树脂
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(树(shù )脂(zhī ),树(shù )脂(zhī ))
高(gāo )分(fèn )子(zǐ )有(yǒu )机(jī )化(huà )合(hé )物(wù ),分(fèn )天(tiān )然(rán )树(shù )脂(zhī )和(hé )合(hé )成(chéng )树(shù )脂(zhī )两(liǎng )大(dà )类(lèi )。松(sōng )香(xiāng )、安(ān )息(xī )香(xiāng )等(děng )是(shì )天(tiān )然(rán )树(shù )脂(zhī )。人(rén )工(gōng )合(hé )成(chéng )的(de )树(shù )脂(zhī )种(zhǒng )类(lèi )很(hěn )多(duō ),如(rú )酚(fēn )醛(quán )树(shù )脂(zhī )、聚(jù )氯(lǜ )乙(yǐ )烯(xī )树(shù )脂(zhī )。树(shù )脂(zhī )是(shì )製(zhì )造(zào )塑(sù )料(liào )的(de )重(zhòng )要(yào )原(yuán )料(liào )。
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