作者机构：
[肖俊华; 左迎峰; 刘文杰; 吴义强; 赵星] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[肖俊华; 左迎峰; 刘文杰; 吴义强; 赵星] 410004, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[Tan Haiyan; Zhang Yanhua; Gu Jiyou; Cao Jun; Wei Shuangying; Zuo Yingfeng] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Peoples R China.;[Zuo Yingfeng] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Zhang Yanhua] N;Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Peoples R China.
关键词：
corn starch;polylactic acid;mixing ratio;interdependence of two-phase;properties
摘要：
Starch/polylactic acid（PLA） composites were prepared by melt extrusion, with corn starch and PLA as raw materials, glycerol as the plasticizer. Effects of starch/PLA ratio on the interdependence of two-phase and other properties of the composites were studied. The combination of results of TGA with SEM indicated that the interdependence between starch and PLA was increased gradually as the starch/PLA ratio reduced. DSC results showed that the glass transition temperature（Tg）, melting temperature（Tm） and degree of crystallinity of PLA in composites were increased gradually, whereas the cold crystallization temperature（Tc） was gradually decreased as the starch/PLA ratio reduced. The rheological properties of composites were closely related with the interdependence of two-phase, with reducing starch/PLA proportion, the interdependence was increased, and then the strain for storage modulus was firstl reduced and then gradually increased. Frequency scanning showed that the storage modulus and complex viscosity were decreased with reducing starch content. As the starch/PLA ratio reduced, the matrix phase PLA was increased, so that the strength of composites was increased gradually, whereas water absorption rate was decreased gradually.
摘要：
To enhance the properties of sodium silicate wood adhesive modified by PVOH (polyvinyl alcohol), different organic additives (compound A) and inorganic fillers (compound B) were added into the system. Their effects on the thermal stability and molecular structure of the composite adhesive were investigated by scanning electron microscopy (SEM), spectroscopic analysis (FT-IR), differential scanning calorimetry (DSC), and thermo- gravimetric analysis (TGA). The results showed that when the compound A consisting of amino acid, TEOS (Tetraethyl orthosilicate), sodium dodecyl sulfate with the mass ratio of 5:3:3 and B consisting of 50% active magnesium oxide and 50% nano-silica were added into the cross-linked sodium silicate adhesive system with the ratio of 90:3, the bonding and water resistance properties were improved by 97.6% and 46.7%, or 13.7% and 36% relative to pure and cross-linked sodium silicate, respectively. The addition of organic additives and inorganic fillers had a good effect on both the bonding strength and thermal stability of sodium silicate wood adhesive modified by PVOH.
作者机构：
[吴义强; 左迎峰] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, 410004, China;[张彦华; 顾继友] Collegeof Material Science & Engineering, Northeast Forestry University, Harbin, 150040, China
通讯机构：
[Wu, Y.-Q.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
作者机构：
[吴义强; 左迎峰] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, 410004, China;[张彦华; 顾继友] College of Material Science & Engineering, Northeast Forestry University, Harbin, 150040, China
通讯机构：
[Wu, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
