聚丙烯酰胺理化性质总结.docx

聚丙烯酰胺理化性质总结

1、Polyacrylamide

1.1Chemicalpropertiesofpolyacrylamide

Polyacrylamideisveryresistanttoheat,anditssolidformsoftensatatemperatureof220to230degreesCelsius,anditssolutiondecomposessignificantlyonlyatatemperaturehigherthan110degreesCelsius.

Thissubstanceisinsolubleinbenzene,toluene,xylene,gasoline,kerosene,dieselfuel,butitissolubleinwaterandreactswithalkaliswithpartialhydrolysis.

1.2Physicalpropertiesof?polyacrylamide

Solubilityinwater:withrapidmechanicalstirring,thismaterialiseasilysolubleincoldwaterandformsaclearviscoussolution.Anincreaseintemperaturedoesnotaffectitssolubilityandonlyincreasestheconcentrationofviscosity.

Stability:Thispolymerhasmoderatemoistureabsorptionandifitisnotexposedtohightemperature,itspowdercanbestoredforalongtime.Inthesolutionstate,whenitsconcentrationismorethan17%,itcanbestoredformorethanayearwithoutasignificantchangeinviscosity.ThissubstancehasgoodstabilityinthepHrangebetween3and9,andathighpH,itsviscositygraduallyincreases.

Toxicity:Thesubstanceitselfisnon-toxic,butifitcontainspolymerizedmonomers(adoublebond),itwillbetoxictohumans.Forthisreason,afterfinishingitspreparation,acertainamountofsodiumbicarbonateshouldbeaddedtoittodestroytheremainingmonomers.

2、《Water-solublesyntheticpolymers》

PolyacrylamideSolubility

PolymerizedatpH9orabovePolymerswatersolubleMolyneux1984;Hills1985.

PolymerizedatpH2.5orbelowPolymersnotwatersolubleMolyneux1984;Hills1985.

Cross-linkedformPolymersnotwatersoluble,butwaterswollen.

3、《现代化妆品科学与技术》

聚丙烯酰胺，或丙烯酸羟乙酯/丙烯酰二甲基牛磺酸钠共聚物亦是一种好的选择，这些物质在低pH有良好的增稠特性。烫发和直发剂pH在12以上和含有大量的电解质，可选用对这些条件容忍度高的丙烯酸(酯)类/硬脂醇聚醚-20甲基丙烯酸酯共聚物。