People will get old and rubber will age. After the rubber products are used for a long time, some will become soft and sticky, and some will harden and become brittle. In this case, the original elasticity and strength of the rubber are remarkably lowered, and cracking, chalking, discoloration, and mildew are also caused. Aging is the result of changes in the rubber structure under the influence of various external factors, the most common of which is the thermal Okukaddiwa kw’ebbugumu ne okisigyeni.
Oxidation y’emu ku nsonga enkulu eziviirako okukaddiwa kwa kapiira. okisigyeni ayita mu nkola ya free radical chain ne molekyu za kapiira mu kapiira, era olujegere lwa molekyu lumenyeka oba okusalasala okuyitiridde, ekivaako enkyukakyuka mu mpisa za kapiira. ozone ekola nnyo mu kemiko okusinga okisigyeni era esinga okuzikiriza omupiira.
Increasing the temperature also causes thermal cracking or thermal crosslinking of the rubber, but the basic effect of heat is activation. Increasing the rate of oxygen diffusion and activating the oxidation reaction to accelerate the oxidation reaction rate of the rubber is a ubiquitous phenomenon of thermal oxygen aging. Ultraviolet rays also have a destructive effect on rubber. In addition to directly causing the breakage and Okuyunga enjegere za molekyu za kapiira, omupiira gunywa amaanyi g’ekitangaala okukola ebirungo ebitaliimu, ebitandika n’okwanguyiza enkola y’ensengekera y’enjegere z’okwokya . Okugatta ku ekyo, okunyigirizibwa kw’ebyuma, obunnyogovu, ebyuma ebikozesebwa mu kukola eddagala, amasannyalaze g’ebyuma agakyukakyuka, emisinde egy’amaanyi amangi, amasannyalaze n’ebiramu nabyo bisobola okukaddiwa omupiira.
Newankubadde nga okukaddiwa kwa kapiira tekuyinza kwewalibwa ddala, kiyinza okulwawo. Ekipimo ekisinga okubeera ekirungi era ekikola kwe kwongerako ekirungo ekiziyiza okukaddiwa. ekirungo ekiziyiza okukaddiwa kisobola okukwata ebintu ebikola ebikolebwa mu kiseera ky’okukaddiwa kw’ebbugumu kwa kapiira, bwe kityo ne kikuuma omupiira.