Material Analysis
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PPO/PS Alloy Material Selection Positioning
Problem Phenomenon
【Problem Phenomenon】Pure PPO is difficult to process and has poor flowability, and in actual applications pure material is almost unavailable
Cause Analysis
Commercially available PPO is overwhelmingly MPPO blends: PPO/PS amorphous alloy has good processability and low cost, and is the largest variety; PS modification improves processing, stress cracking resistance and impact, with only slight decreases in heat resistance and gloss
Solution
Select PPO/PS alloy for conventional requirements; select heat resistance grade according to PPO content; pure PPO is limited to special occasions; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Ninety percent of PPO applications are MPPO; PPO/PS is the cost-performance mainstay; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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