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I write about the polymer behavior behind industrial bonding. My articles discuss crystallinity, what its measurement can and cannot show, and how polymer physics relates to bonding failures. I aim to make these concepts useful when readers investigate a material or process problem.
Energy Dissipation in Polymers: Definition, Mechanical Hysteresis Loops, Loss Factor, and Test Conditions
By DD | Reviewed by the Shanghai Tengyang New Materials Technology Co., Ltd. technical team In polymer physics and adhesive mechanics, dissipation describes the irreversible conversion of ordered mechanical work into random internal thermal motion. In an ideal Hookean spring,…
Adhesion: Molecular Forces Across an Interface and How It Differs from Cohesion
Update: Nov. Updated November 2026 · 2026 Technical Surface Science Guide · Reviewed by DD, Bonding Materials Specialist Adhesion is the cross-boundary attraction in materials science that holds dissimilar materials together at sub-nanometer contact. Intermolecular dispersion forces, polar hydrogen bonds,…
Creep vs Stress Relaxation: Loads, Strain and Time
Updated October 2026 A polymer strip can keep stretching with the same weight attached. If you hold the length of some other strip fixed, the force needed to hold it can decrease. Changes in what’s held constant explain creep vs…
Differential Scanning Calorimetry: Reading Polymer Curves
Updated October 2026 Differential scanning calorimetry measures how a sample releases or absorbs heat during a controlled temperature program. Identify a polymer curve by indicating the axes and scan segment first, then distinguish a glass-transition step from crystallization and melting…
Polymer Crystallinity: Meaning and Measurement Limits
Crystallinity in polymers is the fraction of a specimen assigned to ordered material, defined by stated limits and an analysis model. It isn’t an unrestrained, absolute count of perfectly aligned molecules in the specimen. Differential scanning calorimetry (DSC) is one…
How Polymer Physics Explains Industrial Bonding Failures
Polymer physics for bonding is the fundamental science of adhesion applied to real joints: why a joint forms, why it can fail, and what data is still missing. For a thermoplastic hot-melt adhesive, the discussion shouldn’t be “heat = adhesion.”…
Glass Transition vs Melting Point: How to Tell Them Apart
Glass transition vs melting point refers to the difference between two thermal events in polymers: the glass transition temperature (Tg), where amorphous regions gain mobility, and the melting temperature (Tm), where crystalline order is lost in a phase transition. Tg…
Young’s Equation: Contact Angle, Terms and Assumptions
Short answer. The young equation is an ideal equilibrium model for the contact angle of a liquid on a solid, balancing the three interfaces meeting at the contact line. In plain search language, this is the equation people mean when…
Dyne Testing: Reading Wetting Tension and Its Limits
Surface Energy: Meaning, Units and Bonding Relevance Blogs By DD · Updated September 26, 2026 · Focus keyword: dyne test A dyne test is a testing method that screens whether a chosen test liquid reaches adequate wetting tension and spreads…
Contact Angle Hysteresis: Advancing and Receding Angles
![Contact Angle Hysteresis: Advancing vs Receding [Guide]](https://bonding.tengyangfilm.com/wp-content/uploads/2026/09/contact-angle-hysteresis-retry-blog-featured-768x512.png)
Surface science guide Contact angle hysteresis is the difference between an advancing contact angle and a receding contact angle measured on the same liquid-solid system under a stated protocol. It can often times reveal contact-line pinning and wetting history, which…
