Kedu ihe kpatara edo edo nke plastik PVC?

Kedu ihe kpatara edo edo nke plastik PVC?

Ịcha odo odo nke plastik na-ezo aka na mmeghachi omume yinye nke yinye-dị ka ụdọ molekụla polymer na-agbaji n'okpuru oke okpomọkụ, gburugburu oxidizing, ma ọ bụ n'okpuru mmetụta nke ultraviolet, infrared, na microorganisms, nke na-ebute nkwụsịtụ n'efu.

Acha edo edo nke plastik na-agụnyekarị ihe ndị a:

1. Ultraviolet radieshon

Ìhè nke anyanwụ na-amụba na oyi akwa dị n'èzí bụ ụdịdị dị iche iche na-aga n'ihu nke nwere ogologo 0.7-3000nm, nke 300-400nm ultraviolet radieshon bụ isi ihe kpatara mmebi polymer. Na ike nke photons na ultraviolet nso nke 290-400nm bụ 300-419kJ / E, nke dị elu karịa ike nkekọ nke ụfọdụ ahụkarị chemical agbụ na polymers.

2. Mmetụta nke okpomọkụ stabilizer

Ndị na-ekpo ọkụ ọkụ dị iche iche nwere mmetụta dị iche iche na nkwụsi ike ọkụ nke PVC.

Ba / Cd na organotin carboxylate ogige (dị ka maleic anhydride ester organotin stabilizers) nwere ike inye ụfọdụ nkwụsi ike UV na profaịlụ PVC eji n'èzí, ebe sọlfọ nwere organotin ogige (dị ka sọlfọ Alcohol organic tin stabilizers) na-enye obere nkwụsi ike. Nkwụsi ike ọkụ nke di-salt led stabilizer dị elu karịa nke ihe nkwụnye nnu nnu atọ.

3. Mmetụta nke usoro antioxidant

Ka ọ dị ugbu a, ihe ndị na-emezi ihe nke ndị na-emepụta profaịlụ PVC na-eji bụ ihe ndị mejupụtara stabilizers. Na mgbakwunye na isi ihe na-eme ka mmebi nke PVC kwụsie ike, ha na-agụnye usoro mmanye mmanụ, usoro antioxidant na usoro ndị ọzọ na-eme ka ahụ sie ike.

Usoro antioxidant nwere ike ịgụnye phenolic stabilizers na phosphite co-stabilizers. Ogige ndị a nwere ike ịnwe adịghị ọcha na-acha ọcha, na mgbakwunye, ha nwere ike nweta mmeghachi omume ngbanwe n'okpuru ọrụ nke ìhè, oxygen, na mmiri.