Naịlọn High okpomọkụ usoro nkwalite yellowing na atụmatụ nkwalite

A na-emepụta Aliphatic polyamides nke ụlọ dị iche iche n'ahịa, nke PA6, PA66, PA46, PA11 na PA12 bụ ihe kachasị mkpa.Nbibi oxidative na PA na-adabere n'ogo nke crystallinity na njupụta nke oge amorphous.Dị ka usoro ọdịnala si dị, a na-edozi polyamides aliphatic na obere nnu ọla kọpa (ihe ruru 50 ppm) jikọtara ya na ion halogen (dịka iodine na bromide ion).Ịrụ ọrụ nke usoro ihe nkwụsi ike a bụ ihe ijuanya n'ihi na a na-ewere ion ọla kọpa dị ka enyemaka ịka nká na polyolefins.A ka na-amụ usoro nke nkwụsi ike mmetụta nke ọla kọpa / halogen composite system.

Amine ndị na-esi ísì ụtọ bụ ndị na-emeziwanye LTTS, ma mgbe ejiri ya na PA, ha nwere ike ime ka mgbanwe nke polymers pụta.Phenol antioxidants nwere ike melite isi agba mgbe polycondensation na-eme ka aliphatic polyamide kwụsie ike.N'ozuzu, a na-agbakwunye antioxidant a tupu akwụsị mmeghachi omume polycondensation.

Tebụl dị n'okpuru na-atụnyere njirimara nke stabilizers dị iche iche ejiri maka polyamide aliphatic.

N'ebe okpomọkụ dị elu (dịka n'elu 150 ° C), kọpa / iodide stabilizer sistemu na-egosi nsonaazụ kacha mma.Otú ọ dị, na ọnọdụ okpomọkụ dị ala, phenolic antioxidants naanị ma ọ bụ jikọtara ya na phosphites nwere ike ịdị irè karị.Uru ọzọ nke iji phenolic antioxidants bụ na ha na-ejigide agba agba nke polypolymers ruo mgbe ịka nká nke ọma karịa ndị na-edozi nnu ọla kọpa.

Nchọpụta nke polymer mgbe ịka nká na-ekpo ọkụ adịghị ebelata n'otu n'otu na akụrụngwa ya.Ntughari nwere ike ime ọbụna n'ime oge dị mkpirikpi, ma ike na-agbanwe ike na elongation nke polymer agaghị emetụta ruo mgbe e mesịrị.

Otu nnukwu akwụkwọ na-akọwa ọtụtụ ngwa nke polyamides na-emesi ike nke iko-fiber na ụlọ ọrụ ụgbọ ala, dị ka eriri igwe, mkpuchi radiator na grilles, breeki na igwe na-ebugharị ike, ogwe aka valve, taya, kọntaktị breeki ikuku na mkpuchi.Phenolic antioxidants, ma ọ bụ naanị ya ma ọ bụ jikọtara ya na phosphite, bụ ihe ndozi kachasị mma maka GFR PA66.

Usoro ntọala nke nchikota phenol + phosphite bụ 1098+168, nke enwere ike itinye ya na obere okpomọkụ nhazi na-enweghị nkwalite, na agba extrusion na-akawanye mma.Otú ọ dị, maka usoro polyamide dị ka iko fiber akwado, nhazi okpomọkụ dị elu (ihe fọrọ nke nta ka ọ bụrụ 300 Celsius C), 168 elu okpomọkụ decomposition ọdịda, n'oge a, anyị na-ejikarị 1098 + S9228 dị otú ahụ ngwakọta nke mma okpomọkụ na-eguzogide, nke bụkwa. usoro a na-ejikarị eme ihe na nylon okpomọkụ dị elu.

Mgbe nsonaazụ nyocha usoro, achọpụtara na 1098 + S9228 ka nwere ohere maka mmelite agba nke naịlọ ọkụ dị elu, na Sarex Chemical weputara ngwaahịa kwalitere SARAFOS 2628P5 (nkwụsị inyeaka nke sitere na phosphorus) na SARANOX PA2624 (na-egbochi phenol na phosphite). Nchikota) nwere arụmọrụ ka mma na nylon na-acha odo odo na-ekpo ọkụ, yana data nyocha dị mkpa bụ ndị a:

PA66, 270°C otutu extrusion na ime achịcha na-ekpo ọkụ

Ndị Sarex Chemical Laboratory kpebiri data ndị a dị n'elu

E jiri ya tụnyere otu ihe mgbakwunye nke SARAFOS 2628P5 na S9228, agba nke otutu extrusion na 120 Celsius C nchekwa nchekwa maka 12h nwere arụmọrụ dị mma, na nguzogide hydrolysis nke ngwaahịa ahụ n'onwe ya dịkwa mma karịa nke S9228, nke nwere ezigbo ngwa. atụmanya na mgbanwe PA.
Mgbe enwere ihe ndị dị elu maka agba mbụ, a na-atụ aro ka ịgbakwunye SARANOX PA2624, na mgbakwunye na ụdị ntụ ntụ, anyị nwekwara ike inye ndị ahịa PA antioxidant masterbatches na ihe ndị na-enweghị ihe mgbochi nke na-ebu ibu, nke dị mfe ịgbakwunye ma gbasaa, ma nyere aka. ụlọ ọrụ mmepụta ihe na-enweghị uzuzu.

PA66, otutu extrusion na 270 Celsius	0.1% 1098 + 0.2% 9228	0.1% 1098 + 0.2% 2628P5	0.3% PA2624
1 extrusion
3 extrusion
5 extrusion
Ime na 120 ° C, 12h

Ndị Sarex Chemical Laboratory kpebiri data ndị a dị n'elu