生物降解的多基酸与不同的酸单体:化学结构和物理化学特性
Tatiana G Volova1,2, Natalia O Zhila1,2, Evgeniy G Kiselev1,2
1Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia.
International journal of molecular sciences
|September 28, 2023
概括
与传统的共聚物相比,含有基酸单体的新型高聚合物表现出增强的热稳定性和更快的结晶率. 这些先进的材料对高质量的化加工产品有很大的前景.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 3-基酸盐 (3HB) 和3-基酸盐 (3HV) 的共聚合物是具有可调节性质的可生物降解聚合物.
- 结合新型单体可以进一步修改热和结晶行为.
- 了解结构属性关系是开发先进聚合物应用的关键.
研究的目的:
- 合成和表征新型聚合物,其中包括4-基瓦莱酸 (4HV) 和3-基-4-甲基瓦莱酸 (3H4MV) 单体.
- 调查单体组成和比例对热性质和结晶动力学的影响.
- 评估这些聚合物在炼加工中的潜力.
主要方法:
- 合成P(3HB-co-3HV-co-4HV) 和P(3HB-co-3HV-co-3H4MV) 的聚合物.
- 差分扫描热量计 (DSC) 用于热分析 (Tmelt,Tg).
- 热重力测量分析 (TGA) 用于热降解温度 (Tdegr).
- 光学显微镜用于研究球状物生长速度 (Gmax).
主要成果:
- 聚合物表现出更高的热稳定性,点 (Tmelt) 和降解温度 (Tdegr) 之间的差距更大.
- 与P(3HB-co-3HV) 共聚合物相比,聚合物中的点和玻璃化过渡温度较高.
- 聚合物表现出较低的结晶度 (40-46%) 和显著更高的结晶率 (Gmax: 1.6-2.0 微米/分钟) 比P(3HB-co-3HV) (58-66%的结晶度,Gmax: 0.52 微米/分钟).
结论:
- 加入4HV和3H4MV单体增强了多基甲酸盐的热稳定性和化可加工性.
- 修改后的结晶动力学,特别是更快的球状石形成,有利于生产高质量的聚合物产品.
- 这些聚合物代表了先进材料应用的有希望的候选者,需要提高热性能和高效处理.
关键词:
P(3HB-co-3HV-co-3H4MV) 的时间为1小时.P ((3HB-co-3HV-co-4HV) 已经成为一种常见的疾病.聚合物的共聚物.同热结晶化异热结晶化形态学 形态学 形态学物理化学特性 物理化学特性球状石的形成速度是多少热行为热行为.更多相关视频
相关概念视频
Characteristics and Nomenclature of Copolymers
2.6K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.6K
Polymer Classification: Architecture
2.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.8K
Characteristics and Nomenclature of Homopolymers
3.1K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
3.1K
Polymer Classification: Stereospecificity
2.5K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.5K
Step-Growth Polymerization: Overview
3.5K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.5K
Types of Step-Growth Polymers: Polyesters
2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K


