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Yaygın plastik malzeme zorluklarına pratik yanıtlar

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1343 soru
Q
Fast thermal aging of PU
A
Thermal aging is caused by thermo-oxidation; improving the antioxidant system is key
Material Analysis PU thermal aging thermo-oxidation antioxidant high molecular weight
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Q
Fast UV aging of PU
A
Fast UV aging is caused by photo-oxidation; UV absorber and HALS are key
Material Analysis PU UV aging UV absorber HALS free radical scavenging
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Q
Unstable shrinkage of PU
A
Unstable shrinkage is caused by batch differences and temperature fluctuation; raw material and temperature control are key
Material Analysis PU shrinkage batch difference temperature control stability crystallization consistency
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Q
Poor weather resistance of PU
A
Poor weather resistance is caused by photo-oxidation; UV+HALS+antioxidant triple protection is key
Material Analysis PU weather resistance UV absorber HALS photo-oxidation
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Q
Poor Interfacial Bonding Between PU and Filler
A
The elastomer-filler interface requires the dual action of coupling agent and compatibilizer, otherwise the filler plays a negative effect
Material Analysis PU fillerinterfacial bondingcoupling agentcompatibilizerfiller dispersion
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Q
Dimensional Change of PU Products During Long-Term Storage
A
Dimensional change is caused by physical aging; annealing and slight crosslinking are the measures to stabilize dimensions
Material Analysis PU dimensional stabilityphysical agingannealingsecondary crystallizationslight crosslinking
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Q
EVOH Flexural Modulus Too Low
A
Low flexural modulus is caused by material softness and insufficient filler; adding rigid filler is key
Material Analysis EVOHflexural modulusrigid fillernucleating agentcrystallinity
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Q
EVOH Hydrolytic Aging
A
Hydrolytic aging is caused by water-sensitive polar groups; selecting low-polarity grade is key
Material Analysis EVOHhydrolytic agingpolar groupanti-hydrolysis stabilizerwaterproof coating
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Q
Heavy Smoke in EVOH Processing
A
Heavy smoke is caused by volatile evaporation; cooling and exhaust are key
Material Analysis EVOHprocessing smokevolatilesexhaust systemcooling
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Q
Insufficient EVOH Toughness, Brittle Fracture
A
Insufficient toughness is caused by low molecular weight and coarse crystallization; selecting high MW is key
Material Analysis EVOHinsufficient toughnessmolecular weightcrosslinking controlcrystallization refinement
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