Page 63 - 《橡塑技术与装备》英文版2026年2期

INTELLIGENT AND DIGITAL APPLICATIONS

used for dynamic components and protective structures. long-term stability. The mechanical arms and drive wheels of
When utilized in joint connectors, it reduces energy loss humanoid robots play a crucial role in load-bearing and high-
during joint movement due to its low friction coefficient and precision transmission, and PPS, with its excellent dimensional
wear resistance, ensuring smooth movement and extending stability, can maintain stable electrical properties in high-
component lifespan. It can be injection molded into complex- temperature and high-humidity environments.
shaped protective shells, combining flexibility and impact The power center housing (battery box, motor housing)
resistance to protect internal electronic components during of humanoid robots needs to be heat-resistant, flame-retardant,
collisions. and protect its internal components. PPS's heat resistance
2.3.3 PA12 and flame retardancy can avoid high temperature risks. For
PA12, characterized by excellent insulation, elasticity, and the protective layer (shell, protective plate, etc.) of humanoid
fatigue resistance, is used for internal cable sheaths, providing robots, PPS can reduce weight by up to 60% compared to
high insulation performance to prevent circuit short circuits traditional metals, with mechanical strength close to steel. It
and ensure stable operation of electronic systems. When used has strong resistance to corrosive substances such as acids and
for seals, its elasticity and sealing properties prevent dust and alkalis, and excellent electrical insulation properties, which
moisture from entering the interior of machines. It is also used can effectively protect internal components from external
in joint bearings, motor interfaces, and other parts requiring erosion. Through modification technologies such as carbon
protection. fiber reinforcement, PPS can be used for the body and limb
PA covers the multi-dimensional needs of humanoid skeletons, achieving a weight reduction of more than 40% and
robots, ranging from structural load-bearing to precise improving the flexibility of robots.
protection. With the development of material modification 2.5 PC/ABS
technologies (glass fiber reinforcement, alloying), the role of PC/ABS alloy is an engineering plastic made by blending
PA in lightweighting and functional integration of robots will and modifying polycarbonate (PC) and acrylonitrile-butadiene-
become further prominent. styrene copolymer (ABS) through graft copolymerization,
2.4 PPS combining the advantages of both materials to compensate
Polyphenylene sulfide (PPS) is a kind of thermoplastic for their respective deficiencies. It features high impact
special engineering plastic with excellent comprehensive strength, excellent processing performance, weather resistance,
performance. In industrial production, PPS is synthesized and dimensional stability, and is applied in automotive,
through a condensation reaction using p-dichlorobenzene home appliance, and other fields. To enhance the interfacial
and anhydrous sodium sulfide in a polar solvent. The compatibility between PC and ABS, compatibilizers such
polar solvent is selected from N-methylpyrrolidone as maleic anhydride grafted POE and polystyrene maleic
(NMP), hexamethylphosphoric triamide (HMPA), or anhydride graft copolymer (SMA) are added to optimize the
N-methylcaprolactam. PPS is a sulfur-containing aromatic comprehensive performance of the alloy.
polymer. Linear PPS becomes thermosetting after crosslinking The impact strength of PC/ABS alloy at room
at temperatures above 350℃, while branched PPS remains temperature is 3 to 4 times that of pure PC, and it remains
a thermoplastic. PPS is a highly crystalline, hard, and brittle more than twice that of PC even after aging treatment at 120℃
polymer. The relative density of pure PPS is 1.3. It exhibits for 140 hours. After outdoor exposure for 2 years, its tensile
excellent flame retardancy, with an oxygen index of over 44%, strength and bending strength remain almost unchanged.
making PPS a high-flame-retardant material. Its melt viscosity is reduced by 1/3 compared to PC, with a
PPS is applied to structural components, transmission lower molding temperature, small residual stress, and uniform
systems, and protective parts of humanoid robots. Joint links product color. It is suitable for the production of thin-walled,
serve to connect joints and ensure smooth movement, while long-process parts. Its weather resistance is better than that of
PPS, with its high strength and wear resistance, maintains pure PC, and its impact strength remains significantly higher
Vol.52，2026 ·19·