Predicting the laser weldability of dissimilar polymers

Juhl, Thomas Brokholm; Bach, Daniela; Larson, Ronald G.; Christiansen, Jesper de Claville; Jensen, Erik Appel

doi:10.1016/j.polymer.2013.05.053

Cited by 35 publications

(25 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compatibility plays an important role in LTW dissimilar materials. The thermodynamic compatibility can be expressed by:

Δ G = χ \cdot φ_{1} \cdot φ_{2} + \frac{φ_{1}}{N_{1}} \cdot \ln φ_{1} + \frac{φ_{2}}{N_{2}} \cdot \ln φ_{2}

where

Δ G

is Gibbs free energy,

χ

is the Flory–Huggins interaction parameter,

N_{i}

is the degree of polymerization of component number

i

φ_{i}

is the volume fraction of component number

i

, and

φ_{1} + φ_{2} = 1

.…”

Section: Theorymentioning

confidence: 99%

“…The width of the transition layer directly reflects the degree of compatibility between different polymers. The compatibility between different polymers is better, i.e., the degree of the inter diffusion between the molecular chains of two polymers is higher and the transition layer is wider . It is beneficial to interact between molecular chains and the establishment of weld strength during the LTW.…”

Section: Theorymentioning

confidence: 99%

“…If the mesh size is large, polymer interface needs a large equilibrium interfacial width to ensure entanglements. And, vice versa, if the mesh size is small, entanglements can easily occur . Usually, entanglement mesh size is equal to the tube diameter (a).…”

Section: Theorymentioning

confidence: 99%

See 2 more Smart Citations

Investigation on enhancement of weld strength between PMMA and PBT in laser transmission welding—Using intermediate material

Wang

Zhong

Liu

et al. 2016

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(methyl methacrylate) (PMMA) and poly(butylene terephthalate) (PBT) are widely used in industry; however, poor compatibility between two materials lead to poor weld strength. Polycarbonate (PC) has good compatibility with PMMA and PBT. Therefore, the welding method was that PC film as intermediate material was used to enhance weld strength in laser transmission welding (LTW) of PMMA and PBT. Through the LTW experiment, the weld strength was tested by mechanical testing and it was found that the best weld strength was improved more than four times than the weld strength without intermediate material. By observing the micro morphology of the weld zone, one reason was founded that the bubbles can be used to form micro‐mechanical riveting to enhance the weld strength. The reptation time for PMMA, PC, and PBT were investigated to analyze the establishment of the weld strength. When the reptation time is much shorter than time in molten state, the higher weld strength is feasible. It can be concluded that the weld strength of PC/PBT was higher than the weld strength of PMMA/PC. The equilibrium interfacial width was calculated through Helfand's theory to analyze the compatibility of dissimilar materials. The equilibrium interfacial width for PMMA/PC and PC/PBT were similar to tube diameter. That is the reason for weld strength enhancement. And then, the response surface methodology was designed to predict the weld strength.© 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44167.

show abstract

“…Compatibility plays an important role in LTW dissimilar materials. The thermodynamic compatibility can be expressed by:

Δ G = χ \cdot φ_{1} \cdot φ_{2} + \frac{φ_{1}}{N_{1}} \cdot \ln φ_{1} + \frac{φ_{2}}{N_{2}} \cdot \ln φ_{2}

where

Δ G

is Gibbs free energy,

χ

is the Flory–Huggins interaction parameter,

N_{i}

is the degree of polymerization of component number

i

φ_{i}

is the volume fraction of component number

i

, and

φ_{1} + φ_{2} = 1

.…”

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

See 1 more Smart Citation

Investigation on enhancement of weld strength between PMMA and PBT in laser transmission welding—Using intermediate material

Wang

Zhong

Liu

et al. 2016

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Polymer miscibility must be taken into account when dissimilar polymer materials were joined [2]. But generally, most of dissimilar polymer is immiscible in thermodynamically.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Improvements of mechanical properties in dissimilar joints of HDPE and ABS via carbon nanotubes during friction stir welding process

Gao

Shilpakar

et al. 2015

Materials & Design

View full text Add to dashboard Cite

“…73 It is even often not possible to join two dissimilar polymers by means of fusion bonding. 73 Interdiffusion of the molecules is highly influenced by the temperature, composition, miscibility, molecular weight distribution, chain orientation and molecular structure of the adherents. 70,74,75 In addition, the mechanical properties such as strength at the interphase can be affected when the combination is not ideal.…”

Section: Fusion Bonding Processesmentioning

confidence: 99%

Manufacturing of thermoplastic composite sandwich structures

Grünewald

Parlevliet

Altstädt

2016

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

Composite sandwich structures show promising lightweight properties for the aviation industry. Nowadays time-consuming manufacturing methods still prevent an extensive application of composite sandwiches, which can be overcome by the use of thermoplastic polymers in skins and core. During manufacturing of thermoplastic composite (TPC) sandwich structures, the joining of skins and core is a critical step. Therefore, several skin-core joining methods have been under investigation and development in the published literature, which can be categorized into adhesive bonding or fusion bonding. Fusion bonding by means of vacuum moulding, compression moulding or in situ foaming shows great potential for joining sandwich skins and core. Although various phenomena such as core collapsing or skin deconsolidation challenge the processes. This article aims to present an overview of research that has been done in the area of manufacturing TPC sandwich structures and will serve as a baseline and aid for further research and development efforts.

show abstract

Predicting the laser weldability of dissimilar polymers

Cited by 35 publications

References 26 publications

Investigation on enhancement of weld strength between PMMA and PBT in laser transmission welding—Using intermediate material

Investigation on enhancement of weld strength between PMMA and PBT in laser transmission welding—Using intermediate material

Improvements of mechanical properties in dissimilar joints of HDPE and ABS via carbon nanotubes during friction stir welding process

Manufacturing of thermoplastic composite sandwich structures

Contact Info

Product

Resources

About