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Chinese Journal of Materials Research  2016, Vol. 30 Issue (7): 553-560    DOI: 10.11901/1005.3093.2015.577
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Synthesis and Properties of Polyester Ureide Multiblock Copolymers Composed of Poly (butylene-succinate-uera) and Poly (adipate-succinate-uera)
DAI Hong, LIU Yuejun**(), TAN Haiying, CUI Lingna, YANG Wei
(Key Laboratory of New Materials and Technology for Packaging, HunanUniversity of Technology, Zhuzhou 412007, China)
Cite this article: 

DAI Hong, LIU Yuejun, TAN Haiying, CUI Lingna, YANG Wei. Synthesis and Properties of Polyester Ureide Multiblock Copolymers Composed of Poly (butylene-succinate-uera) and Poly (adipate-succinate-uera). Chinese Journal of Materials Research, 2016, 30(7): 553-560.

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Abstract  

A series of polyester ureidemultiblock copolymers (PBSu-co-PBAu) composed of the pre-prepared poly(butylene-succinate-urea) (PBSu) and poly(adipate-succinate-uera) (PBAu) were successfully synthesizedby melt polymerization processes with toluene-2, 4-diisocyanate(TDI) as a chain extender. Then the structure, thermal properties, mechanical properties and biodegradable properties of the copolymers were characterized by means of1H-NMR, DSC, TG, XRD, universal tensile machine and hydrolytictest respectively. The results indicated that the toughness of multiblock copolymers was enhanced by the incorporation of PBAu. The multiblock copolymers possessed excellent thermal stability and biodegradable properties, as well as tensile properties superiorto the homopolymers PBSu and PBAu, the unmodified-PBS and -PBA. Besides, the thermal properties, biodegradability and mechanical properties of the multiblock copolymers can be adjusted by varying the dose of PBSu and PBAu.

Key words:  organic polymer materials      multiblock copolymers      chain extension      biodegradability     
Received:  15 October 2015     
Fund: *Supported by National Natural Science Foundation of China No11372108, National Science Foundation of Hunan Province No14JJ5021 and the Open Fund Project Innovation Platform of University in Hunan No13K098

URL: 

https://www.cjmr.org/EN/10.11901/1005.3093.2015.577     OR     https://www.cjmr.org/EN/Y2016/V30/I7/553

Fig.1  1H-NMR spectra of PBAu/PBA (A) and PBSu/PBS (B)
Fig.2  1H-NMR spectrum of multiblock copolymers
Sample Feed composition Found composition
FPBSu FPBAu FTDI FPBSu FPBAu FTDI
PBSu-PBAu100-0 93.98 - 6.02 93.83 - 6.17
PBSu-PBAu10-90 84.73 9.35 5.92 84.81 9.17 6.02
PBSu-PBAu30-70 65.96 28.21 5.83 66.07 28.14 5.79
PBSu-PBAu50-50 47.09 47.16 5.75 48.79 45.23 5.98
PBSu-PBAu30-70 28.16 65.77 6.07 30.14 63.89 5.97
PBSu-PBAu10-90 9.46 84.75 5.79 11.61 82.76 5.63
PBSu-PBAu0-100 - 94.13 5.87 94.24 - 5.76
Table 1  Composition for multiblock copolymers and homopolymer (%, mass fraction)
Fig.3  TG curves of copolymers
Sample Td/ oC T50%/oC T95%/oC
PBSu-PBAu100-0 366 404 437
PBSu-PBAu90-10 365 400 436
PBSu-PBAu70-30 361 398 431
PBSu-PBAu50-50 361 396 431
PBSu-PBAu30-70 360 396 420
PBSu-PBAu10-90 359 393 416
PBSu-PBAu0-100 355 391 412
PBS 373 409 439
PBA 368 400 417
Table 2  Data for TG analysis of copolymers
Fig.4  DSC curves of copolymers (a) the second heating scan, (b) cooling scan
Sample Tm/oC Tc/ oC △Hm/ Jg-1 △Hc/ Jg-1 Xc/ %
Tm-S Tm-A Tc-S Tc-A △Hm-S △Hm-A △Hc-S △Hc-A Xc-S Xc-A Xc-T
PBSu-PBAu100-0 113.2 - 72.8 - 61.3 - 62.4 - 55.6 - 55.6
PBSu-PBAu90-10 110.3 - 69.9 - 59.3 - 64.5 - 53.8 - 53.8
PBSu-PBAu70-30 109.8 49.8 67.6 24.7 41.7 4.9 41.7 0.8 37.8 5.4 43.2
PBSu-PBAu50-50 109.3 49.4 65.7 24.8 35.6 15.1 37.2 15.1 32.3 16.6 48.9
PBSu-PBAu30-70 108.0 51.1 61.8 25.3 23.4 29.5 34.5 29.3 21.2 32.5 53.7
PBSu-PBAu10-90 106.1 55.4 - 25.8 15.0 34.8 - 39.9 13.6 38.3 51.9
PBSu-PBAu0-100 - 56.0 - 25.9 - 36.2 - 48.6 - 39.8 39.8
PBS 111.5 - 74.9 - 65.6 - 58.6 - 58.5 - 58.5
PBA - 54.3 - 27.3 - 42.3 - 41.2 - 43.2 43.2
Table 3  Data for DSC analysis of copolymers
Fig.5  XRD curves of copolymers
Fig.6  The relevance between crystallinity and tensile strength of copolymers (Undetectable. The number in the X axis indicated the percentage composition of PBAu in polyester ureidemultiblock copolymers)
Sample Tensile strength
/ MPa
Elongation at
break / %
PBSu-PBAu100-0 41.1±3.5 12±7
PBSu-PBAu90-10 38.5±1.6 16±2
PBSu-PBAu70-30 21.0±2.8 121±12
PBSu-PBAu50-50 23.2±2.0 139±9
PBSu-PBAu30-70 24.6±1.4 142±16
PBSu-PBAu10-90 24.1±4.5 186±24
PBSu-PBAu0-100 15.3±0.7 215±21
PBS 36.4±1.8 25±14
PBA 14.4±0.6 226±6
Table 4  Tensile properties of copolymers films
Fig.7  The relevance between crystallinity and weight lost of copolymers. (Undetectable. The number in the X axis indicated the percentage composition of PBAu in polyester ureidemultiblock copolymers)
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