Igama lemveliso:i-polyurethane

Isakhiwo seMveliso yeMolekyuli:

Iipropathi zeekhemikhali:

I-Polyredthanes yaveliswa kuqala kwaye yaphandwa nguGqr. Otto Bayer ngo-1937. I-Polyurethane yi-polymer apho iyunithi ephindayo iqulethe i-urethane mois. I-Urethanes zikhuphe ii-carbamic acids ezikhoyo kuphela ngohlobo lwazo [15]. Inzuzo enkulu ye-PU kukuba i-chain ayiqhiwuli kuphela i-atom yekhabhoni kodwa ye-heteroatom, ioksijini, ikharbon kunye nenitrogen [4]. Kwizicelo zemizi-mveliso, i-polyhyddroxyl isetyenzisiwe. Ngokufanayo, ukusebenza kwe-nitrogen Ngokutshintsha kunye nokwahluka i-polyhydroxdl kunye ne-nitrogen witrogen ye-nitrogen, eyahlukileyo ye-pus ingahambelani [15]. I-polyester okanye i-polyether i-resistins enee-hydroxyl amaqela asetyenziselwa ukuvelisa i-polyeether Polyerther-pu, ngokwahlukeneyo [6]. Umahluko kwinani lokufakwa endaweni kunye nesithuba phakathi kwaye ngaphakathi kweetayile zesebeveza i-pus isuka kwi-pus isuka kwilayini egxunyekwe kwaye iyi-9EIGED. I-gener pus isetyenziselwa ukwenziwa kweentsizi kwaye kubumba [6]. I-pus eguquguqukayo isetyenziswa ekuvelisweni kweearhente zokubopha kunye neengubo [5]. Ukuguquguquka kunye nokugqobhoza iiplasitiki zeplastiki, ezenza uninzi lwe-pus ezivelisiweyo, zinokufumaneka ngeendlela ezahlukeneyo kwishishini [7]. Sebenzisa oonobumba abaphantsi kwemolekyuli, i-copolymers eyahlukeneyo inokuthi iveliswe. Iqela lesiphelo se-Hydroxyl livumela iibhloko zokutshintsha, ezibizwa ngokuba zingamacandelo, zifakwe kwikhonkco le-pu. Ukwahluka kwezi zigqiphu kuphumela kwiidigri ezahlukeneyo zamandla e-thensile kunye nexesha elide. Iibhloko zibonelela ngenqanaba le-crystalline kwaye liqulathe i-chein Abo bavelisa isigaba se-Amorbery iSigaba seRubberary kwaye sine-polyester / polyetere ibizwa ngokuba zizinto ezithambileyo. Ngokuthengisa kwezorhwebo, ezi polirs zebhloko zaziwa ngokuba yi-up

Isicelo:

I-PolyUrethane eguquguqukayo ikakhulu yindawo enobume be-thermoplastity, enokuzinzo ezingcono, ukungavisisani kwemichiza, ukomelela kunye nomahluko we-PVC, ngomahluko omncinci. Inobushushu obulungileyo obufudumeleyo, ukufudumala okuvakalayo, ukumelana nokothusayo kunye neepropathi eziyityhefu. Ke ngoko, isetyenziswe njengokupakisha, ukufuduswa kwesandi kunye nezinto zokucoca. Iplastiki yeProlyrethane i-Polyredthane kukukhanya, ukufuduswa kwesandi, ukufudumala okuphakathi, ukunganyangeki kweekhemikhali, izinto ezilungileyo zombane, ukuqhubekeka ngokulula, kunye nokuthathwa kwamanzi ngokulula. Isetyenziswa ikakhulu njengemithombo yolwakhiwo, inqwelo-mafutha, ishishini lokuhamba ngeenqwelo moya, ukugcinwa kobushushu kunye nokufakelwa kobushushu. I-PolyUridthane Elastoment phakathi kweplastiki kunye nerabha, ukumelana kweoyile, ukunxiba ukunganyangeki, ukumelana nobushushu obungaphantsi, ukunganyangeki okukhulu, ubunzima obuphezulu, ubunzima obuphezulu. Isetyenziswa ikakhulu kwishishini lezihlangu kunye neshishini lonyango. I-Polyreurthane inokwenziwa kwakhona kwimihlambi, iingubo, isikhumba sokwenziwa, njl.