💡 In This Article What tougheners actually do in epoxy adhesives The trade-off between interfacial stress relaxation and epoxy network formation How excessive toughener loading can affect crosslink density, Tg, and cohesive strength Epoxy adhesives are known for high strength and excellent adhesion, but they can also be relatively brittle, particularly under impact or other … Continue reading [Modifier] Does More Toughener Always Mean Better Adhesion?
Author: Epoxy Formulation Researcher
What Makes a High-Thermal-Conductivity Filler Different? — How a Formulation Developer Compares Alumina, BN, and AlN
💡 In This Article Comparing the characteristics of three major thermal conductive fillers: Alumina, BN, and AlN Key factors in filler selection: cost, material properties, and equipment compatibility Practical guidelines for evaluating fillers and designing formulations before starting actual testing In the previous article (High Thermal Conductivity Adhesives: Why Are They So Difficult to Formulate?), … Continue reading What Makes a High-Thermal-Conductivity Filler Different? — How a Formulation Developer Compares Alumina, BN, and AlN
High Thermal Conductivity Adhesives — Why Are They So Difficult to Formulate?
💡 In This Article The trade-offs that arise as thermal conductive filler loading increases Why understanding phonon scattering and interfacial thermal resistance matters in epoxy formulation How particle size distribution and interfacial properties can be optimized to improve thermal conductivity without sacrificing processability One request comes up from customers surprisingly often when developing an adhesive: … Continue reading High Thermal Conductivity Adhesives — Why Are They So Difficult to Formulate?
[Filler] Spherical vs. Angular Fillers — Why Does Viscosity Change Even with the Same Material?
💡 In This Article How particle shape affects viscosity and flow behavior at the same filler loading How particle–particle friction and mechanical interlocking affect the rheology and dispensing behavior of epoxy adhesives How shear rate influences shear-thinning behavior How to select the right filler shape to achieve both high loading and the required material properties … Continue reading [Filler] Spherical vs. Angular Fillers — Why Does Viscosity Change Even with the Same Material?
[Filler] Why Does Particle Size Distribution (PSD) Matter? — Why Fillers with the Same D50 Can Behave Differently
💡 In This Article - Why D50 alone does not tell the whole story - How particle packing and bimodal particle systems affect viscosity and maximum filler loading - How PSD optimization can improve thermal conductivity while helping control CTE and cure shrinkage In the previous article (Why Does Filler Particle Size Matter? — The … Continue reading [Filler] Why Does Particle Size Distribution (PSD) Matter? — Why Fillers with the Same D50 Can Behave Differently
[Filler] Why Does Filler Particle Size Matter? — The Roles of Fine and Coarse Particles
💡 In This Article How particle size affects flow behavior at the same filler loading Why fine particles increase the effective resin demand and intensify shear-thinning behavior Why coarser fillers can offer rheological advantages in highly filled formulations How particle size selection affects dispensing and overall processability In the previous article (Why Does Adding More … Continue reading [Filler] Why Does Filler Particle Size Matter? — The Roles of Fine and Coarse Particles
[Filler] Why Does Adding More Filler Increase Viscosity So Dramatically?
💡 In This Article Why viscosity rises nonlinearly as filler loading increases How particle-size distribution can reduce viscosity even at higher loading How particle shape, surface chemistry, and dispersion affect flow Why shear thinning can determine whether a highly filled epoxy can actually be dispensed In the previous article (Filler Selection in Epoxy Adhesives: More … Continue reading [Filler] Why Does Adding More Filler Increase Viscosity So Dramatically?
[Filler] Filler Selection in Epoxy Adhesives — More Than Just Filling Space
💡 In This Article What fillers actually do in epoxy adhesives Major filler types and their roles in electronic materials Why particle size, surface treatment, and dispersion matter The practical limits of filler loading How hybrid fillers and particle alignment can expand the design space When people picture an epoxy adhesive, they usually imagine a … Continue reading [Filler] Filler Selection in Epoxy Adhesives — More Than Just Filling Space
Adhesion Testing ③: What Can a Peel Force Curve Tell Us?
💡In This Article • The relationship between peel strength and the Peel Force Curve• Why a sawtooth-shaped force curve can indicate Stick-Slip behavior• How to obtain a more reliable representative peel-strength value In the previous article, Adhesion Testing ②: Why Do 90° and 180° Peel Tests Give Different Results?, we looked at peel-test configurations and … Continue reading Adhesion Testing ③: What Can a Peel Force Curve Tell Us?
Adhesion Testing ②: Why Do 90° and 180° Peel Tests Give Different Results?
💡 In This Article The difference between 90° and 180° peel testing Why peel-angle distortion can occur when testing flexible adherends How to interpret peel strength together with the three major failure modes How failure mode can guide formulation and surface-treatment strategies In the previous article, Adhesion Testing ①: Pull, Shear, and Peel Tests Explained, … Continue reading Adhesion Testing ②: Why Do 90° and 180° Peel Tests Give Different Results?