Hydroxypropyl methyl Cellulose HPMC est a non-Ionic Cellulose mixto Ather in varietate et Ionic Methyl carboxymethyl cellulosis mixto aether, non agere cum gravibus metalla. Unum oxygeni radicalis propter hydroxypropyl methyl cellulosis contentus et alia proportione hydroxypropyl contentus et viscositas, factus est distincta varietates in perficientur, ut High Metthoxyl et humilis contentus de hydroxypropyl varietates et humilis ad Methyl Content et High Content of Hydroxypropyl varietates et suus 'perficientur est prope ad hydroxypropyl Methyl Cellulose est produci. Sed in singulis variis, quamvis non habet parvum tantum hydroxypropyl aut parva moles Mthoxy, solubility in organicis solvents aut Floroculation temperatus aqueous solutio, est magna differentia.
I, hydroxypropyl Methyl Cellulose solubility
Hydroxypropyl methyl cellulosose in aqua solubility of hydroxypropyl Methyl cellulosis est actu quaedam propylene cadmiae (Methyl oxypropyl anulum) modificatio METHYLESTIBUS frigus aqua solutum et calida aqua insolubilis. Tamen, in gelaer temperatus modified hydroxy propyl est multo altius quam de Methyl Cellulose calida aqua. Eg Viscositas hydroxypropyl methylcellulose aqueum solutio cum II% Mthoxy Content Ds = 0.73 et hydroxypropyl contentus MS = 0.46 est D MPa ad XX ℃. De gel temperatus s scriptor productum est prope C ℃, cum autem de methyl Cellulose eiusdem temperatus est solum circa LV ℃. Sicut in solubility in aquam, etiam valde melius, exempli gratia, post machinam de hydroxypropyl Methylcellulose (Frumentum figura 0,2 ~ 0.5mm ad XX ℃ IV% aqueum Viscosity in aquam sine refrigerationem ad locus temperatus in aqua sine refrigerationem ad locus temperatus .
(II) Hydroxypropyl Methyl Cellulose in Organic Solvents solubility of Hydroxypropyl Methyl Cellulose in organicum solvents solubility, est etiam melius quam methyly substitutionis gradum 2.1 aut magis products, et habet hydroxypropyl DS = 0.2 ~ 1.0, princeps viscositas hydroxypropyl methyl cellulosis cum totalis substitutione gradu super 1.8 solutum in anhydrous methanolum et ethanol solutions, et thermoplastic et aqua solubility. Est etiam solutum in chlorinated hydrocarbons ut dichloromethane et trichlorthane, et organicum solvents ut acetone, isopropyl alcohol, et diacetone ipsum. Solubility in organicis solvents superior aqua solubility.
II, hydroxypropyl Methyl Cellulose viscositas influendo factores
Hydroxypropyl methylcellosa viscosity factors hydroxypropyl methylcellosa vexillum viscositas determinatio, et alia Cellulose aether est idem, sunt ad XX ℃ cum II% aqueum solution ut vexillum determinatio. Viscositas eiusdem uber, cum augmentum concentration et auget, idem concentratio diversis mocecular weight products, Molecular pondus productum est princeps viscositas. Et necessitudinem cum temperatus est similis, quod de Methyl Cellulose. Cum temperatus resurget, viscositas incipit declinare, sed cum ad quandam temperatus viscositas repente resurget et gelaing occurrit. Et gelaer temperatus products cum humilis viscositas est altior quam products cum princeps viscositas. In gradu ejus Gel punctum, praeter altum et humilis viscositas aether, sed etiam cum aetheris Metthoxy et hydroxypropyl coetus compositionem ratio et totalis gradus substitutione sunt. Sciendum quod hydroxypropyl Methylcellosus est etiam Pseudoplastic; SOLUTIO SOLUTIO STABULUM cum recondit ad locus temperatus et non ostenderet aliqua degradation of viscosity nisi ad facultatem enzymatic degradation.
III, hydroxypropyl methyl cellulosis acid et alkaline resistentia
Hydroxypropyl methylcellulose acid alkali hydroxypropyl methylcellulose acid and alkali, generally is stable, in the ph PH2~12 range is not affected, it can withstand a certain amount of light acid, such as formic acid, acetic acid, citric acid, succinic acid, phosphoric Acidum, boric acidum, etc. Sed concentrated acidum habet effectum reducendo ad viscositatem. Alkali ut caustic nitri, caustic potassium et calce aquam non effectum in ea, sed effectus paulo augendae viscositas solutionum diminutionem tardius in futurum.
IV, hydroxypropyl Methyl Cellulose potest esse mixta
Hydroxypropyl methyl cellulosis solutio potest esse mixta cum aqua-solutum polymer componit, et facti sunt uniformis transparent solutio in altioribus viscositas. These high molecular compounds are polyethylene glycol, polyvinyl acetate, polysilicone, polymethyl vinyl siloxane and hydroxyethyl cellulose and methyl cellulose, etc. Natural polymer compounds such as gum Arabic, locust bean gum, thorn tree gum and so on also have a good mixture with its SOLUTIO. Hydroxypropyl Methyl cellulosose potest etiam mixta cum stearica acidum et palmitic acidum Mannitol Ester aut sorbitol Ester, sed etiam cum Glycerol, sorbitol et Mannitol, hi componit cellulosa plasticizer.
V, hydroxypropyl Methyl Cellulose insolubilis aqua solutum
Hydroxypropyl methyl cellulosis insolubilis aqua-solutum cellulosis aether, potest esse superficiem crucem-vinculum cum aldehydes, et facere haec aqua, solutum aut praecipitatas in solution, facti insolubilis in aquis. Et fac hydroxypropyl methylcellose insolubilis aldehyde, formaldehyde, glyoxal, succaldehyde, diadeohyde, etc., in usum formaldehyde, in quo gyoxal in crux -Linking agente. Dosis huius generis crosslinking agente in solution est 0,2% ~ X% of aethere massa, optimum est VII% ~ X%, ut usum Gloxal cum 3.3% ~ VI% est maxime conveniens. Et Generalis Treatment temperatus est 0 ~ XXX ℃, tempus est I ~ 120min. Cross-vinculum reactionem indiget ferri sub acidic conditionibus. Plerumque, inorganicis acidum aut organicum carboxylic acid est additum ad solutionem ad adjust in PH de solutione de II ~ VI, potissimum inter IV ~ VI, et aldehydes sunt addita ad crucem-VI, et aldehethydes sunt additae ad crucem-VI, et aldehydes sunt addita ad crucem-VI, et aldehydes sunt addita ad crucem-VI, et aldehydes sunt addita ad crucem-VI reactionem. The acids used are hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, hydroxy acetic acid, succinic acid or citric acid, among which formic acid or acetic acid is the best, while formic acid is the best. Acida et aldehydes potest etiam addi simul ad patitur solution esse crucem, coniunctum in desideravit Phant. Hoc reactionem est saepe usus est in ultima processus of Cellulose aether praeparatio processus, ut Cellulose aether non dissolvere, facile ad XX ~ XXV ℃ aqua lavare et purificare. Cum enim uber adhibetur, alkaline substantiae potest addidit ad solutionem productum ad adjust in PH de solutione esse alkaline, et uber est cito dissolvi in solut. Hoc modum potest etiam adhiberi cum Cellulose aether solutio adhibetur ut a film et in film est tractata ad insolubilis amet.
VI, hydroxypropyl methyl cellulosis anti-enzyme
Hydroxypropyl methyl cellulosose enzyme resistentia de Cellulose derivationes in doctrina, ut quisque anhydroglucosa coetibus ut sit solidum compositum de repositoque coetibus, exesa microorganisms est minus susceptibilis ad valorem magis quam I: Etiam per enzyme degradation, hoc est descriptio cuiusque coetus in cellulosa catena substitutio gradus est uniformis, microonoms potest Erode prope unsubstituted dehydrated glucose coetibus ad formam sugars, quod potest absorbetur per microorganisms ut cibo. Ergo si Efferification substitutione gradum Cellulose augetur, resistentia cellulosis aethere ad enzymaticum exesa erit auctus. Nuntiatum est quod sub moderari conditionibus, RELICTUM Viscositas hydroxypropyl METHYL Cellulose (DS = 1.9), METHYLLOSE (DS = 1.66), et hydroxyethyl (1.7%), et hydroxyethyl (1.7%), quod 13.2%, 7.3 , 3.8% et 1,7%, respective. Hydroxypropyl methyl Cellulose habet fortis anti-enzyme facultatem. Sic hydroxypropyl methylcellosus optimum anti-enzyme, cum suis bonis dispersionem, crasso et film formationem, applicantur in EMULSIO coatings, etc., plerumque non opus est addere medicaminibus. Tamen, ut ne diu-term repono de solutione vel fieri potest contaminationem ab extra mundum, conservativa potest addidit, cuius lectio determinari potest secundum ultima requisita solution. Phenylmercuric acetate et manganese fluorilicate sunt efficax conservativa, sed sunt toxicus et debet diligenter operated. Fere, I ~ 5mg Phenylmercuric acetate potest addidit ad invicem sextarium solution.
VII, Hydroxypropyl Methyl Cellulose membrana perficientur
Hydroxypropyl Methyl Cellulose amet perficientur hydroxypropyl Methyl Cellulose habet optimum amet, et aqueum solution seu organicum solvendo solution, iactaret in speculo laminam, post siccatio fit hyalina, transparent et lenta fit in colore, transparent et lenta fit in colore, transparent et lenta fit in hyalina, transparent et lenta fit in colore, transparent et lenta fiat. Hoc est bonum humorem resistentia et manet solidum ad altum temperaturis. Ut addition of hygroscopic plasticizer, potest augendae eius elongatio et flexibilitate, ut amplio flexura, Glycerol et sorbitol et aliis plasticizer est maxime conveniens. Et generalis solution concentration est II% ~ III%, plasticizer dosis est X% ~ XX% of Cellulose aether. Si contentus de plasticizer exigatur, quod DECREMENTUM PHATomenon de Colloid siccitatibus siccitatibus fieri potest in altum humiditatem. Terle fortitudo film adiecit plasticizer multo maior quam non addidit, et crescit cum augmentum moles addidit, ut ad Hygroscity de film est etiam augeri cum incremento moles plasticizer.
Post tempus: Sep 08-2022