Iindlela zokuphucula iiPropati zePVC-Indima yezongezo.

I-resin ye-PVC efunyenwe kwi-polymerization ayizinzanga kakhulu ngenxa yozinzo oluphantsi lwe-thermal kunye ne-viscosity ephezulu yokunyibilika. Kufuneka iguqulwe phambi kokuba iqhutywe kwiimveliso ezigqityiweyo. Iipropathi zayo zinokuphuculwa / ziguqulwe ngokongeza izongezelelo ezininzi, ezinje ngezizinzisi zobushushu, i-UV stabilizers, iiplasticizers, i-effect modifiers, fillers, flame retardants, pigments, njl.

Ukukhethwa kwezi zongezo zokuphucula iipropathi zepolymer kuxhomekeke kwimfuno yesicelo sokuphela. Umzekelo:

I-1.Plasticizers (i-Phthalates, i-Adipates, i-Trimellitate, njl.) zisetyenziswa njengee-agent zokuthambisa ukunyusa i-rheological kunye nokusebenza komatshini (ukuqina, ukomelela) kweemveliso ze-vinyl ngokunyusa ubushushu. Izinto ezichaphazela ukukhethwa kweeplasticizers zevinyl polymer zezi:Polymer ukuhambelana; low Volatility; ixabiso.

I-2.PVC inozinzo oluphantsi kakhulu lwe-thermal kunye ne-stabilizers inceda ukuthintela ukuthotywa kwe-polymer ngexesha lokucubungula okanye ukuvezwa kokukhanya. Xa ziphantsi kobushushu, iikhompawundi zeVinyl ziqalisa i-self-accelerating dehydrochlorination reaction kwaye ezi zinzisi zinciphisa iHCl eveliswayo ephucula ubomi bepolymer. Izinto ekufuneka ziqwalaselwe ngelixa kukhethwa ukuzinzisa ubushushu zezi: iimfuno zobugcisa; ukuVunywa kolawulo; iindleko.

I-3.Fillers zongezwa kwii-PVC compounds ngenxa yezizathu ezahlukeneyo. Namhlanje, isigcwalisi sinokuba sisongezo sentsebenzo yokwenyani ngokuzisa ixabiso ngeendlela ezintsha nezinika umdla ngelona xabiso lisezantsi lokuqulunqa. Ziyanceda: ukwandisa ukuqina kunye namandla, ukuphucula ukusebenza kwempembelelo, ukongeza umbala, ukukhanya kunye nokuhamba kunye nokunye.

I-calcium carbonate, i-titanium dioxide, i-calcined clay, iglasi, i-talc njl.

4.Izithambiso zangaphandle zisetyenziselwa ukuncedisa indlela egudileyo yePVC yokunyibilika ngokusebenzisa izixhobo zokusebenza. ngelixa izithambisi zangaphakathi zinciphisa i-viscosity enyibilikayo, zithintela ukushisa kunye nokuqinisekisa umbala omhle wemveliso.

5.Ezinye izongezo ezifana nezincedisi zokusetyenzwa, izilungisi zempembelelo, zongezwa ukuphucula oomatshini kunye neempawu zomphezulu wePVC.