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Dielectric Cure Monitoring Part Five: Choose the Optimum Frequency for Cure Monitoring

March 7, 2022 By Jeffrey Gotro 4 Comments

Guest Post by Huan Lee, Lambient Technologies The dielectric response of thermosets and resins depends on a number of factors that vary with frequency, so it is important to select an optimum frequency for dielectric cure monitoring (DEA). To inform this choice, we must look at the material property most directly related to cure state, which is frequency independent ... [Click to Continue...]

Dielectric Cure Monitoring Part Four: Use Log Scales to Get the Most from Ion Viscosity

February 21, 2022 By Jeffrey Gotro 1 Comment

Guest Post by Huan Lee, Lambient Technologies Instead of ion viscosity (electrical resistivity), many users of older cure monitoring equipment measure a material’s conductance and plot the results on a linear scale. Why conductance? Why a linear scale? Because that is an old-school method based on advice from the equipment’s manufacturer. In this post I want to how a linear ... [Click to Continue...]

Dielectric Cure Monitoring Part Three: Real-Time Monitoring of a UV Cured Resin

February 7, 2022 By Jeffrey Gotro 1 Comment

Guest Post by Huan Lee, Lambient Technologies One advantage of dielectric cure monitoring (DEA) is the ability to observe rapid polymerization of UV curable adhesives like H.B. Fuller U3345, [Ref. 1] the topic of this post. In this case the use of techniques such as DSC is not possible, or at least very difficult. But with DEA the electrical resistivity, or ion viscosity, is ... [Click to Continue...]

Dielectric Cure Monitoring Part Two: Cure Monitoring of Epoxy Molding Compound (Part 2)

January 24, 2022 By Jeffrey Gotro 1 Comment

Guest Post by Huan Lee, Lambient Technologies In the first post of this series, we saw in theory how ion viscosity changes as a thermoset cures, and how Critical Points can characterize the cure. Now let’s see how epoxy molding compound cures in reality. Samples of EMC were placed on a Lambient Technologies 1” Unitrode Sensor [Ref. 1], shown in Figure 1, then were compressed ... [Click to Continue...]

Dielectric Cure Monitoring Part One: Cure Monitoring of Epoxy Molding Compound (Part 1)

January 10, 2022 By Jeffrey Gotro 1 Comment

Guest Post by Huan Lee, Lambient Technologies Normally available in either B-staged powders or pellets for transfer molding, epoxy molding compound (EMC) is essential for electronics packaging and is used to encapsulate billions of integrated circuits each year. Figure 1. Granular (left) and pelletized (right) epoxy molding compound [Ref. 1] During cure of EMC, when ... [Click to Continue...]

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Polymer Innovation Blog

I’m Jeff Gotro and welcome to the Polymer Innovation Blog. Over the last 30 years I have been involved in polymers, innovation, along with product and process development. I acquired invaluable experience working for IBM, AlliedSignal, Honeywell and Ablestik Labs (now Henkel). In this blog, I will share some of my experiences, tips, and “tricks of the trade” to get more out of your innovation efforts and discuss new trends and technical advances in the polymer industry.
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Polymers in Electronic Packaging

polymers in electronic packaging Are you confused about what is electronic packaging? Have you ever wondered what type of polymers and polymer-based composites are used in electronics? Learn More...

Practical Tips for Curing Thermosets

practical tips for curing thermosets Have you ever had a question about the degree of cure or is your part fully cured after processing? Confused about what is gelation or how does vitrification impact thermoset curing? Learn More...

Rheology of Thermosets

rheology of thermosets Have you ever had a question about measuring the rheological properties of thermosets Didn’t know what is the right experimental approach to get the right rheological information? Learn More...

Dielectric Cure Monitoring of Thermosets

Dielectric Cure Monitoring of Thermosets Do you have a need for an in-situ cure monitor for a thermoset process but don’t know where to start? Are you confused about the terminology used in dielectric spectroscopy? Learn More...

Introduction to Biopolymers and Bioplastics

Introduction to Biopolymers and Bioplastics Would you like to know how sustainable are bio-based polymers? Or what is the market size and growth rate for bioplastics? Or have questions about the biomass supply chain? Learn More...

Thermoset Characterization

Thermoset Characterization Have you ever had a question about how to measure a physical property of a thermoset? Confused about what is gelation or how does vitrification impact thermoset curing profiles? Or wondered how to measure the glass transition temperature of an epoxy or polyester composite? Learn More...

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