中国科技论文在线

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2006年10月31日

【期刊论文】Thermal and hydrolytic degradation behaviour of degradable poly(etheresteramide) copolymers based on E-caprolactone, 11-aminoundecanoic acid, and poly(ethylene glycol)

钱志勇， ZhiYong Qian a， *， Sai Li b， Yi He b， Xiao Bo Liu b

Polymer Degradation and Stability 84 (2004) 41-47，-0001，（）：

-1年11月30日

摘要

A new kind of aliphatic polyetheresteramide copolymers (PEEAs) based on E-caprolactone, 11-aminoundecanoic acid, and poly(ethylene glycol) (PEG) were synthesized by melt polycondensation. The thermal and hydrolytic egradation behaviour of these copolymers was studied using FTIR, 1H-NMR, and TGA. PEG content, thickness of the test sample, and pH of degradation medium have great effect on degradation rate. The degradation rate increased with PEG content and pH, but decreased with thickness of the test sample.

Polyetheresteramide， Degradable polymer， Thermal degradation， Hydrolytic degradation， TG

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2006年10月31日

【期刊论文】Synthesis, characterization, and thermal properties of biodegradable aliphatic copolyester based on q-caprolactone, adipic acid, and 1,6-hexanediol

钱志勇， CaiBing Liu a， ZhiYong Qian a， *， YingChun Gu b， LinYu Fan c， Jun Li d， GuoTao Chao a， WenJuan Jia a， MingJing Tu a

Materials Letters 60 (2006) 31-38，-0001，（）：

-1年11月30日

摘要

In this paper, biodegradable aliphatic copolyesters were synthesized from q-caprolactone, adipic acid, and 1,6-hexanediol by meltpolycondensation method. The chemical structure, and thermal properties of these copolymers were studied in detail. The water absorption behavior and hydrolytic degradation behavior of this copolyester were also studied. This aliphatic copolyester prepolymer would be used to prepare the biodegradable poly(ester urethane), which might have potential application in biomedical field.

Biodegradable copolymer， Poly(， ester urethane)，， Aliphatic polyester， Thermal property， In vitro degradation

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2006年10月31日

【期刊论文】Synthesis, characterization and in vitro degradation of biodegradable polyesteramide based on lactic acid

钱志勇， Qian Zhiyong， Li Sai， Zhang Hailian， Liu Xiaobo

Colloid Polym Sci (2003) 281: 869-875，-0001，（）：

-1年11月30日

摘要

A new type of biodegrad-able polyesteramide P(LA/AU) based on lactic acid and aminoun-decanoic acid was synthesized by the meh polycondensation method. The copolymers obtained were charac-terized by FTIR. 1H-NMR, DSC, and XRD. The in vitro degradation behavior of the copolymers was studied using weighing. 1H-NMR. FT1R, DSC. and SEM. With the increase in aminonndecanoic acid units, the mehing temperature and crystallinity increased, but the water absorption and degradation rate decreased accordingly. During degradation in vitro, the ester moiety decreased due to ester cleav-age along the macromolecular main chain. As degradation proceeded. the mehing temperature and crystallinity increased at first, then started to decrease because the crystalline phase was destroyed.

Polyesteramide， Biodegradable polymer， Hydrolytic degradation， Aminoundecanoic acid， Surface morphology

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2006年10月31日

【期刊论文】Synthesis of Biodegradable Poly(butylene terephthalate)/poly(ethylene glycol) (PBT/PEG) Multiblock Copolymers and Preparation of Indirubin Loaded Microspheres†

钱志勇， Yan Wang， CaiBing Liu， LinYu Fan， Yong Sheng， Jian Mao， GuoTao Chao， Jun Li， MingJing Tu， ZhiYong Qian， *

Polymer Bulletin 53, 147-154 (2005)，-0001，（）：

-1年11月30日

摘要

Biodegradable PBT/PEG copolymers were synthesized by macromolecular transesterification method, and were characterized by 1H-NMR and DSC. Alkaline degradation behavior was studied too. Indirubin loaded microspheres were prepared by O/W solvent evaporation method.

multiblock copolymer， PBT/， PEG， poly(， ether ester)， s， microspheres

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2006年10月31日

【期刊论文】Synthesis and thermal degradation of biodegradable polyesteramide based on e-caprolactone and 11-aminoundecanoic acid

钱志勇， Zhiyong Qian， Sai Li， Yi He， Cao Li， Xiaobo Liu*

Polymer Degradation and Stability 81 (2003) 279-286，-0001，（）：

-1年11月30日

摘要

A new kind of polyesteramide copolymer based on e-caprolactone and 11-aminoundecanoic acid has been synthesized by melt polycondensation. The copolymers were characterized by FTIR, 1H-NMR, DSC, and WAXD. With the increase in aminoundecanoic acid content, the melting temperature, heat of fusion, and Td,50% increased accordingly. The thermal degradation of the P(CL/AU)x/y copolymers was studied using FTIR, and TG During thermal degradation, the ester bond decomposes at lower temperature, then the amide bond decomposes at higher temperature.

Polyesteramide， Biodegradable polymer， Crystallinity， Thermal degradation， Nylon 11

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