1、Effects of curing temperature on the structure and properties of epoxy

When the curing temperature was high, the PCL was able to dissolve completely in the resin before crosslinking began, so that semi-interpenetrating networks were formed; and that when the curing temperature was low, the PCL was unable to dissolve, and therefore formed separate particles.

2、Curing agents for epoxy resins

Q-RIT curing agents are hardeners for epoxy resins. These are modified amines, cycloaliphatic amines, polyamides, waterborne hardeners or specialties.

3、环氧树脂固化剂的常见类型及其固化机理

环氧树脂固化剂的常见类型及其固化机理 本文简要概述了环氧树脂固化剂的常见类型及其固化机理。 包括脂肪族二胺和多胺、芳香族多胺、其他含氮化合物和改性脂肪族胺。伯胺和仲胺对环氧树脂的固化作用是通过氮原子上的活性氢打开环氧基团，使其交联固化。脂肪族多胺如乙二胺、己二胺、二 ...

4、Curing Agents for Epoxy Resin (固化剂)

The epoxy resin compositions of Three Bond currently on the market are the Three Bond 2000 Series (base agent for epoxy resin), the Three Bond 2100 Series (curing agent for epoxy resin), and the Three Bond 2200 Series (one-part thermal cure epoxy compound resins).

Epoxy Curing Agents – Latent Curing Agents for One Component Systems

In the next blog post, we’ll take a look at biobased curing agents for epoxy resin, which is becoming an ever-increasing need for formulators to achieve sustainability of their products.

Curing agents for epoxy resins

Curing can occur by either homopolymerisation initiated by a catalytic curing agent or a polyaddition/copolymerisation reaction with a multifunctional curing agent.

Current situation and development trend of reactive epoxy resin curing

The common curing agents of epoxy resin are visible curing agent and latent curing agent. Among them, the explicit curing agent belongs to the conventional curing agent, and the explicit curing agent can be divided into two types: additive polymerization curing agent and catalytic curing agent.

The epoxy resin system: function and role of curing agents

In the presence of curing agents, epoxy resins become rigid and infusible. Eco-friendliness and mechanical functionality have emerged as vulcanization properties.

Modified Poly (Lactic Acid) Epoxy Resin Using Chitosan for Reactive

Poly (lactic acid) was melt-blended with epoxy resin without hardener and chitosan (CTS) to prepare modified PLA (PLAEC). Epoxy resin 5% and CTS 1-20% (wt/wt) were incorporated into PLA during melt mixing.

Mechanism and Applications of Epoxy Curing Agents

Epoxy resin is a widely used polymer material with extensive applications in construction, aerospace, automotive, and other industries. Epoxy curing agents are specialized chemicals that facilitate the curing reaction of epoxy resins, enhancing their mechanical properties and chemical stability.

Research Progress on Poly(Lactic Acid)-Based Epoxy Resin Curing Agents

Abstract: Poly(lactic acid) (PLA) is a biodegradable polymer with excellent mechanical properties and biocompatibility. In recent years, with advancements in materials science, PLA-based epoxy resin (PLA-Epoxy) composites have gained significant attention due to their unique properties. This paper reviews the research progress on PLA-Epoxy curing agents, including synthesis methods, curing mechanisms, and the selection and application of curing agents.

Keywords: Poly(lactic acid); Epoxy resin; Curing agent; Research progress

1. Introduction

Poly(lactic acid) (PLA), a biodegradable polyester synthesized from lactic acid monomers, is widely used in biomedical, packaging, and textile fields due to its excellent mechanical properties, biocompatibility, and environmental friendliness. its low mechanical strength limits applications in high-performance domains. To address this, researchers have proposed combining PLA with epoxy resin to develop PLA-Epoxy composites. These composites exhibit enhanced mechanical strength, thermal stability, and chemical resistance, offering new possibilities for PLA-based materials.

2. Synthesis Methods of PLA-Epoxy Resins

Synthesis methods for PLA-Epoxy resins primarily include copolymerization and grafting.

• Copolymerization: PLA and epoxy monomers are polymerized via free radical or ring-opening polymerization to form copolymers, followed by post-treatment to obtain PLA-Epoxy composites.
• Grafting: Epoxy monomers are introduced onto PLA chains to create block copolymers, which are then processed into composites.

Copolymerization is the most common method due to its simplicity and cost-effectiveness, though it results in lower mechanical performance. Grafting, while more complex and costly, produces composites with superior mechanical properties.

3. Curing Mechanisms of PLA-Epoxy Resins

The curing process of PLA-Epoxy resins involves two stages: crosslinking reactions and moisture removal.

• During crosslinking, epoxy groups react with hydroxyl groups on PLA chains, forming chemical bonds that enhance strength and hardness.
• Moisture removal eliminates excess water, stabilizing the resin. Thermal effects during curing also significantly influence the process.

4. Selection and Application of PLA-Epoxy Curing Agents

Choosing appropriate curing agents is critical to improving mechanical properties. Common curing agents include:

• Amine-based agents: Offer high crosslinking density and low viscosity but may produce irritating odors.
• Anhydride-based agents: Provide good thermal resistance and crosslinking density but require catalysts to reduce viscosity.
• Imidazole-based agents: Exhibit high crosslinking density, low viscosity, and no irritating odors, making them a popular choice.

PLA-Epoxy resins, as novel high-performance materials, hold broad application potential. By selecting optimal curing agents, composites with excellent mechanical and thermal properties can be developed. While progress has been made, further research is needed to refine synthesis methods and curing processes. In the future, PLA-Epoxy resins are expected to play a larger role in aerospace, automotive, and medical device industries.