摘要:
A process for forming a polyarylenethioether stretched blow molded vessel, by a modified blow molding of a substantially linear polyarylenethioether having a melt viscosity of 3,000 to 20,000 poise [at 310.degree. C., shear rate=200 sec.sup.-1 ]. The modified blow molding involves injecting the polymer in a mold to form a bottomed parison, stretching the bottomed parison along its axis by means of a rod or mandrel, and the stretched bottomed parison is then subjected to blow molding to effect lateral stretching. The blow parison is then heat set.
摘要:
A para-phenylene sulfide block copolymer consisting essentially of a recurring unit (A) ##STR1## and a recurring unit (B) ##STR2## said recurring units (A) being present in the form of a block of 20 to 5,000 units of (A) on the average in the molecular chain, the mol fraction of the recurring units (A) being in the range of 0.50 to 0.98, the block copolymer having a melt viscosity (.eta.*) of 50 to 100,000 poise as determined at 310.degree. C. at a shear rate of 200 sec.sup.-1 and having: (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C., (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer, which block copolymer is preferably produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR3## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR4##
摘要:
Novel polyarylenesulfide complexes are obtained by reacting a polyarylenesulfide with 0.05 to 20 mols of at least one strongly basic metal compound per 100 mols of arylenesulfide groups contained in the polyarylenesulfide under a uniformly dispersed condition, and have the properties defined in the following (A) through (C):(A) .eta.*/.eta..sub.0 *=3 to 100, wherein the .eta.* and .eta..sub.0 * stand for melt viscosities of the complex and the starting polyarylenesulfide, respectively;(B) .DELTA.T.sub.c2 =(T.sub.c2).sub.0 -T.sub.c2 =10 to 100.degree. C., wherein T.sub.c2 and (T.sub.c2).sub.0 stand for crystallization temperaturs of the complex and the starting polyarylenesulfide, respectively, observed when the polyarylenesulfide is cooled from its moten state; and(C) .DELTA.(.DELTA.E)=.DELTA.E-(.DELTA.E).sub.0 =5 to 75 kcal/mol, wherein .DELTA.E and (.DELTA.E).sub.0 stand for apparent flow activation energies of the complex and the starting polyarylenesulfide, respectively.The polyarylenesulfide complexes have higher melt viscosity with improved flow characteristics.
摘要:
Corrosion of a melt-processing apparatus for processing a polyarylene thioether at a temperature higher than the melting point thereof is prevented by a method which comprises adding to 100 parts by weight of the polyarylene thioether 0.001 to 10 parts by weight of at least one member selected from the group consisting of (i) hydroxides of metals of the group IIa of the Periodic Table, (ii) oxides of metals of the group IIa of the Periodic Table and (iii) aromatic carboxylic acid salts of metals of the group IIa of the Periodic Table.By this method, even if the melt-processing article obtained is exposed to moisture, the electrical properties of the article formed (for example, insulation characteristics) and the water resistance are not substantially deteriorated.
摘要:
A para-phenylene sulfide block copolymer consisting essentially of a recurring unit (A) ##STR1## and a recurring unit (B) ##STR2## said recurring units (A) being present in the form of a block of 20 to 5,000 units of (A) on the average in the molecular chain, the mol fraction of the recurring units (A) being in the range of 0.50 to 0.98, the block copolymer having a melt viscosity (.eta.*) of 50 to 100,000 poise as determined at 310.degree. C. at a shear rate of 200 sec.sup.-1 and having: (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C., (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer, which block copolymer is preferably produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (e) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR3## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide an an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR4##
摘要:
Disclosed herein are poly(arylene thioether-ketone) fibers obtained by melt-spinning a thermoplastic material which comprises 100 parts by weight of a melt-stable poly(arylene thioether-ketone) (PTK) and optionally, up to 50 parts by weight of at least one of thermoplastic resins. The PTK has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- are in the para position to each other, and has a melting point, Tm of 310.degree.-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid. The PTK fibers of this invention have high heat resistance and strength.
摘要:
A polyarylenethioether primary melt formed article having a Hunter whiteness higher than 30% and a parallel light transmittance Tp higher than 60%, as measured for a sheet with a thickness of 0.3 mm, at the process for obtaining the article which comprises producing a polyarylenethioether according to the polymerization reaction comprising a dehalogenation/sulfidization reaction between an alkali metal sulfide and a dihaloaromatic compound in a polar organic solvent by carrying out the reaction with the addition of an effective amount of a halo-substituted organic compound to obtain a stabilized polyarylenethioether, and then subjecting the polyarylenethioether to melt extrusion. The melt formed article thus produced can be subjected to further melt processing to produce a secondary melt formed article or structure of polyarylenethioether.
摘要:
Disclosed herein is a stretched poly(arylene thioether-ketone) film made of a thermoplastic material which comprises (A) 100 parts by weight of a melt-stable poly(arylene thioether-ketone) having predominant recurring units of the formula ##STR1## and having a melting point, Tm of 310.degree.-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g and a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sufuric acid; and optionally, (B) up to 100 parts by weight of at least one of thermoplastic resins and/or up to 15 parts by weight of at least one of fillers. Its production process is also disclosed.
摘要:
Disclosed herein is a melt-stable poly(arylene thioether-ketone) composition, which comprises:(A) 100 parts by weight of a melt-stable poly(arylene thioether-ketone) having predominant recurring units of the formula ##STR1## and having a melting point, Tm of 310.degree.-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C. and a reduced viscosity of 0.2-2 dl/g;(B) 0-400 parts by weight of at least one of thermoplastic resins; and(C) at least one of fibrous fillers and/or at least one of inorganic fillers in a proportion of 0-400 parts by weight per 100 parts by weight of the sum of said components (A) and (B).At least either one of the components (B) or (C) is contained in a proportion of at least 0.1 part by weight per 100 parts by weight of the component (A).
摘要:
Disclosed herein are poly(arylene thioetherketone) fibers obtained by melt-spinning a thermoplastic material which comprises 100 parts by weight of a melt-stable poly(arylene thioether-ketone) (PTK) and optionally, up to 50 parts by weight of at least one of thermoplastic resins. The PTK has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- are in the para position to each other, and has a melting point, Tm of 310-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid. The PTK fibers of this invention have high heat resistance and strength.