Grafting of Glycidyl Methacrylate onto Poly(lactide) and Properties of PLA/Starch Blends Compatibilized by the Grafted Copolymer

被引:75
作者
Liu, Junshao [1 ,2 ]
Jiang, Huihua [1 ]
Chen, Liangbi [1 ]
机构
[1] Wuyi Univ, Dept Environm & Architectural Engn, Wuyishan 354300, Peoples R China
[2] Key Lab Green Chem Ind & Technol Fujian Prov, Wuyishan 354300, Peoples R China
关键词
Starch; PLA-g-GMA; Compatibilizer; Grafting polymerization; BIODEGRADABLE BLENDS; RENEWABLE RESOURCES; STARCH; POLYCAPROLACTONE; COMPOSITES; ACID); ANHYDRIDE; EXTRUSION;
D O I
10.1007/s10924-012-0438-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Poly(lactide)-graft-glycidyl methacrylate (PLA-g-GMA) copolymer was prepared by grafting GMA onto PLA in a batch mixer using benzoyl peroxide as an initiator. The graft content was determined with the H-1-NMR spectroscopy by calculating the relative area of the characteristic peaks of PLA and GMA. The result shows that the graft content increases from 1.8 to 11.0 wt% as the GMA concentration in the feed varies from 5 to 20 wt%. The PLA/starch blends were prepared by the PLA-g-GMA copolymer as a compatibilizer, and the structure and properties of PLA/starch blends with or without the PLA-g-GMA copolymer were characterized by SEM, DSC, tensile test and medium resistance test. The result shows that the PLA/starch blends without the PLA-g-GMA copolymer show a poor interfacial adhesion and the starch granules are clearly observed, nevertheless the starch granules are better dispersed and covered by PLA when the PLA-g-GMA copolymer as a compatibilizer. The mechanical properties of the PLA/starch blends with the PLA-g-GMA copolymer are obviously improved, such as tensile strength at break increasing from 18.6 +/- A 3.8 MPa to 29.3 +/- A 5.8 MPa, tensile modulus from 510 +/- A 62 MPa to 901 +/- A 62 MPa and elongation at break from 1.8 +/- A 0.4 % to 3.4 +/- A 0.6 %, respectively, for without the PLA-g-GMA copolymer. In addition, the medium resistance of PLA/starch blends with the PLA-g-GMA copolymer was much better than PLA/starch blends.
引用
收藏
页码:810 / 816
页数:7
相关论文
共 23 条
[1]   The starch grafted poly(L-lactide) and the physical properties of its blending composites [J].
Chen, L ;
Qiu, XY ;
Deng, MX ;
Hong, ZK ;
Luo, R ;
Chen, XS ;
Jing, XB .
POLYMER, 2005, 46 (15) :5723-5729
[2]   Poly(L-lactide)/starch blends compatibilized with poly(L-lactide)-g-starch copolymer [J].
Chen, Li ;
Qiu, Xueyu ;
Xie, Zhigang ;
Hong, Zhongkui ;
Sun, Jingru ;
Chen, Xuesi ;
Jing, Xiabin .
CARBOHYDRATE POLYMERS, 2006, 65 (01) :75-80
[3]   Mechanical and thermal properties of starch-filled poly(D,L-lactic acid)/poly(hydroxy ester ether) biodegradable blends [J].
Garlotta, D ;
Doane, W ;
Shogren, R ;
Lawton, J ;
Willett, JL .
JOURNAL OF APPLIED POLYMER SCIENCE, 2003, 88 (07) :1775-1786
[4]   A literature review of poly(lactic acid) [J].
Garlotta, D .
JOURNAL OF POLYMERS AND THE ENVIRONMENT, 2001, 9 (02) :63-84
[5]   Crystallization and microstructure of poly(L-lactide-co-meso-lactide) copolymers [J].
Huang, J ;
Lisowski, MS ;
Runt, J ;
Hall, ES ;
Kean, RT ;
Buehler, N ;
Lin, JS .
MACROMOLECULES, 1998, 31 (08) :2593-2599
[6]   Reactive modification of Pbt with applications in low density extrusion foaming [J].
Jeong, Byeong Joon ;
Xanthos, Marino .
POLYMER ENGINEERING AND SCIENCE, 2007, 47 (03) :244-253
[7]  
John J, 1997, J POLYM SCI POL CHEM, V35, P1139, DOI 10.1002/(SICI)1099-0518(19970430)35:6<1139::AID-POLA17>3.0.CO
[8]  
2-7
[9]   Processing of biodegradable blends of wheat gluten and modified polycaprolactone [J].
John, J ;
Tang, JA ;
Bhattacharya, M .
POLYMER, 1998, 39 (13) :2883-2895
[10]   Reactive blending of biodegradable polymers: PLA and starch [J].
Jun, CL .
JOURNAL OF POLYMERS AND THE ENVIRONMENT, 2000, 8 (01) :33-37