Cellulose ethers mapolymer akagadzirwa kubva ku cellulose yechisikigo uye akagadziriswa nemakemikari. Cellulose ether inobva ku cellulose yechisikigo. Kusiyana nemapolymer akagadzirwa, kugadzirwa kwe cellulose ether kunobva ku cellulose, chinhu chakakosha, musanganiswa wepolymer wechisikigo. Nekuda kwehunhu hwe cellulose yechisikigo, cellulose pachayo haina kugona kuita ne etherizing agents. Zvisinei, mushure mekurapa zvinonyungudutsa, hydrogen bonds yakasimba pakati nepakati pemaketani emamorekuru inoparadzwa, uye basa re hydroxyl group rinoburitswa mu alkali cellulose nekukwanisa kuita reaction, uye mushure me reaction ye etherizing agent, boka re OH rinoshandurwa kuita boka re OR kuti riwane cellulose ether.
Cellulose ethers dzine simba rinooneka rekupinda mumhepo pazvinhu zvitsva zvakasanganiswa nesimende. Cellulose ethers dzine mapoka ehydrophilic (hydroxyl, ether) uye hydrophobic (methyl, glucose ring) uye ma surfactants ane basa repamusoro uye nekudaro ane simba rekupinda mumhepo. Simba rekupinda mumhepo re cellulose ether richaburitsa "bhora", iro rinogona kuvandudza mashandiro ebasa rezvinhu zvitsva, zvakaita sekuwedzera plasticity uye kutsetseka kwemortar panguva yekushanda, izvo zvinobatsira pakupararira kwemortar; zvichavandudzawo goho remortar uye kuderedza mutengo wekugadzira mortar; zvisinei, zvichawedzera porosity yezvinhu zvakaoma uye kuderedza simba razvo uye elastic modulus, nezvimwewo. Hunhu hwemakanika.
Sechinhu chinoita kuti zvinhu zvisashande zvakanaka, cellulose ether ine simba rekunyorovesa kana kunyorovesa pazvimedu zvesimende, izvo pamwe chete nekushanda kwayo kwemhepo kunowedzera kuyerera kwezvinhu zvinosimbisa, asi kukora kwayo kunoderedza kuyerera, uye kushanda kwe cellulose ether pakuyerera kwezvinhu zvinosimbisa kusanganiswa kwekuita purasitiki nekukora. Kazhinji, kana huwandu hwe cellulose ether hwakaderera, hunonyanya kuratidza kushanda kwe plasticization kana kudzikira kwemvura; kana huwandu hwacho hwakakwira, kukora kwe cellulose ether kunowedzera nekukurumidza, uye kushanda kwayo kwemhepo kunowanzo zara, saka inoratidza kushanda kwekuwedzera kana kuwedzera kudiwa kwemvura.
Nguva yekutumira: Kubvumbi-24-2022