Tambayoyi Misali Game da Yin Amfani da Polymerization na Danshi
Tsarin polymerization na condensation wani nau'in polymerization ne wanda ke samar da polymers ta hanyar haɗa monomers ta hanyar kawar da ƙananan ƙwayoyin halitta, kamar ruwa, methanol, ko HCl. Wannan tsari yana taka muhimmiyar rawa wajen haɗa kayan polymer daban-daban da ake amfani da su a rayuwar yau da kullun. A cikin wannan labarin, za mu bincika misalai kuma mu tattauna tsarin polymerization na condensation don zurfafa fahimtarmu game da wannan ra'ayi.
Gabatarwa ga Tsarin Daidaito
Kafin mu zurfafa cikin tambayoyin, bari mu yi nazari sosai kan polymerization na condensation. Polymerization na condensation shine tsarin samuwar polymer ta hanyar amsawar monomers guda biyu ko fiye waɗanda ke ɗauke da ƙungiyoyi masu aiki, yawanci tare da kawar da ƙananan ƙwayoyin halitta kamar ruwa a matsayin samfurin da ya biyo baya. Polymer da aka samu yana da nauyin ƙwayoyin halitta mafi girma fiye da monomers. Misalan gama gari na polymerization na condensation sune samuwar polyesters da polyamides.
Misalan Polymers daga Condensation Polymerization
1. Polyester: An samar da shi ne daga martanin terephthalic acid (benzene-dicarboxylate) tare da ethylene glycol. Misalin samfurin: PET (polyethylene terephthalate).
2. Polyamide (Nylon): An samar da shi ne daga amsawar adipic acid tare da hexamethylene diamine. Misali samfurin: Nylon-66.
3. Polycarbonate: An samar da shi ne daga martanin da ke tsakanin bisphenol A da phosgene.
Tambayoyi Misali Game da Yin Amfani da Polymerization na Danshi
Ga wasu misalai na tambayoyi da tattaunawa waɗanda zasu iya taimaka muku fahimtar tsarin polymerization na condensation.
Tambaya ta 1: Samar da Polyester
Tambaya: Bayyana yadda sinadaran polyester ke fitowa daga ethylene glycol da terephthalic acid. Zana tsarin sinadaran polymer da aka samar sannan a ƙididdige nauyin kwayoyin halitta na ƙaramin ɓangaren polymer.
Tattaunawa:
Ana samar da polyester ta hanyar haɗakar sinadarai tsakanin ethylene glycol (CH₂OH-CH₂OH) da terephthalic acid (C₆H₄(COOH)₂).
Za a iya rubuta wannan amsawar samuwar kamar haka:
\[ n \, (\text{CH}_2\text{OH-CH}_2\text{OH}) + n \, (\text{C}_6\text{H}_4(\text{COOH})_2) \rightarrow (\text{O}-\text{C}_6\text{H}_4-\text{COO}-\text{CH}_2-\text{CH}_2-\text{O})_n + 2n\, \text{H}_2\text{O} \]
Samuwar wannan polyester yana samar da ruwa a matsayin wani abu da ya rage. Domin tantance tsarin asali na polyester, muna buƙatar duba ɓangaren da ke maimaita sarkar polymer:
Tsarin asali na PET (Polyethylene Terephthalate):
\[
\text{-O-}\text{C}_6\text{H}_4\text{-COO-CH}_2\text{-CH}_2\text{-}
\]
Ana iya ƙididdige nauyin kwayoyin halitta na ƙaramin sashin polyester kamar haka:
– Yawan kwayoyin halitta na -CH₂-CH₂-O- (ethylene glycol ba tare da H₂O ba): 60 g/mol
– Nauyin kwayoyin halitta na -COO- (ƙungiyar ester): 44 g/mol
– Nauyin kwayoyin halitta na C₆H₄ (benzene ba tare da H₂O ba): 76 g/mol
Jimlar yawan ƙwayoyin halitta na ƙananan sassa:
\[
60 + 44 + 76 = 180 \, \text{g/mol}
\]
Tambaya ta 2: Samar da Polyamide (Nylon-6,6)
Tambaya: Bayyana tsarin samar da Nylon-6,6 ta hanyar haɗakar sinadarin adipic acid da hexamethylene diamine. Haɗa tsarin na'urar Nylon-6,6 kuma ku ƙididdige nauyin ƙwayoyin halitta na ƙaramin na'urar.
Tattaunawa:
Ana samar da nailan-6,6 daga wani abu da ke hade da adipic acid (HOOC-(CH₂)₄-COOH) da hexamethylene diamine (H₂N-(CH₂)₆-NH₂).
Amsar samuwar ita ce:
\[ n \, (\rubutu {HOOC-(CH}_2\rubutu{)}_4\rubutu{-COOH}) + n \, (\rubutu {H}_2\rubutu{N-(CH}_2\rubutu{)}_6\rubutu{-NH}_2) \dama arrow (\rubutu{-NH-(CH}_2\rubutu{)}_6\rubutu{-NH-CO-(CH}_2\rubutu{)}_4\rubutu{-CO-})_n + 2n \, \rubutu{H}_2\rubutu{O} \]
Tsarin asali na Nailan-6,6:
\[
\text{-NH-(CH}_2\text{)}_6\text{-NH-CO-(CH}_2\text{)}_4\text{-CO-}
\]
Nauyin kwayoyin halitta na ƙaramin naúrar:
– Yawan kwayoyin halitta na -NH-(CH₂)₆-NH- (hexamethylene diamine rabe da H₂O): 114 g/mol
– Yawan kwayoyin halitta na -CO-(CH₂)₄-CO- (adipic acid ba tare da H₂O ba): 142 g/mol
Jimlar yawan ƙwayoyin halitta na ƙananan sassa:
\[
114 + 142 = 256 \, \text{g/mol}
\]
Tambaya ta 3: Polycarbonate
Tambaya: Ta yaya amsawar bisphenol A da phosgene ke samar da polycarbonate? Zana tsarin asali na polycarbonate kuma ku ƙididdige nauyin kwayoyin halitta na ƙaramin naúrar.
Tattaunawa:
Ana samun Polycarbonate ta hanyar amsawar da ke tsakanin bisphenol A (C₁₅H₁₆O₂) da phosgene (COCl₂).
Za a iya rubuta martanin samuwar kamar haka:
n + 2n \, \text{HCl} \]
Tsarin asali na polycarbonate:
\[
\text{-O-CO-OC}_6\text{H}_4\text{C}(\text{CH}_3)_2\text{C}_6\text{H}_4\text{O}-
\]
Nauyin kwayoyin halitta na ƙaramin naúrar:
– Nauyin kwayoyin halitta na C₆H₄-C(CH₃)₂-C₆H₄ (bisphenol A ba tare da H₂O ba): 224 g/mol
– Nauyin kwayoyin halitta na -COO-: 28 g/mol
Jimlar yawan ƙwayoyin halitta na ƙananan sassa:
\[
224 + 28 = 252 \, \text{g/mol}
\]
Kammalawa
A cikin wannan labarin, mun tattauna manufar polymerization na condensation, wanda ya ƙunshi halayen asali da tsarin wasu sanannun polymers da wannan tsari ya samar. Ta hanyar samar da misalai da tattaunawa, wannan labarin yana da nufin fayyace yadda waɗannan halayen ke aiki da kuma yadda za mu iya ƙididdige yawan ƙwayoyin halitta na ƙananan raka'a a cikin sarkar polymer. Fahimtar polymerization na condensation yana da mahimmanci saboda wannan tsari ana amfani da shi sosai a masana'antu don ƙirƙirar nau'ikan kayayyaki iri-iri tare da halaye na musamman da aikace-aikace iri-iri.
