Wɔde UV absorbers ne enhindered amine light stabilizers (HALs) nyinaa di dwuma de bɔ polymers ne plastic ho ban fi ɔsɛe a hann a ɛwɔ mu no sɛe no ho. Ɛwom sɛ abien no nyinaa wɔ dwumadi ahorow a ɛte saa ara de, nanso wɔyɛ adwuma wɔ akwan horow so de ahobammɔ yi ma.
UV absorbers yɛ adwuma denam UV mframa a ɛtwetwe no so na ɛdan no ɔhyew so, na afei ɛma ɛkɔ nneɛma a atwa yɛn ho ahyia no mu. Eyi boa ma UV mframa no ntumi nkɔ polymer nhyehyɛe no mu, na enti ɛbɔ polymer no ho ban fi ɔsɛe a ɛba bere a UV mframa a ɛde ba no de ba no ho.
Nanso Hals de, ɛyɛ adwuma denam free radicals a hann a ɛda adi no ma ɛba no so, na ebetumi ama polymer nhyehyɛe no abubu. Ɛdenam saa free radicals yi a ɛma ɛyɛ nea ɛho nhia no so no, HALS boa ma polymer no ntumi nsɛe, na ɛno nti ɛtrɛw ne nkwa nna a mfaso wɔ so no mu.
Sɛ yɛbɛbɔ no mua a, bere a UV absorbers bɔ polymers ho ban fi UV mframa ho titiriw no, HAL ahorow bɔ polymers ho ban fi nea ɛpaapae a free radicals de ba a hann a wɔde di dwuma no de ba no ho. UV absorbers ne HALS nyinaa yɛ nnwinnade a ɛho hia wɔ ɔko a wɔko tia plastic ne polymers a ɛsɛe no mu, na ɛsɛ sɛ wɔde di dwuma bom ma ahobammɔ a eye sen biara ma saa nneɛma yi.
