淀粉基生物可降解塑料的制备和表征.pdf

塑 料 淀粉基 物可降解塑料的制备和表征 2005 年 34 卷 第3 期 改性与合金 * , (, 100084) :, , ; , , , 、、X2 , 、、。, 20MPa , 100%, , B2, 。, , , 。 :; ; ; B2 :T Q327. 8 :A : 1001- 9456( 2005)03- 0051- 05 Pr epar ation and Character izat ion of Starch Based Biodegradable P last ics YANG Do g2zhi, HU Pi g ( I stitute of Polymer Mat erials a d E gi eeri g, Departme t of Chemical E gi eeri g, Tsi ghua U iversity, Beiji g 100084, Chi a) Abstr act : The thermoplastic starch was obtai ed by the mixi g of starch ( St ) powder a d glycerol, a d the processi g tech ique was discussed. The ble ds of starch with polyvi yl alcohol (PVA) wer e prepared for improvi g the properties. The mecha ical properties, thermal stability, morphology a d crystallizatio of the ble ds were studied by mea s of mecha ical performa ce testi g i strume ts, thermogr avimetry, sca i g electro micrograph a d wide a gle X2ray diffr actio . The results revealed that the te sile stre gth of the PVA2St ble ds with some ratio of PVA a d St reached to 20MPa, a d its elo gatio at break r eached to 100%. Moreover, the hydr ophilic property of SP system was depressed by addi g poly2B2hydroxybutyrate( PHB) . The SP ble ds have the merit of simple processi g tech ique, a d are easy to i dustrialize a d biodegr adable e tir ely. They will fi d wide applicatio s. Key words: starch;thermoplastic star ch;polyvi yl alcohol; poly2B2hydroxybutyrate 1 年产量约