxy resins toughened with carboxyl-terminated butadieneacrylonitrile copolymers (CTBN) are two-phase thermosets. The network of the in situ formed rubber particles depends upon the curing mechanism of the resin. When a primary polyamine such as tri...
Epoxy resins toughened with carboxyl-terminated butadieneacrylonitrile copolymers (CTBN) are two-phase thermosets. The network of the in situ formed rubber particles depends upon the curing mechanism of the resin. When a primary polyamine such as tri...
1990, 8(2): 188-195
Abstract:
The polymerization of methyl methacrylate (MMA) initiated by organic peroxide and polymerizable aromatic tertiary amine such as N, N-di (2-α-methylacryloyloxy propyl)-p-toluidine (MP)2PT binary system has been studied. It was found that the (MP)2PT p...
The polymerization of methyl methacrylate (MMA) initiated by organic peroxide and polymerizable aromatic tertiary amine such as N, N-di (2-α-methylacryloyloxy propyl)-p-toluidine (MP)2PT binary system has been studied. It was found that the (MP)2PT p...
