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polymers

??? ??. 1.1 ????????????????????20??20??,???????1839?,???Goodyear???????1855?,???Parks?????????????????1889?,???De Chardonnet(????)??????1907?,???????. ??? ??. 1920?,???Staudinger??????"???,?????????,?????????????????????????1935?,Carothes????66,1938?????30??,??????????????????,PVC(1927~1

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polymers

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