聚乙烯基水性协同剂:聚合物拓对颜料分散的影响
Hansol Kang1,2, Si Eun Kim1, Young Il Park1
1Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea slee@krict.re.kr.
RSC advances
|October 26, 2023
概括
这项研究引入了多聚糖醇协同剂 (PGS),具有多种聚合物拓,以增强颜料在水中的分散. 超分支的PGS显示了红色170色素颗粒的优越存储稳定性.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
背景情况:
- 聚合物拓学显著影响材料特性和应用.
- 在水系统中有效的颜料分散是至关重要的,但具有挑战性.
- 有限的研究存在于聚合物拓对颜料在水中的分散的影响.
研究的目的:
- 调查不同聚合物拓的聚乙烯基水性协同剂对色素分散的影响.
- 合成和表征拓控制的多糖醇协同剂 (PGS).
- 为了评估红色170色素的分散性和稳定性,使用各种PGS拓.
主要方法:
- 制备线性,超分支和分支的循环多糖醇 (PGs).
- 聚合后修改PGs与phthalimide和benzoyl组,以创建PGSs.
- 使用PGS通过吸附和硬质阻碍对红色170色素颗粒的表面修饰.
- 颜料在水系统中的分散性和储存稳定性的评估,包括与商业分散剂的相互作用 (BYK 190).
主要成果:
- 拓控制的PGS成功合成.
- 分支PGS类型,特别是分支循环PGS (bc-PGS) 和超分支PGS (hb-PGS),改善了色素分散性.
- 改善的分散性归因于颜料表面吸附,与BYK 190分散剂的相互作用和固体效应.
- 超分支PGS (hb-PGS) 与分支循环PGS (bc-PGS) 相比,为红色170色素提供了更好的存储稳定性.
结论:
- 具有受控拓的多糖醇协同剂 (PGS) 有效地增强水性介质中的色素分散.
- 超分支PGS表现出作为一种水性协同剂的优秀潜力,用于颜色稳定.
- 这项研究强调了PGS在各种分散应用中的广泛适用性.
相关概念视频
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
314
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
314
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
Polymers: Molecular Weight Distribution
3.4K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
3.4K
Cationic Chain-Growth Polymerization: Mechanism
2.3K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.3K
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
Polymer Classification: Stereospecificity
2.4K
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...
2.4K


