材料特性：FDM 用 ABS（丙烯腈-丁二烯-苯乙烯）
FDM 工程材料技術報告系列
摘錄自製造商技術數據表和同行評審文獻
摘要—ABS 是最初的工程 FDM 熱塑性塑料，與注塑成型的樂高積木、汽車飾板和消費電子產品外殼屬於同一聚合物系列。與 PLA 相比，它具有更高的使用溫度和抗衝擊性，但代價是需要更嚴苛的列印條件（封閉式腔體、加熱床、苯乙烯廢氣通風）。本特性介紹涵蓋標準/通用 ABS 等級；如需增強剛性（ABS-M30 / Enhanced）、ESD、阻燃或碳纖維變體，請參閱相應的材料特性卷（06、04、05、07）。
索引詞—增材製造、FDM、ABS、通用工程熱塑性塑料、丙酮平滑處理。
一、 材料識別
本節建立材料的規範名稱和商業名稱。
A. 名稱
商品名稱：ABS（通用、無商標）。商業等級包括 Stratasys ABS、Polymaker PolyLite™ ABS、Bambu Lab ABS、eSUN ABS+、MatterHackers Build Series ABS。大多數消費級 ABS 線材均基於 Lustran®、Cycolac® 或類似 SABIC / INEOS / LG Chem 注塑級樹脂。
B. 化學全稱
丙烯腈-丁二烯-苯乙烯三元共聚物——一種兩相聚合物，其中聚丁二烯橡膠顆粒分散在連續的苯乙烯-丙烯腈 (SAN) 基體中。SAN 主鏈提供剛性和耐化學性；聚丁二烯橡膠提供抗衝擊韌性。
C. 別名和替代名稱
|
別名 |
來源 / 用途 |
|
ABS |
標準通用名稱 |
|
丙烯腈-丁二烯-苯乙烯 |
完整化學描述 |
|
Lustran®、Cycolac®、Magnum® |
SABIC、Trinseo 等公司的常見基礎樹脂商品名稱 |
|
樂高®塑料 |
常見參考（樂高積木為注塑成型 ABS） |
二、 組成和分子結構
A. 經驗化學式
理想組成：[(C₃H₃N)ₐ-(C₄H₆)ᵦ-(C₈H₈)ᵧ]ₙ，其中典型質量分數為 20–30% 丙烯腈、5–30% 丁二烯和 40–60% 苯乙烯。確切的比例決定了性能平衡。
圖 1。 聚合物基體的重複單元/結構示意圖。
圖 2。 單相聚合物示意圖（無增強）。
B. 成分分解
表 I
ABS 的成分分解（典型 / 根據供應商數據表）
|
成分 |
質量分數 |
功能 |
|
丙烯腈 (AN) |
≈ 20–30 wt% |
提供剛性和耐化學性；腈基抵抗碳氫化合物 |
|
丁二烯橡膠 (B) |
≈ 5–30 wt% |
分散的橡膠顆粒；抗衝擊韌性；C=C 鍵驅動紫外線降解 |
|
苯乙烯 (S) |
≈ 40–60 wt% |
提供加工性和表面光澤；基體成分 |
|
抗氧化劑、熱穩定劑、潤滑劑、著色劑 |
< 1 wt% |
加工助劑 |
|
Total |
100 wt% |
— |
III. MECHANICAL PROPERTIES — XZ PRINT DIRECTION
In the XZ orientation the tensile load is applied parallel to the deposited rasters; for fibre-reinforced grades this is the strongest orientation because the fibres align preferentially along the extrusion direction.
TABLE II
MECHANICAL PROPERTIES — XZ ORIENTATION (ABS)
|
Property |
Value (XZ) |
Test method / source |
|
Tensile strength, ultimate |
≈ 30–37 MPa |
ASTM D638 (typical FDM ABS) |
|
Tensile strength, yield |
≈ 30 MPa |
ASTM D638 |
|
Elastic limit |
~ 2 % strain (estimate) |
Engineering estimate |
|
Young's modulus |
≈ 2.2–2.4 GPa |
ASTM D638 |
|
Elongation at break |
≈ 6–10 % |
ASTM D638 |
|
Izod impact, notched (23 °C) |
≈ 100–200 J/m (much higher than PLA) |
ASTM D256; rubber phase dominates impact response |
IV. MECHANICAL PROPERTIES — ZX PRINT DIRECTION
In the ZX orientation the tensile load is applied perpendicular to the print layers, so failure occurs through inter-layer (Z) bonds. Properties are markedly lower than in XZ — this anisotropy is intrinsic to FDM.
TABLE III
MECHANICAL PROPERTIES — ZX ORIENTATION (ABS)
|
Property |
Value (ZX) |
Test method / source |
|
Tensile strength, ultimate |
≈ 22–28 MPa |
ASTM D638 |
|
Tensile strength, yield |
≈ 22 MPa (estimate) |
Engineering estimate |
|
Elastic limit |
~ 1.4 % strain (estimate) |
Engineering estimate |
|
Young's modulus |
≈ 2.1 GPa (estimate) |
Engineering estimate |
|
Elongation at break |
≈ 2–3 % |
ASTM D638 |
|
Izod impact, notched (23 °C) |
≈ 50 J/m (estimate) |
Engineering estimate |
Standard ABS has XZ:ZX UTS ratio ≈ 1.4:1 — moderate anisotropy. Layer-bonding quality is highly sensitive to chamber temperature: an open-frame print produces ~30% lower Z-direction strength than the same part printed in an actively heated enclosure. Inter-layer porosity is the dominant Z failure mode.
V. RECOMMENDED PRINT PARAMETERS
Values summarised below give consensus operating windows from public datasheets. Specific suppliers may differ within ±10 °C; the supplier datasheet always supersedes this table.
TABLE IV
RECOMMENDED PRINT TEMPERATURE RANGES FOR ABS
|
Parameter |
Range |
Notes |
|
Nozzle temperature |
230–250 °C |
Standard brass or hardened nozzle |
|
Build plate temperature |
90–110 °C |
PEI / Kapton / glue stick required for first-layer adhesion |
|
Chamber temperature |
70–85 °C (closed enclosure strongly recommended) |
Mandatory for warp-free large parts; shrinkage on cooling is the principal print failure mode |
|
Pre-print drying |
Optional, 70 °C × 4 h |
Mildly hygroscopic |
|
Ventilation |
Required (styrene VOCs) |
ABS off-gases styrene during printing — ventilate or filter |
VI. GLASS TRANSITION TEMPERATURE (TG)
Reported / typical Tg: ≈ 105–110 °C.
ABS is fully amorphous (no crystallinity, no melting point in the conventional sense). Tg is dominated by the SAN phase; service temperature is generally limited to ~80 °C continuous to maintain dimensional stability. Annealing is generally not performed on amorphous ABS; instead, post-print stress-relief at 70–80 °C × 2–4 h can be used to relieve residual print stresses, and acetone-vapour smoothing is widely used for cosmetic finishes.
VII. HEAT DEFLECTION TEMPERATURE (HDT)
Heat deflection temperature is the temperature at which a standard bar deflects 0.25 mm under a specified flexural load (ASTM D648 / ISO 75).
TABLE V
HEAT DEFLECTION TEMPERATURE OF ABS UNDER STANDARD TEST LOADS
|
Test load |
HDT |
Standard / source |
|
0.45 MPa |
≈ 96–100 °C |
ASTM D648 (Stratasys / typical ABS) |
|
1.82 MPa |
≈ 76–82 °C |
ASTM D648 |
VIII. DISTINGUISHING CHARACTERISTICS AND STANDARDS
A. Higher temperature and impact than PLA
ABS's continuous service to ~80 °C and 100+ J/m notched impact strength make it the standard for functional / mechanical parts that PLA cannot survive — automotive cabin parts, drone arms, snap-fits subject to repeated flex, and parts in contact with warm fluids.
B. Acetone vapour smoothing — uniquely available for FDM
ABS dissolves in acetone (CH₃COCH₃), enabling vapour-phase chemical smoothing that yields injection-mould-quality surface finish. Place printed part in a sealed container with acetone-saturated cloth at 50–60 °C for 5–30 minutes; the surface layer briefly liquefies and reflows, eliminating layer lines. The technique is unique to ABS / ASA among common FDM polymers.
C. Soluble support compatibility
ABS is compatible with Stratasys SR-30 / SR-35 soluble support material (chemical removal in alkaline solution), enabling complex internal geometries that would be unprintable with break-away supports. This is widely used in industrial Stratasys Fortus systems.
D. Print difficulty and limitations
ABS's high CTE (~9 × 10⁻⁵ /K) and crystallisation-free shrinkage on cooling make it prone to warping, layer separation, and corner curl — particularly for large parts. Closed enclosures with active temperature control are essential. ABS is also UV-sensitive (yellowing / embrittlement on outdoor exposure); for UV-stable applications, use ASA (volume 08) instead.
IX. REPRESENTATIVE APPLICATIONS
ABS is typically deployed in the following applications:
1) Functional prototypes: End-use part validation prior to injection-mould tooling commitment.
2) Consumer product housings and casings: Same polymer family as injection-moulded electronics enclosures, providing realistic prototypes.
3) Automotive interior components: Cabin trim, fixtures, fittings — matching injection-moulded ABS in service environment.
4) LEGO-compatible / interlocking models: Same chemistry as commercial bricks; suitable for compatible custom pieces.
(Source : All3dp)
5) Acetone-smoothed cosmetic models: Display / show pieces requiring smooth surfaces without sanding labour.
(Source : Reddit)
X. REFERENCES
[1] Stratasys, “ABS Material Data Sheet,” 2023. Available: https://www.stratasys.com/en/materials/materials-catalog/fdm-materials/abs/
[2] Polymaker, “PolyLite™ ABS Material Data Sheet,” 2024.
[3] SABIC, “Cycolac® ABS Resin Selector Guide,” 2024.
[4] B. Vasudevarao et al., “Sensitivity of Rapid-Prototyping Surface Finish to Process Parameters Variation,” Solid Freeform Fabrication Symposium, 2000.
[5] ASTM D638-14; ASTM D256-10; ASTM D648-18.
[6] UL 94, “Tests for Flammability of Plastic Materials,” Underwriters Laboratories, 2018 — note: standard ABS is HB rated only; for V-0 see Volume 05 (ABS FR0).