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Of products of unsaturated polyester resins and Performance Analysis

Easy to crack cast, not suitable for large products, molding process. Jing and the promotion of 5.2 raised the number of dosage (1) rejection of the amount of initiator increased, the reaction is fast, curing speed is accelerated, exothermic effect in the production difficult to control, excessive dosage of initiator after polymerization + on the body concerned. Cure too fast, the growth of chain, reducing the average molecular weight of polymer. Poor mechanical properties of the cured products. Practice shows that, generally caused by pure dosimeter, adding the weight of a resin volume is the best around. (2) when a certain amount of initiator and accelerator + gel time is almost proportional to the amount of added. Curing agent by adding volume control to promote gelation speed. However, for doses exceeding a certain limit (6%),[link widoczny dla zalogowanych], exothermic peak also decreases. But there is no better role in promoting. 5.3 The amount of cured products containing the size of the dirty to FRP example phthalic resin, FRP The higher the fiber content of the higher structural strength. Shown in Table 3. On the other hand + FRP containing higher resin content,[link widoczny dla zalogowanych], the higher the corrosion Majesty. Therefore,[link widoczny dla zalogowanych], when the anti-corrosion lining for FRP. FRP contact with the surface layer of the medium (usually thickness 1ram above) contained in the resin content of at least 65 or more of its outermost surface layer of the best in 80 to improve its chemical resistance of 5.4 volume of cured products,[link widoczny dla zalogowanych], the size of the curing properties of thermosetting resins * 1996 42 Table 3 laps of the products are gel content in the performance of the FRP curing characteristics of the sample of Table 5 test results (25C) FRP mechanical properties of the composition (kg / n ~) of glass fiber 1 bending elastic bending strength resin tensile strength J throw into confusion the amount of j7l483o1.5 �� ioa1255o�� 502412XlOl843l572O10 �� 103l335f651608 �� 1040251751306 �� 1O62. l8050.5 �� 100 Table 4307 unsaturated polyester preparation of the sample proportion of (25c) the name of the weight of raw materials were \ Fu Rang polyester resin powder 60 307 190 50 cyclohexanone peroxide paste 4 alkyl cobalt age lO refuse disclosure of styrene 2-4 afraid \ test test l. Grams of sample 25 g sample gel time (rain) 12225 Solid {t time (rain) 2829 hit the highest thermal peak (c) l197l76 forming large products (especially thick products) and the cast pieces should pay full attention to its release Hot pestle l students,[link widoczny dla zalogowanych], in order to avoid violence and destruction of polymer products. To ease the heat conditions. Polyester resin must be properly selected the variety and amount of initiator.