1. vulcanization ti goma .
Ti Goodyear, maysa a nakurapay nga Amerikano nga imbentor, ket determinado a mangbalbaliw iti raw rubber iti maysa a nasayaat a material nga agpada a nababaneg ken natangken ti . isu ket naallukoy iti goma iti nasurok a 30 a tawen, ngem binusbosna kadi ti biagna iti kinapanglaw. ti estoria iti ilina a Goodyear: Kayatmo kadi ti agsapul iti Goodyear? Kitaem, adda dayta! He wore a rubber cap, a rubber lined windbreaker, a rubber vest underneath and rubber pants underneath. Rubber boots and a rubber purse-not a cent in it. Goodyear gels were mixed with magnesium oxide, boiled in lime water, boiled in nitric acid, sprinkled with sulfur on the surface of gels, dried in the sun, and so on. After all his experiments had failed, he put bits of raw glue, powdered sulfur, and turpentine into a crucible and cooked it on the stove. Accidentally, a piece of glue popped out of the cauldron and fell into the flames, burning but not sticky. Goodyear jumped for joy. The rubber, heated with sulfur, was what he had been waiting for all day.
In today's rubber factories, this is called the vulcanization process. Since then, raw rubber has been transformed into a useful material. Goodyear's vulcanization process was later figured out by chemists: sulfur atoms built "Bridges" between large molecular chains of raw rubber, as if the springs of a sofa were connected to each other with twine and wire, elastic but not loose.
2. Kasano ti panagbalbaliw ti dosis ti nangisit ken puraw ti goma?
Goma a nalaokan iti nangisit a karbon ket mabalin a natangken ken isuot a naandur. a suela, ti nangisit a kolor ti goma a goma ket gapuanan ti karbon a nangisit. a puraw a goma nga awan ti karbon a nangisit, inayon ti puraw a calcium carbonate, qin puraw a pulbos a punno. eraser pencil words ket mabalin laeng a maaramid manipud iti puraw a goma, saan a mabalin a mangburas ti balikas ti pencil ti {3} a saan a puraw ti {3} a saan a puraw ti {3} a goma a saan a puraw ti {3} a balikas a saan a puraw ken puraw ti {3} a saan a puraw ti goma a saan a nasayaat ti pannakapili ti maysa a balikas ti pencil ti maysa a balikas a saan a nasayaat ti ar-aramid ti maysa a balikas a saan a nasayaat ti ar-aramid ti maysa a balikas a saan a nasayaat ti ar-aramidna ket saan a mabura ti maysa a balikas ti penc. Ti kagimongan, itatta, ti pananginayon kadagiti filler iti goma ket mabalin a mangaramid kadagiti produkto a kasla nadumaduma a kolor, a mabalin a makatulong kadagiti personal a kasapulan dagiti moderno a tattao para kadagiti produkto ti goma{{5} .