甘油含量对热塑性淀粉结构及性能的影响  

Influences of the Glycerol Content on the Structure and Properties of Thermoplastic Starch

作　　者：石锐[1] 丁涛[1] 刘全勇[1] 张立群[1] 陈大福[2] 田伟[3] 

机构地区：[1]北京化工大学北京市新型高分子材料制备与成型加工重点实验室,北京100029 [2]北京市创伤骨科研究所,北京100035 [3]北京积水潭医院,北京100035

出　　处：《塑料》2006年第1期44-49,共6页Plastics

摘　　要：通过熔融共混的方法制得甘油含量不同的TPS样品,研究了甘油含量对材料的结构与性能产生的影响。对保存在人体正常体温(37℃)及人体感觉较舒适的湿度(50RH%)下的样品老化过程中的各项性能进行测试,为今后TPS在生物材料领域的应用提供依据。XRD测试表明:高甘油含量阻碍导致老化的β-型晶体的生成但利于ν-型晶体的形成,DMTA及力学性能测试结果表明:甘油含量的增加有利于抑制停放过程中Tg的上升,以及由重结晶所导致的相关力学性能的变化。FTIR谱图从分子短程相互作用的角度反映出甘油含量高不利于有序结构的生成,但增加了材料对水的敏感性。各测试结果均表明甘油含量的增加有延缓TPS老化的作用。The TPS materials with different glycerol contents were produced by melt blending method. The influences of the glycerol contents on the structure and properties were studied. The sampies used in various tests were stored under normal human body temperature（37℃） and a comfortable relative humidity for human being（50RH% ） in order to supply valuable information for the application of TPS as biomaterial. Results of XRD suggested that high glycerol content was helpful to the formation of single helix structure but it limited that of the double helix structure of B-type. Results of DMTA and mechanical tests demonstrated that high glycerol content was effective to restrain the increment of Tg as well as the changes of the mechanical properties resulting from the recrystallization. FT-IR was used for investigating changes in structure on a short-range molecular level,which suggested that the TPS with high glycerol content limited the formation of ordered structure hut would he more sensitive to water. All results gave information that high glycerol content was effective to restrain ageing.

关 键 词：淀粉 甘油 XRD DMTA FTIR 

分 类 号：TQ322.42[化学工程—合成树脂塑料工业]