| abstract |
Provided is a solar cell module comprising a solar cell layer and an ionomer sheet comprising an ionomer composition, said ionomer composition comprising a first ionomer that is the neutralized product of a first precursor acid copolymer, wherein, (A) the first precursor acid copolymer comprises copolymerized units, of a first alpha-olefin having 2 to 10 carbon atoms and about 20 to about 30 wt%, based on the total weight of the first precursor acid copolymer, of copolymerized units of a second alpha, beta-ethylenically unsaturated carboxylic acid having 3 to 8 carbon atoms; (B) the first precursor acid copolymer has a melt flow rate of about 70 to about 1000 g/10 min, as determined in accordance with ASTM D1238 at 190°C and 2.16 kg; and (C) the first precursor acid copolymer, when neutralized to a level of about 40% to about 90% with sodium cations, produces a sodium ionomer, having a melt flow rate of about 0.7 to about 25 g/10 min and a freeze enthalpy that is not detectable or that is less than about 3.0 j/g, when determined by differential scanning calorimetry (DSC) in accordance with ASTM D3418. |