Polycondensation ngu ai gaw, bungli galaw ai hpung lahkawng (sh) dai hta jan ai hpung ni nga ai monomers ni langai hte langai n-gun ja ai n-gun kaba ai n-gun ni hpe byin shangun ai, molecule kaji ni hpe mung shapraw ai chemical reaction langai rai nga ai.
Polycondensation reactions hku nna organosiloxans ni hpe n-gun jaw ai lam hpe n bawngban shi yang, Si-0-Si matut mahkai lam ni hpe hpaw ya lu ai condensation reaction amyu myu hpe shawng nnan shapraw ra ai: Si-0-SI bonds ni hpe bungli galaw ai hpung langai hte langai bung ai bungli hpung ni a condensation kaw nna shapraw lu ai, ga shadawn .
Dai ni hta, R gaw methyl (sh) ethyl hku nna madung rai nga ai. Ndai bai htang ai lam ni hta, silanol a condensation reaction gaw ahkyak dik htum rai nga ai. Alkaxysilane ni a matu masa lam ni gaw grai n-gun ja ai. Madung hku nna, Lewis acid zawn re ai catalyst ni hpe jat bang ai, n-gun dat ai lam hte n-gun dat ni hpe jat bang ra ai, acetoxy hpung ni a condensation gaw 175℃hta katsi ai shaloi she byin wa lu ai. Si{5}}}} Si matut mahkai lam hpe n bung ai hkum hkrang daw ni a bungli galaw ai hpung ni a lapran na shada da n-gun jaw ai lam ni a majaw byin pru wa lu ai. N bung ai magam bungli hpung ni a common condensation reactions ni hta lawu na amyu ni lawm ai:
Dai ni hta R gaw methyl (sh) ethyl hku nna, M gaw magri langai mi re. Ndai hkam sha lam ni kaw nna, silanol gaw shanhte a lapran hta grau nna shamu shamawt nga ai bungli galaw hpung re ai hpe mu lu ai, dai hpung ni gaw chlorosilene, alkoxysilane, etc.