Mechanical and thermal properties of poly(3-hydroxybutyrate) blends with starch and starch derivatives

被引:52
作者
Innocentini-Mei, LH [1 ]
Bartoli, JR [1 ]
Ballieri, RC [1 ]
机构
[1] Univ Estadual Campinas, UNICAMP, Fac Engn Quim, Dept Tecnol Polimeros, BR-13083970 Campinas, SP, Brazil
关键词
biopolymers; mechanical properties;
D O I
10.1002/masy.200350708
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(3-hydroxybutyrate) (PHB) is a highly crystalline, biodegradable and biocompatible thermoplastic. However, its limited utilization as a commodity plastic is associated to both high cost and very poor mechanical properties. Blending PHB with a natural polymer, such as starch, is one way to improve its properties and to get low price raw materials, though they are not miscible since there are no strong interactions between the hydrophilic starch and the hydrophobic PHB. In this study binary blends of PHB were prepared with natural starch, starch-adipate and grafted starch-urethane derivatives. The PHB blends were characterized in terms of their mechanical and thermal properties. For all blends a decrease of the Young modulus was observed as compared to the pure PHB. However, blends containing natural starches and starch adipate resulted in brittle materials. A significant decrease of both glass transition temperature (Tg) and melting point (Tm) was observed for all formulations. The best results, lower modulus and Tg were obtained with grafted starch-urethane blends using poly(propylene glycol).
引用
收藏
页码:77 / 87
页数:11
相关论文
共 15 条
[1]  
ALMEIDA GSG, 2001, THESIS STATE U CAMPI
[2]  
Byrom D, 1994, PLASTICS MICROBES MI, P5
[3]  
de Graaf RA, 1998, STARCH-STARKE, V50, P198, DOI 10.1002/(SICI)1521-379X(199805)50:5<198::AID-STAR198>3.0.CO
[4]  
2-O
[5]  
Doi Y., 1990, MICROBIAL POLYESTERS
[6]   Aliphatic polyester-grafted starch-like polysaccharides by ring-opening polymerization [J].
Dubois, P ;
Krishnan, M ;
Narayan, R .
POLYMER, 1999, 40 (11) :3091-3100
[7]   Crystallization behavior and environmental biodegradability of the blend films of poly(3-hydroxybutyric acid) with chitin and chitosan [J].
Ikejima, T ;
Inoue, Y .
CARBOHYDRATE POLYMERS, 2000, 41 (04) :351-356
[8]   BIODEGRADATION OF DEGRADABLE PLASTIC POLYETHYLENE BY PHANEROCHAETE AND STREPTOMYCES SPECIES [J].
LEE, BT ;
POMETTO, AL ;
FRATZKE, A ;
BAILEY, TB .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1991, 57 (03) :678-685
[9]   Properties of injection mouldet starch synthetic polymer blends - III. Effect of amylopectin to amylose ratio in starch [J].
Mani, R ;
Bhattacharya, M .
EUROPEAN POLYMER JOURNAL, 1998, 34 (10) :1467-1475
[10]   Properties of injection moulded starch synthetic polymer blends - IV. Thermal and morphological properties [J].
Mani, R ;
Bhattacharya, M .
EUROPEAN POLYMER JOURNAL, 1998, 34 (10) :1477-1487