Effect of newly developed (meth)acrylate resins on impact strength in 3d printing
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Impact of Newly Developed (Meth)acrylate Resins on Impression Power in 3D Printing

The Problem

Dymax is creating options that permit photopolymer-based 3D printing resins to fulfill or exceed the capabilities of thermoplastic supplies reminiscent of polycarbonate or ABS, focusing on superior influence and temperature resistance properties. The purpose is enhancements in influence energy whereas sustaining a excessive Warmth Deflection Temperature (HDT).

Materials Reference

Product Title

HR1

BR-952

HR2

Exp. Olig. 1

HR3

Exp. Olig. 2

IM1

Exp. Olig three

IM2

Aggressive Impression Modifier

IM3

BR-344

IM4

BR-5541M

IM5

BR-543

IM6

BR-7432GB

IM7

BRC-4421

The Commerce-Off

Stronger UV-curable supplies with excessive HDTs are typically low in influence resistance, being extra rigid or brittle as a result of a excessive diploma of cross-linking of their molecular composition. However, excessive molecular weight supplies with low crosslink density usually have a low HDT or are too excessive in viscosity to correctly 3D print. To resolve this persistent drawback and obtain development in balancing these properties, chemists want to find out the most effective formulation strategy to realize this stability of properties inside a UV-cured polymer community.

The Supplies

To determine the most effective choices for 3D printing oligomer growth, Dymax explored one idea for bettering influence resistance by modifying onerous, extremely crosslinked networks with versatile impact-modifying resins. Dymax examined three experimental Onerous Resins (HR) each alone and along with a number of Impression Modifying (IM) supplies in a mannequin components. These supplies had been categorized by performance and molecular weight, and included a spread of spine chemistries.

Onerous Resin

Impression Modifying Resin

HDT (°C)

Impression Resistance (J/m)

Formulated Viscosity (cP)

Tensile at Break (MPa)

Elongation (%)

HR1

None

130

12

155

53

four.9

IM1

91

14

160

55

5.three

IM4

97

27

1,190

53

eight.1

IM5

104

33

520

56

6.9

IM6

112

30

700

61

7.7

HR2

None

85

20

650

53

four.2

IM1

79

20

465

54

three.eight

IM4

63

48

2,250

27

6.5

IM5

61

44

1,220

38

four.5

IM6

77

49

1,750

40

four.5

White Paper Outcomes

HR1

HR2

HR3

IM1

✓✓

✓✓

✓✓

IM2

IM3

IM4

✓✓

✓✓✓

✓✓

IM5

✓✓✓

✓✓

✓✓

IM6

✓✓✓

✓✓✓

✓✓

IM7

Key:   ✓✓✓ Best  ✓✓ Better   Good

Printability

As Dymax researches and develops supplies that stability HDT and influence resistance, we additionally should contemplate the constraints of the 3D printing course of, together with low formulation viscosities, restricted light-source intensities, and remedy dynamics of the 3D printing course of. Formulators should additionally stability the necessity to obtain quick remedy pace with the need to reduce half shrinkage with a view to obtain wonderful print decision and dimensional stability.

Tensile Properties

Impact of Newly Developed (Meth)acrylate Resins on Impression Power in 3D Printing

The formulations of HR/IM combos with the most effective stability of influence resistance and HDT properties had been subjected to extra testing to determine potential relationships to tensile energy and elongation. Supplies with decrease functionalities and molecular weight confirmed larger tensile strengths and considerably lowered elongation. In some instances, the HR supplies are in a position to be toughened via the IM modification with a rise in elongation in addition to a continuing or increased tensile energy.

The Outcomes 

The info gathered in testing a number of urethane (meth)acrylate resins has allowed Dymax to increase the attain of light-curing 3D printing processes and acquire highly effective perception into bettering each HDT and IM concurrently, quite than merely sacrificing one for the opposite. As business leaders within the chemistry, mechanical programs, and formulation experience wanted to offer complete options to our 3D printing purchasers, Dymax will apply these learnings to proceed to push our understanding and growth even additional. Obtain our new white paper.

Different Prompt Bomar® Oligomers for 3D-Printing Purposes

Property

Bomar® Oligomer

Neat Viscosity

Viscosity in

30% IBOA (25˚C)

Tensile Power (psi, 30% IBOA)

Elongation
(%, 30% IBOA)

Elastic Modulus (ksi, 30% IBOA)

Inflexible

BR-952

7,200 @ 25˚C

500

10,800

5.four

380

BR-371S

67,000 @ 60˚C

42,000

6,000

four.three

250

BR-741

74,000 @ 60˚C

34,000

9,200

10.zero

390

Robust

BR-541MB

6,400 @ 60˚C

7,400

four,100

85

85

BR-571MB

28,000 @ 60˚C

27,000

four,500

110

140

BRC-4421

6,600 @ 60˚C

6,800

three,000

120

90

BR-970BT

13,000 @ 25˚C

1,000

three,400

50

40

BR-970H

24,000 @ 25˚C

1,400

four,600

6.5

210

Versatile

BR-345

46,000 @ 25˚C

5,200

130

260

zero.1

BR-543

13,000 @ 60˚C

14,000

900

200

zero.9

BR-5541M

24,000 @ 60˚C

23,000

440

270

zero.four

BR-744BT

46,000 @ 60˚C

23,000

1,000

160

2.four

BR-7432GB

88,000 @ 60˚C

65,000

1,400

190

three.2

BRS-14320S

16,000 @ 60˚C

1,800

600

400

1.zero

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