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Samenvatting Polymerisatievezels

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Samenvatting van 6 pagina's voor het vak Vezelkennis aan de HoGent (Polymerisatievezels)

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  • June 21, 2022
  • 6
  • 2021/2022
  • Summary
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LES 9 -
POLYMERISATIEVEZELS: PAC,
MAC, PVC, PP EN PE

PAC= polyacryl

MAC= modacryl
PVC= polyvinylchloride
PP= polypropyleen
PE= polyethyleen




Polacrylnitril
Bereiding van polyacryl/modacryl
Bereiding van het monomeer acrylnitril of vinylcyanide: Waterstofcyanide + ethyn
(=acetyleen)

Acrylnitril laten polymeriseren tot PAN → slechte aanverfbaarheid → lost moeilijk op

Copolymeriseren

Naamgeving:
>85% acrylnitrilmonomeren → PAC
35-85% acrylnitrilmonomeren → MAC (betere eigenschappen)


Uitspinnen van het filament
Polyacryl is geen thermoplastische grondstof: kan dus niet gesmolten worden, wel
opgelost




LES 9 - POLYMERISATIEVEZELS: PAC, MAC, PVC, PP EN PE 1

, PAC= oplossen in DMF en natspinnen

MAC= oplossen in aceton en droogspinnen

Nabehandelingen:

Verstrekken

Textureren

Snijden tot stapelvezels




Toepassingen van PAC en MAC
sokken

breigoed (warmte, zach)

blends met wol

textiel voor tuinmeubelen (UV!)

berschermkledij (zuren)

dekens (licht en warm)


Eigenschappen van polyacryl en modacryl
Sterkte ~ Co: 30 cN/tex: basissterkte, pillinggevaar, niet schuurbestendig

Elasticiteit/kreukherstellendheid: grote elasticiteit, kreukherstellend

Warmte-isolerend vermogen: houdt heel goed warmte, gelijkaardig aan wol maar
minder zwaar

Hittebestendigheid: niet zeer hittebestendig, strijken op lage temperatuur

Alkalibestendigheid: goed voor zwakke alkalien, maar niet voor merceriseren

Chloorbestendigheid: goed

Zuurbestendigheid: zéér goed

Lichtbestendigheid: perfect, beste vezel!!

Vochtopnemend vermogen: matig, kan wel aangeverfd worden


LES 9 - POLYMERISATIEVEZELS: PAC, MAC, PVC, PP EN PE 2

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