Nylon thiab PTFE yog manmade hluavtaws polymers uas tau siv dav hauv kev lag luam polymer.Nylon yog polyamide thiab polymer yog fluoro polymer.Ob leeg muaj qhov hnyav molecular thiab lawv yog cov thermoplastics.PTFEyog dej phobic, chemically tsawg reactive khoom nrog ib tug high hluav taws xob conductivity, thiab ib tug tsawg coefficient ntawm kev sib txhuam.Nylon yog cov khoom siv silky thiab nws yog lwm txoj hauv kev rau cov hlau thiab tsis yog hlau, suav nrog tooj dag, tooj liab, ntoo, yas, thiab roj hmab.
Nylon yog dab tsi
Nylon yog ib qho aliphatic polymer, polyamide uas tau siv dav hauv ntau lub lag luam.Nylons yog cov thermoplastics.Nws yog siv los ua cov kabmob, nrog rau cov khoom hnav.Kev siv nylon feem ntau yog hloov pauv rau tooj liab, tooj dag, hlau, thiab txhuas.Tsis tas li ntawd, nws tuaj yeem siv los ua lwm yam khoom siv rau ntoo, yas, thiab roj hmab ib yam nkaus.
Nylon yog cov khoom siv silky uas yog thawj zaug tsim los ntawm Wallace Carothers hauv xyoo 1935. Nylons yog tsim los ntawm cov tshuaj tiv thaiv ntawm hexamethylenediamine nrog adicarboxylic acid (1: 1 ratio) nyob rau hauv muaj dej, nyob rau hauv lub reactor.
cov
Nylon fibers yog siv los tsim cov ntaub thaiv nkauj nyab, cov hlua hauv cov cuab yeej suab paj nruag, ntaub pua plag, kav dej, tsev pheeb suab, thiab cov khoom siv khaub ncaws.Cov ntaub ntawv ntawm nylon kuj tseem siv rau hauv qee qhov kev lag luam los tsim cov combs thiab cov khoom siv kho tshuab nrog rau cov iav thiab tshuab screws.Extrusion, casting, thiab txhaj tshuaj molding yog cov txheej txheem siv los tsim engineering qib nylons.
PTFE yog dab tsi?
PTFE yog ib qho hluavtaws fluoropolymer uas tseem hu ua polytetrafluoroethylene (PTFE).Nws yog ib qho khoom siv yuam kev los ntawm Dupont chemist, Dr. Roy Plunkett hauv xyoo 1960, thaum nws tab tom ua haujlwm nrhiav lwm yam khoom siv los ua kom txias.
cov
Nws muaj ntau yam kev lag luam siv vim nws lub cev thiab tshuaj lom neeg tshwj xeeb.Nws yog cov khoom siv hydrophobic.Yog li ntawd, tsis muaj dej los yog cov kev daws teeb meem uas muaj dej tuaj yeem ntub cov khoom siv polymer.polymer yog dav siv nyob rau hauv tsis-stick ua noj lauj kaub ua ib txheej.Qhov no kuj yog siv los ua cov roj nplua nyeem vim nws txo cov kev sib txhuam.Cov qauv kev sib txuas ntawm PTFE yog qhov ruaj khov heev;Yog li ntawd, nws muaj cov tshuaj tsis tshua muaj tshuaj reactivity thiab kub kub taw tes.Tsis tas li ntawd, nws muaj cov khoom siv hluav taws xob zoo.polymer yog cov khoom siv thermoplastic, uas txhais tau hais tias nws cov khoom hloov pauv thaum nws sov lossis txias.PTFE muaj tag nrho cov khoom siv no vim nws cov qauv molecular.
Qhov txawv ntawm Nylon thiab PTFE yog dab tsi?
• Cov tshuaj muaj nyob rau hauv nylon polymer yog Carbon, Hydrogen, Oxygen, thiab Nitrogen.Polymer tsuas muaj Carbon thiab fluorine xwb.
• Ob leeg nylon thiab PTFE muaj intramolecular rog, qhov uas cov nylon yog "hydrogen bonds" thiab cov polymer yog "London dispersion rog."
• Cov monomer (repeating unit) ntawm nylon yog (-NH-[CH2]5-CO-) thiab PTFE yog (-F2-CC-F2).
• Nylon yog cov khoom siv hydrophilic thaum PTFE yog cov khoom siv hydrophobic.
PS: Tiv tauj peb rau PTFE cov khoom tiav cov qauv dawb
Post lub sij hawm: May-14-2017