Diblock Copolymer of Cellulose and Poly(methyl methacrylate) Induced by Mechano Chemical Polymerization and its Composite Material

微晶纤维素（MCC）在77 K真空条件下的机械断裂导致MCC的链端型自由基（MCC mechano自由基）的产生，这些自由基是由MCC的断裂引起的。- 1,4糖苷键被困在MCC固体表面。在MCC表面合成了一种新型的MCC- pmma嵌段共聚物（MCC-嵌段pmma）。制备了化学修饰的MCC纳米颗粒，表面覆盖MCC-block-PMMA链。化学改性纤维素纳米颗粒与PMMA的复合改善了其物理性能。此外，还获得了化学改性纤维素纳米颗粒的透明薄片。

The mechanical fracture of microcrystalline cellulose(MCC) in vacuum at 77 K resulted in the production of chain-end-type radicals of MCC(MCC mechano radicals), which were induced by scission of.-1, 4 glycosidic linkages and trapped on the MCC solid surface. A novel block copolymer of MCC and MMA(MCC-block-PMMA) was synthesized on the MCC surface initiated by the MCC mechano radicals. The chemically modified MCC nano particles covered with PMMA chains of MCC-block-PMMA was produced. The composite of chemically modified cellulose nano particles and PMMA improved its physical property. Furthermore, the transparent sheet of the chemically modified cellulose nano particles was obtained.