核/壳结构硅橡胶粒子制备及其改性聚乳酸研究
关键词 核壳结构 硅橡胶粒子 聚乳酸 结晶 阻燃
毕业论文设计说明书(论文)外文摘要
Title Study and preparation of PLA modified by NSRP
Abstract
Nano silicon rubber particles (NSRP) were prepared by seed emulsion polymerization. A series of test of the particles were carried out. PLA was respectively modified by NSRP alone and by the blends of core/shell NSRP and phosphorus flame retardant (PX-220). The results show that when core/shell NSRP were used alone, the modified PLA shows no significantly improved flammability or thermal stability in all formulas but remarkable increased toughness and crystallinity and little loss of tensile strength when particle proportion is between 3% and 6%. When NSRP were used together with PX-220, a little addition of NSRP improves the phenomenon of droplet while high content of NSRP makes the flammability of the modified PLA bad. In all tested formulas, proportion 75/22/3(PLA/PX-220/NSRP) gives the best comprehensive effect.
(空2行)
Keywords core/shell silicon rubber particle PLA crystallinity
flammability
目 录
1 绪论 1
1.1 研究背景 1
1.1.1 PLA材料的发展历程 1
1.1.2 PLA材料的性质及应用 1
1.1.3 PLA的主要改性方法 2
1.2 研究现状 2
1.2.1 PLA纳米复合材料的研究现状 2
1.2.2 核壳结构NSRP的特点 2
1.3 研究意义及内容 2
2 核壳结构硅橡胶粒子的制备、结构表征及热性能研究 4
2.1 概述 4
2.2 实验部分 4
2.2.1 实验原料与仪器 4
2.2.2 MMA的精制 5
2.2.3 核壳结构硅橡胶粒子的制备 5
2.2.4 性能测试 6
2.3 结果与讨论 7
2.3.1 核壳粒子结构的设计 7
2.3.2 核壳粒子的表征和结构分析 7
2.3.3 核壳结构硅橡胶粒子的热稳定性能分析 10
2.4 本章小结 10
3 核壳粒子改性PLA的制备、力学性能、结晶性能及热性能研究 12
3.1 概述 12
3.2 实验部分 12
3.2.1 实验原料与仪器 12
3.2.2 核壳结构硅橡胶粒子改性PLA的制备 13
3.2.3 性能测试 13
3.3 结果与讨论 14
3.3.1 核壳粒子改性PLA的力学性能 14
3.3.2 水的静态接触角测试 15
3.3.3 改性PLA中核壳粒子分散性观察 16