AbstractThe Wescan Model 232‐A VPO was modified with a 12 volt regulated power supply for supplying bridge current and with thermocouples to allow for direct digital readout of the syringe box and measuring chamber temperatures. The modified instrument was used to measureMnof standard (NBS) polyethylenes. Agreement with NBS values was good (within 10) forMn<3 × 104and fair (within 20) forMn= 1 × 105. Results onMnof commercial polypropylenes are also repor
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