Investigation on Structure and Thermomechanical Processing of Biobased Polymer Blends

被引：12

作者：

Cicala, Gianluca ^{[1
,2
]}

Latteri, Alberta ^{[1
]}

Saccullo, Giuseppe ^{[1
]}

Recca, Giuseppe ^{[2
]}

Sciortino, Luca ^{[2
]}

Lebioda, Sascha ^{[3
]}

Saake, Bodo ^{[4
]}

机构：

[1] Univ Catania, Dept Civil Engn & Architecture, Viale Andrea Doria 6, I-95125 Catania, Italy

[2] UOS Catania, IPCB, CNR, Via Gaifami 18, I-95126 Catania, Italy

[3] Thuenen Inst Wood Res, Leuschnerstr 91b, D-21031 Hamburg, Germany

[4] Univ Hamburg, Chem Wood Technol, Leuschnerstr 91b, D-21031 Hamburg, Germany

来源：

JOURNAL OF POLYMERS AND THE ENVIRONMENT | 2017年 / 25卷 / 03期

关键词：

Lignin; Degradation; Mechanical properties; Polylactide; POLY(LACTIC ACID); PHYSICOCHEMICAL PROPERTIES; THERMAL-PROPERTIES; FIBER LENGTH; LIGNIN; COMPOSITES; INJECTION; CHEMISTRY; PLA; DEGRADATION;

D O I：

10.1007/s10924-016-0857-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The structure and composition of a biobased polymer blend with wood like appearance was studied. The effects of processing time for mixing at 190 A degrees C was investigated. The structure of the blend was unveiled combining fractionation techniques with size exclusion chromatography and nuclear magnetic resonance analysis. The material was found to be a blend of polylactide (PLA) polymer with 15.4 wt% ground softwood and 5 wt% soda lignin. The findings about composition supported the explanation of the thermal behavior and the processing stability analysis. The blend showed tensile properties degradation after mixing at 190 A degrees C for 25 min. The ultimate tensile strength dropped from 29.75 to 4.85 MPa while the tensile modulus dropped from 5.3 to 4.2 GPa. The degradation behavior was explained in terms of the PLA degradation enhanced by the presence of the natural constituents in the blend.

引用

页码：750 / 758

页数：9

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